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After running for a long time, the ball mill will more or less encounter the problem of grinding efficiency decline, which not only affects the normal operation of the whole concentrator, but also damages the economic benefit of the mine owner. So, in production practice, how should we effectively improve the grinding efficiency of ball mill? Here are seven ways to start. 1, enhance the grinding degree of raw ore In general, the hardness of raw ore, degree of dissociation, size and structure determine the grinding degree of raw ore. The grinding degree is small, indicating that the raw ore is easy to grind, and the wear of the ball mill lining plate and grinding medium is relatively small, and the energy consumption is low; The grinding degree is large, indicating that raw ore is difficult to grind, and the wear of ball mill lining plate and grinding medium is also large, and the energy consumption is high. It shows that the grindability of raw ore directly affects the grinding efficiency of ball mill. Therefore, in the production, when the raw ore is difficult to grind and the particle size requirements are fine, we can in the case of economic and site permit, take certain measures to enhance the grinding degree of raw ore, such as adding chemical agents in the grinding process to increase the grinding efficiency; Or from the raw ore grinding degree of efforts: heating the minerals in the raw ore, reduce hardness. 2, more grinding and less grinding, reduce the ball mill into the grinding size The larger the grinding size, the greater the work of the ball mill on the ore, the grinding efficiency of the ball mill will naturally be affected. In order to achieve qualified grinding fineness, the ball mill workload is bound to increase, energy consumption will also increase. If you want to reduce the size of the feed, it requires small particle size of the broken product, that is, "more crushing and less grinding", so that the feed size is appropriate, the grinding efficiency of the ball mill will be improved. 3. Keep the appropriate steel ball filling rate When the ball mill keeps a certain speed, the higher the ball filling rate is, the more times the material is hit, the greater the grinding area will increase, and the grinding efficiency of the ball mill will increase correspondingly, but the energy consumption is also large. However, if the steel ball filling rate is too high, it is easy to change the motion state of the steel ball, but reduce the impact effect on the large particle material. In production practice, most mines will set the filling rate at 45%~50%, but this is only a rough range, because the actual conditions of each plant are different, blindly copying will not achieve the ideal grinding efficiency, it depends on the situation. 4. Add steel balls reasonably In the long running process, the mutual grinding between the ball mill and the ore will cause the wear of the ball to a certain extent, resulting in the change of the ratio of different sizes of the ball, resulting in the change of the fineness of the grinding products, and then affect the grinding efficiency of the ball mill. Therefore, the operator of the ball mill needs to check the ball situation regularly and add the ball reasonably to ensure the stable production of the ball mill. 5. Strictly control the grinding concentration of ball mill Generally, the grinding concentration will affect the proportion of pulp, slurry fluidity and the adhesion of ore particles to the steel ball. The grinding concentration is low, the pulp flow is fast, the material is not easy to stick around the steel ball, weaken the impact and grinding effect on the material, resulting in unqualified ore size, ball mill grinding efficiency is not high; The grinding concentration is high, the material is easy to be around the steel ball, enhancing the impact and grinding effect on the material, but the pulp flow is slow, easy to cause overgrinding. In the production practice, the grinding concentration can be controlled by controlling the feed amount and water amount of the ball mill, or adjusting and controlling the particle size composition and water content in the grading sand return, so as to help improve the grinding efficiency of the ball mill. 6. Optimize the grinding process of ball mill According to the ore properties of raw ore (useful mineral disseminated particle size, monomer degree of liberation, gangue mineral disseminated particle size) to optimize the grinding process, such as pre-tailing, pre-enrichment, stage grinding, pre-classification, on the one hand to reduce the amount of grinding, on the other hand, timely recovery of useful minerals, can improve the grinding efficiency of the ball mill. 7. Improve grading efficiency The effect of grading efficiency on grinding efficiency is self-evident. High grading efficiency means that qualified particles can be discharged in time and efficiently, while low grading efficiency means that most qualified particles can not be discharged and returned to the ball mill for regrinding, easy to cause overgrinding. In production, two stage grading or improved grading equipment can be used to improve grading efficiency and accordingly improve grinding efficiency of ball mill.

As a common modern beneficiation process, flotation is widely used in concentrator. Due to the strict control of flotation on grinding fineness, pulp concentration, reagent and other aspects, operators are required to check the flotation condition frequently in the process of flotation machine operation. Below we will summarize some common flotation anomalies and see what can be done to solve these phenomena. 1. Poor flotation effect and high tailing loss This situation may be caused by the fact that the grinding fineness of the material in the flotation machine is not up to the standard or the dosage problem of flotation reagent. If the fineness of grinding can not reach the target, the fineness of grinding should be appropriately improved, and the number of grinding sections can be increased, or the way of stage grinding can be treated. If the flotation reagent dosage problem occurs, the flotation reagent should be tested to determine the dosage and index of flotation reagent. For example, for a copper-cobalt oxide ore in Congo, the main copper minerals are malachite and cobalt minerals are hydrocobalt. In order to improve the flotation effect, sodium hydride and ammonia sulfide are mixed at a ratio of 1 to 1 after the test to improve the flotation effect. 2. The flotation cell foam is large and the surface is reflective When large foam appears in the flotation tank and the surface reflects light, the possible reason is that too much flotation reagent is added. At this time, the operator should adjust the dosage of flotation reagent appropriately to observe whether the flotation foam condition is improved. 3. The liquid level of single flotation cell is on the high side The high liquid level of a single flotation tank may be caused by the blockage of the suction pipe. At this time, the operator needs to stop the suction pipe to clean it. 4. The scraper blows out foam with a large amount of pulp, and the foam layer is thin and fragile There are four possible reasons for this situation: first, the overflow concentration is too thin; second, the position of the level control plate is too high; third, the slurry overflow concentration is too strong, which will also lead to coarse running and serious sand settling; fourth, the dosage of inhibitor and regulator is too large, which makes it impossible to produce appropriate foam. In this case, the operator should first observe the situation, control the pulp concentration and fineness, and pay attention to control the dosage of adjusting agent and inhibitor. 5, local liquid surface flower The phenomenon of turn-over on the liquid surface of the tank indicates that the slurry foam layer is unstable. It may be that the cover plate is not evenly installed, resulting in uneven clearance. When one side is large and the other side is small, the phenomenon of turn-over will occur on the side with large clearance. It is also possible that the stator is falling off and the residual pulp flows unevenly at the bottom. The last possibility is a loose pipe joint. These three cases are caused by flotation machine failure, the operator needs to inform the machine repair treatment in time. 6, ore grout level falling The fall of ore slurry level may be caused by too coarse grinding fineness, increased processing capacity, or insufficient dosage of reagents. This can be done by adjusting the grinding classification, reducing the amount of ore to be fed, or adjusting the dosage appropriately. 7.Bubbling, foam tank ore accumulation Generally speaking, there are several reasons for this situation: too much ore feeding, too much aeration, blockage in the middle box and the level control board, insufficient pulp suction capacity of the suction tank, too small flushing water pressure, etc. In these cases, the liquid level adjustment plate jam is the most likely to cause grit, should minimize level adjustment plate, dredge clogs, necessary to open the bottom valve, make the slurry flow and check whether your and acid pipe blocked, at the same time should be proven to ore and overflow concentration, timely find out the reason, and timely adjust to ore according to reason or other factors. 8. There is no pulp in the tail dc slot, the scraper is serious and the overflow fineness runs thick When this phenomenon occurs, the operator should stop the mine first, and then open the bottom flow valve at the bottom of the tank, and then feed the ore and plug the bottom flow valve when the pulp flow returns to normal. At the same time, attention should be paid to control the thickness and fineness of the pulp.

Ball mill is indispensable equipment in the concentrator, but also the whole concentrator construction is very key equipment, so it is very important to ensure the stable operation of the ball mill. But before the formal operation, ball mill debugging is a very important step, can not appear any point of deviation, otherwise it will lead to ball mill product granularity can not meet the requirements, even reduce the metal recovery rate. So how to carry out the ball mill debugging work? Ball mill debugging should confirm whether to meet the debugging conditions, empty running and load running, check the status of various aspects of the equipment and so on. 1, check whether the ball mill meets the following debugging conditions Is the ball mill equipment installed according to the drawings, to ensure that all parts of the equipment in the correct position. It is required to have a complete installation process record and acceptance; The strength of the equipment foundation concrete and the strength of the secondary grouting concrete should reach the strength grade of the design requirements; PLC control system, temperature meter and pressure gauge of ball mill can be put in reliably. Ball mill equipment installation completed, grinding workshop system is complete; There is no garbage and debris in the surrounding environment of the equipment, and the scaffolding shall be removed; Ensure complete water power, electricity and communication facilities; Ensure smooth channel, convenient for operators to pass smoothly; Ensure that the surrounding environment is free from inflammable and explosive objects that are easy to cause safety accidents, and equipped with corresponding fire protection facilities to guard against accidents; Ensure that the lubrication dose used in the operation of the ball mill is enough; 2. Check the ball mill before debugging The inspection work should be careful to keep the equipment in good condition. Details are as follows: The fan-shaped block and bearing bush of the lower bearing seat should be calibrated with the center line; Main and pinion gears are calibrated according to instructions. The fan-shaped block of the lower bearing seat, the bottom plate of the pinion, the bottom frame of the main gear and the bottom frame of the motor are completely grouting, and the grouting intensity meets the design strength requirements. All anchor bolts, connection bolts and anchor bolts for the main gear should be tightened. The fixing bolts of the big gear should be tightened according to the specified torque. The bearing bush should be installed on the fan-shaped block of the bearing seat according to the rotation direction of the ball mill; Bearing bush is corrected according to axial guide ring; The bearing seat seal is installed correctly and the joint point is sealed with sealant. Ball mill all lubrication points in accordance with the lubrication requirements of sufficient; Good lighting for lubricating oil station, bearing, reducer and motor. Pipes and hoses are installed in the correct order, and in accordance with the assembly instructions, no blockage of the pipes; Inlet and outlet hopper joints are well sealed. The temperature sensor is installed in the bearing bush and has been electrically tested. The sensor head is in good contact with the metal. Ensure that monitoring equipment is properly connected; Flow monitor, pressure switch and temperature sensor set; Reliable indication of oil pressure gauge, thermometer, accident button and interlocking device. Prepare the necessary tools in advance: thermometer, vibration meter, listening stick, intercom, test run record form. 3. The ball mill is running empty The motor should first run for 2 hours under the condition of no load of the ball mill. During this period, the correct rotation direction of the motor and the normal and reliable operation of the accident button should be ensured to ensure safety. If the motor runs normally when idling, then idling with reducer for 2 hours. Connect reducer and pinion coupling, install protective cover, start lubricating oil system or cooling water system. Power on the ball mill, after normal rotation, press the accident button to stop, and check the main bearing, motor, size of gear, judge whether the ball mill rotation direction is correct, if there is no abnormal situation, start the ball mill for 8 hours. During the trial run, to check the ball mill bearing seal heating, lubricating oil temperature pressure, temperature is best controlled between 40-50℃, if there is abnormal, immediately stop cooling; After the operation, check the distribution of force between the size of the gear, should be greater than 70%. When running empty, if the lubricating oil system works normally and no oil leakage occurs, the ball mill runs smoothly and without obvious noise, the vibration value of main bearing, motor and pinion does not exceed 0.1mm, and there is no obvious damage and hot phenomenon of each part, then the running of empty car is normal. 4, ball mill with load test According to the ratio of the ball mill, a certain amount of steel balls are added to the cylinder body of the ball mill, and the steel balls are added in batches. In the process of operation, bearing temperature, current, and vibration intensity are measured. After the ball mill is installed, start to run with load, add 70% of the specified load into the mill materials, continue to run for more than 10 hours, during the process to tighten the ball mill inner thread joint and check the thread connection place frequently to prevent loosening. When operating with load, the ball mill should meet the following requirements: the vibration of each part is not more than 0.1mm, the current of the motor has no abnormal fluctuation, the operation process is stable, the noise is small, the connecting bolt is fastened, and the cylinder body is well sealed.

Shaking table is one of the widely used gravity separation equipment. Shaker separation is high, the concentration ratio of the concentrate is very high. During the operation of the shaker, mineral separation is achieved by the combination of bed surface and transverse flow. In order to reduce failures and improve sorting efficiency, operators need to seriously understand the operation skills of the shaker, and maintenance. First, shaking table operation skills In the operation of the shaker, it is necessary to carefully observe the partition of the shaker surface and control the appropriate vertical and transverse slope of the bed surface. In addition, it is also necessary to consider the feeding size, feeding amount, feeding concentration, washing water, stroke and other factors in the separation process. Below we aim at the above several main factors, to carry on the simple explanation to the operation skill of the shaker. 1, shaker bed surface partition The bed surface is divided into fine area, middle area, tailing area and slime area. Under normal conditions, the width of the slime area is 0.9 ~ 1.4m. The ore flow in the tailing area should be stable without rapids or furrows, and the thickness of the ore layer should be suitable and covered by water. Tail mine can be controlled by adjusting feed concentration and feed trough sand hole. Middling area is the interval of middling area, which is controlled mainly by adjusting flushing water and transverse slope. The concentration area requires obvious zoning of various specific gravity minerals, and a stable and obvious boundary between the concentration area and the primary selection area should be formed. This area is controlled by adjusting the flushing water and the transverse slope. 2. Horizontal and longitudinal slope of the bed surface of the shaker In the installation of equipment, determine the longitudinal slope, coarse sand area in the longitudinal tilt of 1° ~ 2°, fine sand area 0.5° ~ 1.0°, slime area basically no slope. The bed surface is 1.5°~5° laterally inclined from feeding end to opposite side. In the actual operation of the shaker, it is necessary to accurately control the longitudinal and transverse slope of the shaker surface. In general, if the mineral particles are coarse, the lateral slope of the shaker surface should be appropriately raised. On the contrary, if the mineral particles are fine, it is necessary to lower the horizontal slope of the bed. In general, the transverse slope range of coarse sand area, fine sand area and slime area is 2.5° ~ 4.5°, 1.5° ~ 3.5° and 1° ~ 2° respectively. 3, ore size The ore size should be appropriate. The upper limit of feeding particle size is 2~3mm, and the lower limit is 0.037mm. Generally, after pre-classification to ensure the uniformity of particle size at all levels, in order to ensure the uniformity of particle size at all levels of shaking table, and the feeding particle size in the suitable range, it is necessary to observe the ore belt concentrate and panning to check tailings. 4. Ore feeding quantity The size of ore feeding is related to the thickness of the feeding granularity. If the ore grain is coarse, the amount of ore feeding is larger; But if the ore feed is too large, it will cause zoning problems, in this case, it is necessary to move the concentrate interception plate, increase the flushing water and the lateral slope of the shaker bed surface. It should be noted that once the exact amount of ore feeding is found, the feeding process should be continuous and uniform. 5. Ore feeding concentration In the process of separation, it is necessary to ensure the appropriate concentration of ore feeding. Generally, the feeding concentration of coarse and fine mineral is 20% ~ 30% and 15%~25% respectively. When the surface of the shaker is pulled ditch problem, the concentration of ore can be appropriately increased to adjust; On the contrary, if there is a sand pile, at this time it is necessary to reduce the concentration of ore. The concentration of ore feed can be controlled by adjusting the amount of ore feed. 6. Rinse water Flushing water includes ore water and washing water. In the operation of the shaker, when the concentrate zone becomes narrow, there is a concentrate running into the middling, the need to reduce the washing water; On the contrary, if the surface of the shaker shows anhydrous film, it is necessary to increase the washing water. When controlling the flushing water, the pulp velocity and the width of concentrate zone should be carefully observed. 7. Stroke and stroke The stroke and stroke time are mainly affected by the grain size of mineral, the load of shaker and the density of ore. Select coarse grain, thick bed material, should use large stroke, small impact; On the contrary, it is necessary to use small stroke, large stroke. When failure occurs, it is necessary to check whether the stroke times are appropriate. If there is any abnormality, it is necessary to adjust in time. Two, shaker maintenance points 1, need to regularly check the parts is good enough, mainly including the bed surface of the shaker, the head of the bed and the frame. First of all, we need to check whether the surface of the shaker is in contact with non-shaking parts and the tilt of the surface of the bed. If the surface of the shaker is found to be damaged, resin packing wear-resisting agent can be prepared to repair it. 2, check the wear of the head of the bed parts, when it is found that the wear of the parts is very serious, it needs to be replaced in time. 3. Check whether the screw is loose, the position of the pull rod, whether the spring is damaged, and whether the sliding surface of the shaker is good. If any abnormal sound occurs, locate and eliminate it in time. 4. When the storage box is shaken, special attention should be paid to prevent the surface of the shaker from deformation. It is not allowed to be exposed to the sun and rain, causing humidity. 5. When stopping the car, in order to avoid impurities from oxidizing and scaling, it is necessary to wash the surface of the shaker with water. If scaling occurs, remove it in time. In order to improve the efficiency of the shaking table, Yantai Xin Hong suggests that you, in full consideration of the actual situation, can refer to the above operational skills and maintenance points to rational use of shaking table, reduce and solve various problems in the process of selection.

Doing Gold Mining Equipment and Mining Spare Parts,we are professional. During last week,we have prepared a lot of gold mining spare parts to Port Sudan,the major spare parts includes: ball mill liners, motor,reducer,gearbox,steel roller,rubber roller,bearing,slurry pump,centrifugal water pump,shield pump,and magnetic pump etc. According to our experience,the spare parts cannot be used immdeiately,so we have put all of the spare parts in the plywood carton to protect them.AS MSK website shows,these containers will be reached PORT SUDAN after 50 days,wishing our customer can use them ASAP. Attached some loading photos in Qingdao Port,China. Pls donot hesitate to let us know if you need any gold CIL equipment or spare parts, WhatsApp: 008615106533168 or email:sinotouch@miningepcm.com

As we all known, jaw crusher in the lab is very important,we can provide all kinds of mining lab equipment and instruments.Jaw crusher is only for the primary crushing,and then we can use double roller crusher or PEX types crusher for more finess particle.Besides jaw crusher,the major lab equipment for gold mine includes Drying Oven,Filter,Flotation cell,Small leaching tanks,shaking tables etc. Attached is our package for the lab equipment,please contact us if you need any lab equipment and instruments. Company WhatsApp: 008615106533168 (24hours online), or email sinotouch@miningepcm.com

Orange-red color is SINO TOUCH major color,and we treat all the mining equipment and mining spare parts as our baby,and will paint this "fortunate" color to all of our customer. For the belt converyor in the gold mining,the iron roller size normally is 190mm,240mm,600mm,750mm etc.also for the carrying rubber roller,the size also have 190mm,240mm,600mm,750mm etc. As professional mining equipment supplier in China,we have manufactured all kinds of belt converyor to different mines all over the world. The width of belt started from B500 to B1200. Attached is our new package today to Africa customer,if you order our mining spare parts,same package as below: Please contact us for any inquiry about gold mining equipment,as we have rich gold mining epcm all over the world. "DO ONE THING AT A TIME,AND DO WELL"wishing to hear from you soon,my WhatsApp: 008615106533168 (Mr.Matthew 24 hours online). Good Luck my dear friends!

Grinding ball mill is used for all kinds of mining,especially in the gold mining. Our ball mill have below advantages: 1. Energy saving up to 20%-30% 2. Using groove-type circular lining plate,increasing contact area of steel ball and ores 3. Adopting oil-mist lubrication device which can guarantees smooth operation of gears. Below ball mill is used in 500t/d gold CIL plant in Africa countries. Ball mill likes the heart of the gold plant, chooing one good quality and service is very important. We can provide the best quality and price ball mill to you. welcome to WhatsApp me 008615106533168 (24 hours online)

Time flies,when I first time to Africa ,time is in Feb.2013, the final destinatioin is Khartoum,Sudan. Before I visited there,I have no idea about local temperature and environment.When the flight arrived Khartoum airport,I stepped out of the cabin,there was a sudden surge of heat to my face.Wow,this is the feeling of Khartoum,Sudan----too hot. Fortunately, I can still find some photos in KHARTOUM, just forget about GOLD Mining EPCM,and let us enjoy the beautiful time. Up to now,around 9 years passed,and I have more than thousands of Sudan friends,whom doing gold mining in different methods, likes CIL,CIP,heap leaching etc. I alwayed treated Sudan as my second hometown, greetings with them Sallam and replying in Allhamdullah.We all known 2021 is special year for Sudan,just hoping safety and peaceful will surround them forever.

Trademark for Sino Touch Mining EPCM has been registered successfully. In order to promote our products in the market well, we have successfully registered two trademarks for Sino Touch. Trademark means reputation in the world, we will work hard to make sure the good quality for all the mining equipment and spare parts.Up to now,the major mining equipment we manufacture is JAW CRUSHER, CONE CRUSHER, BALL MILL, HYDROCYCLONE, THICKENER, FLOTATION CELL, SMELTING EQUIPMENT and so on. For the mining spare parts, we have STEEL BALL, BALL MILL LINERS, SLURRY PUMP, BELT, VALVES, ELECTRIC PARTS ETC. welcome to contact us by WhatsApp (24 hours online): 008615106533168 (Mr.Matthew) or Email us by sinotouch@miningepcm.com

Vibrating screen is very important auxiliary equipment in mine production, once the failure will directly affect the normal operation of the production line. As a common type of shaker, circular shaker (also known as: circular shaker) in the daily operation of the common problems are what? When we encounter these problems, how do we solve them? This paper analyzes the causes of five common problems of circular shaker and puts forward countermeasures. A, circular vibrating screen shaft fracture In general, the circular vibrating screen is mainly driven by the motor with eccentric quality of the vibrator to produce vibration. In the vibration process, the shaft is the key component that drives the vibration of the circular vibrating screen, and receives a large force. Therefore, in practice, shaft fracture is a common fault. Once the shaft fracture problem occurs, the circular vibrating screen will immediately stop working, its maintenance is more complex, must be given high attention. Reasons and countermeasures: 1. Long time metal fatigue or poor shaft material The shaft of the circular vibrating screen is a kind of metal material, which is subjected to the synthetic torque of torque and repeated impact force for a long time in the process of use. Under the action of long-term impact moment, the material inside the shaft will gradually fatigue, and fracture phenomenon will occur when the fatigue limit is reached. In addition, there are great differences in the torsional strength of different materials, if the material is poor, it will inevitably lead to low bending strength and fatigue limit, and it is easy to damage the phenomenon. Recommended in the purchase of circular vibrating screen, we must choose regular manufacturers, to ensure that the selection of reasonable parts. At the same time, it is strictly prohibited to start the circular vibrating screen with material, to ensure that the circular vibrating screen is only started without material; Strengthen daily maintenance and inspection, check the shaft regularly, once found bending, deformation and other phenomena, it must be replaced in time, to avoid damage in the process of transmission. 2. Excessive tension of triangle belt If the triangle belt tension of the circular vibrating screen is too large, it will cause the shaft to increase the bending moment, increase the synthetic moment, and increase the stress in the process of working with material significantly, even more than the allowable stress of the shaft, directly leading to the failure of the shaft. Therefore, it is necessary to adjust the tension of the triangle belt in time. It is suggested that the tension of the triangle belt should be reduced as far as possible under the premise of ensuring normal transmission. Of course, this phenomenon can be avoided by flexible connection. Two, the round vibrating screen transmission failure Vibrating screen is mainly composed of vibrator, screen box, support or suspension device, transmission device and other components. Once the transmission failure occurs, the circular shaker will not be able to use, seriously affect the normal production. At the same time, the shaker transmission fault is more complex, not easy to repair. Reasons and countermeasures: Common round vibrating screen transmission faults include coupling wear, coupling bolt fracture and protection cylinder cracking, belt pulley bearing seat bearing damage and belt tearing. To this end, circular vibrating screen operators need to regularly carry out preventive inspection of the transmission part, in the inspection process, especially need to pay attention to the longitudinal and transverse clearance of bearings, ensure that the spacing meets the requirements, but also need to add lubricating oil in time, to avoid serious wear; Check the bearing support every week, and add lubricating oil in time; To observe the operation of the circular vibrating screen, if there is an abnormal situation, it is necessary to stop running and check the system to avoid greater accidents. Three, the bearing temperature of the circular vibrating screen is too high High bearing temperature is also a common fault in the use of the circular shaker. Although the bearing temperature is too high, it will not have a direct impact on production immediately, but if the temperature is too high for a long time, it will inevitably have a great impact on the service life of the bearing. Therefore, technical personnel must also pay high attention to this problem. Reasons and countermeasures: 1, round shaker working time is too long A long time of work will inevitably produce a certain amount of heat, and then promote the volatilization of lubricating oil, and the volatilization of lubricating oil will further lead to an increase in friction, making the temperature rise. Therefore, it is necessary to arrange the running time of the circular vibrating screen reasonably, improve the operating efficiency of the equipment, avoid long-term continuous work, and can be closed in time when the circular vibrating screen is not needed. 2. Insufficient lubricating oil A lack of lubricating oil will inevitably lead to rising temperatures. It is necessary to check the bearings regularly and add lubricating oil to avoid high temperature caused by insufficient lubricating oil. Four, use the process of continuous oil Because most of the circular vibrating screen lubrication mode for eccentric shaft oil splash thin oil lubrication, this lubrication mode is difficult to fundamentally eliminate the phenomenon of oil dumping. Reasons and countermeasures: 1, vibration source rotation center line movement When the vibration source rotary center line of the circular vibrating screen movement, the vibration of the airtight is more serious damage, under the action of rotating centrifugal force, must cause the circular vibrating screen in the process of operation constantly appear oil phenomenon. 2, internal and external pressure difference The circular shaker will generate a lot of heat in the process of rotation, which will cause the pressure inside the vibrator to increase. Once the vent is blocked, the internal pressure will build up. When the internal pressure reaches a certain degree, it will cause damage to the vibrator, thus destroying its air tightness and producing oil dumping phenomenon. 3. The sealing gland is loose The bearing of the circular vibrating screen is installed in the bearing seat, and the sealing ring is installed on the sealing gland. If the height difference between the end face of the bearing seat and the end face of the bearing is too small, the positioning boss on the sealing gland loses its fixed positioning function, leading to the difference between the sealing gland and the bearing, resulting in the failure of the sealing effect of the sealing gland and the phenomenon of oil dumping. Check the vibrator regularly to prevent sliding of the vibrator; Choose the lubricating oil with higher viscosity to reduce the amount of oil dumping. Five, circular vibrating screen screen surface short service life The main factors affecting the aging of screen surface are the structure, material and tightness of screen surface. At present, many circular shakers use polyurethane screen surface. Reasons and countermeasures: On the one hand, polyurethane itself does not have high anti-aging properties. On the other hand, if the staff did not tighten the screen when installing the screen surface, that is, the screen surface is only fixed on both sides of the screen surface when installing the screen surface and the middle is not fixed, the screen surface and the bracket will constantly collide and friction in operation. Due to the direct contact between the screen surface and the material in the operation of the circular vibrating screen, when the screen surface is not tensified, in a loose state, the screen surface will produce secondary vibration, resulting in intensified wear of the screen surface, accelerate the aging phenomenon of the screen surface of the circular vibrating screen. In this regard, it is recommended to choose high-quality screen surface, often check whether the screen surface is loose or damaged, if loose, the screen surface should be tightened in time; If there is damage, the screen surface should be replaced in time. When replacing the screen surface, the tensioning plate on both sides should have the same and uniform rising force, and the screen surface must be tightened. The screen surface that has aged and cannot be used needs to be replaced in time to avoid more serious problems. The above is the round shaker five common problems, causes and countermeasures. In order to stable and efficient operation of equipment, in addition to the selection of equipment types in line with the beneficiation process, daily maintenance and maintenance is more important.

Slurry pump is mainly used to transport abrasive particles and viscous high concentration slurry in concentrator. After a long time of operation, most of the concentrator will more or less encounter a variety of slurry pump problems, not only affect the normal operation of the whole concentrator, but also damage the economic benefits of the concentrator. In daily operations, slurry pump prone to problems are seal failure and cavitation, if not timely found and timely control, will affect the normal operation of the pump. One, slurry pump seal failure At present, slurry pump commonly used shaft seal for packing seal and mechanical seal. 1. Slurry pump packing seal failure Slurry pump packing seal is through the injection of shaft seal water in the form of continuous injection of certain pressure water inside the packing, in order to prevent the leakage of the pump body slurry body. In daily maintenance or overhaul, it is necessary to adjust the screws at the pump packing gland to prevent the screws from screwing too tightly, so as to ensure the temperature and quality of the packing. If the screws are not screwed in place, under long operation, the screws loose seal will fail and the phenomenon of slurry leakage occurs. Or the sealing water control is not appropriate, easy to appear too much pressure or too small problems, and then cause the slurry pump seal failure internal leakage or external leakage problems. Note: The sealing form itself has great disadvantages, so in daily maintenance and repair, should be carried out in strict accordance with the maintenance process, strengthen training, should master the restraint standards of the pretightening parts; Shaft seal water injection should also be carried out according to the standard. 2. Mechanical seal failure of slurry pump Slurry pump mechanical seal is composed of at least a pair of perpendicular to the axis of rotation of the end face, in the fluid pressure and compensation mechanism with the role of elasticity and auxiliary seal, keep fit, and relative sliding, formed to prevent fluid leakage device. 1) When repairing, replacing and installing mechanical seals, if the compression amount is too large or too small and the sealing surface is not clean, the seal will fail in advance; 2) When the mechanical seal is installed or replaced, it is not installed as required, and the mechanical seal fails prematurely when the tool is used to knock on the seal or the auxiliary ring is not installed properly; 3) In the daily operation of slurry pump, such as the occurrence of evacuation, cavitation, pressure and other phenomena, will cause a large axial force, so that the dynamic and static ring contact surface separation, will also lead to seal damage. Note: The daily maintenance and replacement of mechanical seal of slurry pump should be strictly checked, the installation technical level of maintenance workers should be improved, and illegal operation should be eliminated. At the same time, strengthen the supervision and management of daily operation, so as to achieve correct operation and accurate spot inspection. Two, slurry pump cavitation When the internal surface pressure of slurry pump is lower than the gasification pressure of water, water will gradually turn into gas, and under the influence of the internal pressure of water is greater than the vaporization pressure of water, it will eventually become liquid, which is called cavitation. When the slurry pump is running, the impeller will continue to rotate, so that the energy of the liquid increases rapidly, and the pressure energy and kinetic energy rise rapidly. When the liquid pressure is equal to or less than the liquid vaporization pressure at this temperature, a large amount of steam or gas will overflow, and gradually many bubbles will appear, and enter the high-pressure area under the action of liquid flow, so that the crushed bubbles will be reunited under the influence of pressure difference. At the same time, the liquid particles will quickly close to the bubble direction, so the particles will collide with each other, and eventually form a huge force, so that the blade is impacted, and eventually accelerate the damage and aging of the impeller inside the slurry pump. After cavitation of slurry pump, there will be vibration and noise inside, and reduce the flow, head and power of slurry pump, so as to affect the overall performance of the pump, shorten the service life of the pump, and even affect the normal operation of slurry pump. Attention: operators need to pay high attention to cavitation phenomenon of slurry pump, and strengthen the test, management and maintenance of the pump. In addition, operators are required to master and reasonably use the method of NPSH ratio speed C and Thomas NPSH coefficient to calculate the NPSH of the pump, so as to ensure the smooth operation of the slurry pump. In the running of slurry pump is above problems, the slurry pump working condition is relatively poor, if you want to ensure the long-term stable operation, in addition to the daily maintenance to reach the designated position, also need to operating personnel for slurry pump has a comprehensive understanding and mastering the characteristics of the slurry parameters, can match adjustment according to the needs of operation, to ensure the normal operation of the slurry pump.

Belt conveyor is a kind of material transport equipment commonly used in concentrator at present, in which belt as a load bearing and transport device plays an important role. In the process of mineral processing, belt deviation is a common problem of belt conveyor, that is, in operation, the belt center line deviates from the center line of the conveyor and tends to one side. Belt deviation problem said big can be big, said small can be small, light belt "point injury", affecting the normal production line of the selection factory, heavy belt and rack violent friction so that the belt softening or even burning fire, the consequences can not imagine! Below, take you to understand the main cause of belt conveyor belt deviation, and give the corresponding solution. First, the installation error caused by the belt conveyor belt deviation The installation quality has an obvious influence on belt deviation, and the belt deviation caused by installation error is also difficult to deal with, mainly for the following reasons: 1, the belt joint is not straight, uneven, resulting in uneven tension on both sides of the belt, the belt to the side of the large tension. 2, the frame skew, including the center line of the frame skew and the high and low tilt on both sides of the frame, these two situations will cause the belt conveyor belt serious deviation, and it is difficult to adjust. 3, the rubber plate pressure on both sides of the guide groove is not uniform, resulting in inconsistent running resistance on both sides of the belt, thus causing the belt conveyor belt running deviation. Solutions: 1, in view of the belt joint is not straight, uneven situation, can adjust the rotation of the drum or change to the tension on both sides of the drum, if the situation can not improve after adjustment, need to reconnect the belt joint. When connecting the belt joint, be sure to ensure that the joint is peaceful. It is worth noting that in order to ensure the grooving of the belt out of the joint, it is recommended to nail the belt buckle in segments along the direction of the length of the grooved roller. 2, the center line of the conveyor is skewed, and the head and tail are adjusted to ensure that the center line of the head, tail and middle frame is in the same straight line. If the deviation in the middle part cannot be corrected, reinstall the rack. 3. The uneven pressure of the rubber plate on both sides of the guide groove is relatively simple, and the pressure of the rubber plate on both sides can be adjusted. Two, belt conveyor belt in operation caused by running deviation 1. Running deviation caused by adhesive material of roller and idler. After the belt conveyor runs for a period of time, due to the mineral material has a certain viscosity, part of the mineral powder will stick to the drum and roller, making the drum or roller local diameter becomes larger, causing uneven tensioning force on both sides of the belt, resulting in belt conveyor belt deviation. 2. Loose belt causes running deviation. After the adjusted belt runs for a period of time, due to the permanent deformation or aging of the belt stretching, the tension will drop, and the belt relaxation will cause running deviation. 3. Uneven distribution of ore material causes running deviation. If the belt conveyor belt does not deviate when idling, but deviates when heavy load is running, it indicates that the mineral material is not evenly distributed on both sides of the belt. The uneven distribution of ore material is mainly caused by the incorrect falling direction and position of ore material. If the ore material deviates to the left, the belt deviates to the right; And vice versa. 4. Deviation caused by vibration in operation. In operation, the belt conveyor will inevitably produce a certain mechanical vibration, the faster the speed, the greater the vibration, resulting in the belt conveyor belt deviation is more likely. For the belt conveyor, the vibration caused by the radial runout of the idler has a significant effect on the deviation of the belt conveyor. Solutions: 1. Adjust the idlers Belt conveyor in the process of operation, if the belt in the bearing section to the side of the deviation, indicating that the bearing roller group installation position and the center line of the verticality error, can be installed automatic adjustment roller group adjustment, generally every 20-30m installation of a group, but sometimes the effect is not good. Or use the adjusting eye on the stringer to adjust the position of the roller group, so as to solve the problem of deviation. Which side of the belt is biased to, which side of the idler group will move forward towards the running direction of the belt conveyor belt, or move back on the other side. Roller adjustment should start from the deviation point, the amount of adjustment of each roller should be less, and the number of adjustment rollers should be more, so that the effect of deviation adjustment is better. In addition, it is recommended to adjust only one side to avoid confusion. 2. Adjust the position of rotating drum and reversing drum Belt conveyor generally has more than 3 rollers, all roller installation position must be perpendicular to the belt conveyor length direction of the center line, if the deviation is too large will inevitably run off. If the belt conveyor belt in the head of the unloading roller run off, then the belt to which side run off will be which side of the roller shaft along the belt running direction of a short distance (by adjusting the roller bearing on both sides of the adjusting bolt to carry out); If the belt is deviated at the tail turning to the drum, the drum on the loose side should be moved forward along the running direction of the return belt (by adjusting bolts). If there is belt deviation in the driving drum and the reversing drum in the belt storage bin, it can be dealt with by referring to the adjustment method of the head unloading drum. 3. Clean the surface of the drum or replace the drum Roller surface processing error, or due to wear or surface adhesion caused by different diameter, the belt will run to the larger diameter of the side. 4, adjust the tension In addition to being perpendicular to the belt length direction, the redirection roller at the tensioning point should also ensure that its shaft center line is horizontal. When using hydraulic cylinder tensioning, the bearing seat of the tensioning drum should be shifted at the same time to ensure that the axis of the drum is perpendicular to the longitudinal direction of the belt. When the belt conveyor is running, if the belt tension is not enough, the belt does not run off when it is empty or a small amount of load. When the load is slightly larger, the phenomenon of running off will appear. It is necessary to choose the appropriate tensioning device to ensure that the belt has enough tension. 5. Rectify the blanking position at the transfer point Transfer point material at the location of the material has a greater impact on the belt running deviation, especially the two belt conveyor in the horizontal plane projection into vertical impact is greater, usually should consider the transfer point at the upper and lower two belt conveyor relative height. The lower the relative height is, the greater the horizontal velocity component of the material is, and the greater the side impact on the lower belt is. At the same time, the material is also difficult to center, so that the material on the belt is deflected, leading to the belt running. Therefore, the baffle plate can be added to block the material, change the direction and position of the material falling. The above is Yantai Sino Touch Mining & Construction Equipment Co.,Ltd summed up the main reasons for belt conveyor belt deviation and corresponding solutions. Sometimes, the reasons for the belt conveyor belt deviation are more complex, and the effect of a single method is not ideal, and a variety of adjustment methods may be needed.

Hydrocyclone is a more effective fine particle classification equipment in current mineral processing equipment. In daily production, there are more or less some equipment failures of hydrocyclones. If they cannot be found and solved in time, it is likely to lead to the shutdown of hydrocyclones. So, what are the common failures of hydrocyclones in daily operation? How do we solve these problems when we encounter them? This paper analyzes the causes and countermeasures from five common faults. 1. The ore pressure fluctuates greatly In the process of production, ore feeding pressure will affect the hydrocyclone capacity and grading granularity. Generally, the ore feeding pressure of the hydrocyclone should be kept stable according to the required pressure, and large fluctuation should not occur, otherwise it will damage the performance of the equipment and affect its classification effect. The large fluctuation of the pressure to the ore is usually caused by the drop of the pump tank level or air drag caused by the pump to the ore shortage, or the blockage of impurities into the pump. If the hydraulic cyclone after a long time of operation occurs to the mine pressure drop is mainly caused by pump wear. Solutions: 1. If the mine pressure fluctuation is caused by the drop of the pump tank level, it can be adjusted by increasing the level, or closing one or two hydrocyclones, or reducing the pump speed; 2. If the pressure fluctuation caused by pump blockage or wear, the pump needs to be repaired. 2. The hydrocyclone is blocked The blockage of hydrocyclone can be judged mainly by observing whether the overflow and bottom flow discharge of hydrocyclone are smooth. When there are more coarse particles in the overflow, the flow of the overflow and bottom flow decreases or the bottom flow stops, and the sand is discharged in columnar form, it indicates that the hydrocyclone has been blocked. In addition, if the hydrocyclone has a long time of violent jitter, it also indicates that the hydrocyclone is blocked. Solutions: 1. If the overflow and bottom flow both decrease, the inlet of the hydrocyclone may be blocked. At this time, the feed valve blocking the hydrocyclone should be closed, removed, and the blockage should be removed; 2. If the bottom flow is reduced or cut off, it is the bottom flow port blocked. At this point, the flange can be removed to remove debris in the bottom port. 3. In order to prevent clogging, facilities (such as chip removal screen) can be set in the feeding pool of the hydrocyclone group to prevent coarse materials and sundry objects. At the same time, the feeding pool should be emptied in time when stopping, so as not to cause clogging due to precipitation and high concentration when starting again. 3. Abnormal bottom flow concentration and discharge In the process of operation, the operator of the hydrocyclone should observe the discharge state of the bottom flow of the cyclone regularly, and detect the concentration and fineness of the bottom flow regularly. If the concentration of the bottom flow fluctuates or the "bottom flow pinching" occurs, it should be adjusted in time. Under normal working condition, the bottom discharge of hydrocyclone should be in the shape of "umbrella". If the concentration of the bottom flow is too large, the bottom flow is "columnar" or intermittent "block" discharge. Solutions: 1. The high concentration of bottom flow may be caused by the high concentration of slurry or too small bottom flow outlet. Appropriate amount of water can be added at the feeding place first. 2. If the bottom flow is discharged in an "umbrella shape", but the concentration of the bottom flow is less than the concentration required by production, it may be caused by the low concentration of the feed, and the feed concentration should be increased at this time. 3. "bottom flow clamping" may be caused by bottom port wear, bottom flow diameter is too large, overflow pipe diameter is too small, pressure is too high or too low, it is necessary to adjust the pressure, and then detect whether the bottom port wear or replace a smaller size of the bottom port, gradually debugging to normal production state. 4. Abnormal overflow concentration and fineness During the operation, the hydrocyclone operator also needs to check the overflow concentration and fineness of the hydrocyclone regularly. The increase of overflow concentration or "overflow running thick" is usually caused by the increase of ore concentration and the blockage of bottom flow port. Solutions: 1. If "overflow running rough" is found, check whether the bottom port is blocked first, and then check the concentration of ore feed, and then adjust according to the specific situation. If the bottom orifice is blocked, it is necessary to open the bottom orifice to clear the blockage. 2. If the overflow concentration is small and the fineness is fine, the pressure can be reduced or the concentration of ore feed can be adjusted at this time, or the requirements can be met by replacing the small sand nozzle. If the overflow concentration is large and the fineness is coarse, the requirements can be met by increasing the pressure and adjusting the ore concentration, or by replacing the large grit nozzle. 5. The sand nozzle is spray or rope Under normal circumstances, the hydrocyclone sand settling is discharged in umbrella shape, the sand settling Angle is between 10° and 20°, and the concentration reaches about 75%, which is the ideal working state of the hydrocyclone. If the nozzle is spray, too large spread Angle indicates that the nozzle size is too large. If the nozzle is rope shaped, it may be due to too high concentration of ore feeding, too small size of the nozzle, partial blockage of the nozzle or too low slurry density. Solutions: 1. When the nozzle is spray, it can be adjusted by replacing the small nozzle. 2. When the nozzle is rope shaped, the size of the nozzle can be appropriately increased to stop the operation of the cyclone to clean up the blockage. The above are the causes and countermeasures of common failures of hydrocyclones. In order to stable and efficient operation of equipment, in addition to the selection of equipment types in line with the beneficiation process, daily maintenance and maintenance is also particularly important. It is suggested that all mine owners consult professional hydrocyclone manufacturers when purchasing, and comprehensively consider the box selection process and beneficiation equipment, so as to further improve the working efficiency and economic benefits of concentrator.

high strength fire resistant mine support plastic grid,Minegrid for longwall,highwall,roof and rib support Mining geogrids introduction: Geogrid is knitted by polymer yarns with high strength, high modulus and low creep and coated with advanced technology. It is specially used as the substitute of metallic mesh for longwall face recovery and you do not need to weave the mesh frequently on site before the longwall stops. Polyester mesh is going to be lift at the position 15-25 meters away from the stopping line with winches and fixed pulley at one time. Mesh laying, lifting and advance is circulated with the share pass. Mesh application affords the technical innovation meaning to improve the longwall face recovery efficiency and security. polyester mesh is 3-6 m wide and 50-200 m long with tensile strength ranging from 100kn/m-800kn/m. Mesh with strength 800-1000kn/m for special projects can also be supplied. We will manufacture mesh based on the parameters of longwall faces. Mining geogrid application scopes: Longwall face recovery for roof support On both ends of longwall face for roof support Ultra-high drainage tunnel and old tunnel for roof support Gangue blocking,buffering and protection of the declining longwall faces Buffering and protection of the blast area Slice mining longwall faces Declining longwall faces for roof support Mining geogrid characteristics: Large square, flexible and light, strong tensile strength Simple and convenient construction Fire-resistant and antistatic Avoid frequent mesh transportation and weaving High safty and low labour Flexible production with different strength and specifications

We have manufactured one of the biggest reducer for the leaching tanks.the dimension is 1250*1350*900cm,used in 9M*9.5M leaching tanks,which is Gold CIL process. The worm gear and the main shaft is the major part of the reducer,which we used copper as the main material. Attached some photos for the reducer and worm gear,please let us know if you need reducers for any specification.

Doing mining field,we all known that EPCM is one of the most important service. E stands for Engineering, P stands for Procurement, C stands for Construction, M stands for Management. Yantai Sino Touch Mining & Construction Equipment Co.,Ltd is one of MINING EPCM supplier in China, and have done a lot of GOLD MINING EPCM all over the world,Such as Sudan,Ghana,Zimbabwe,Indonesia,Myanmar etc. With the coming of new year (2022),we have registered new website : www.miningepcm.com, with new email address : sinotouch@miningepcm.com. Also our another web still uses well: www.stmcgroup.com So we will use two website in the new year,www.miningepcm.com and www.stmcgroup.com, both of us can find us easily. Any inquiry about mining,especially gold mining,welcome to email us by sinotouch@miningepcm.com or WhatsApp: 008615106533168.