mb5x pendulum roller grinding mill

mb5x pendulum roller grinding mill

Based on more than 30 years of field test data accumulation and experimental analysis, SBM has developed the fifth generation pendulum suspension grinder MB5X grinder. All non-combustible and explosive brittle mineral products with mohs hardness below grade 7 and moisture content below 6% can be ground by the mill.

After the hammer crusher (or jaw crusher) has broken the large piece of material into smaller pieces, the elevator carries the material to the hopper. Then, the broken material is fed into the grinding chamber of MB5X pendulum roller mill by electromagnetic vibration feeder. After grinding, the material is blown to the powder concentrator by airflow for grading. Under the action of the impeller of the powder selector, materials that cannot reach fineness will be sent back to the grinding room for regrinding, and qualified powder will be collected by the cyclone dust collector and discharged from the bottom as finished products. The airflow will then enter the fan with the return duct on top of the cyclone. The system USES a closed loop and operates under positive and negative pressure.

MB5X pendulum roller mill l roller is lubricated by thin oil. This is a domestically launched technology that is maintenance-free and easy to operate. Thin oil lubrication is oil bath lubrication, not as convenient as grease lubrication, because do not need frequent lubrication, and lower maintenance costs.

There is no spatula cylinder in the grinding room of MB5X pendulum roller mill, so the ventilation area is large and the air conveying resistance is small. In addition, the use of large diameter roller directly improves the efficiency of the mill.

The vibration damage of MB5X pendulum roller mill can be effectively reduced by the elastic worm case damping structure. The special elastic structure between the volute and the engine base, combined with the setting of the rubber damping pad, can directly avoid the influence of the vibration of the engine base on the running stability of the separator, and completely eliminate the problem of the broken volute. And the central engine due to the vibration of the engine base.

feeder machine types | how to choose a feeder equipment | m&c

feeder machine types | how to choose a feeder equipment | m&c

Feeder machine is a kind of feeding equipment which can feed bulk and granular materials from the stock bin to the receiving devices evenly, regularly and continuously. Which has been widely used in cement, mining, metallurgy, coal, chemical industry, ceramics, grain, electric power and other industrial and mining enterprises.

Feeder machine is the most ideal equipment to realize production automation. The feeder machines can not only be used with electronic scales or microcomputers, but also can work alone for feeding. The common types of feeder machine are as follows:

When vibrating feeder is working, the vibrating motor drives the eccentric shaft or eccentric block to drive, and the centrifugal force produced by the rotation of the eccentric block is used to make the screen box and vibrator move in a continuous circle or approximate circle, and the bulk and granular materials from stock bin are fed into the receiving device uniformly, regularly and continuously .

Vibrating feeder is widely used in crushing and screening equipment of coal mine, mineral processing, chemical industry and mills etc. Usually suspended under the stock bin by a spring, the feeder trough can be arranged horizontally or with an angle of no more than 10.

Belt feeder is the same as that of belt conveyor in structure, but the roller space of belt feeder is smaller to bear the pressure of materials in the silo. Guide baffles are arranged on both sides of the conveyor belt to prevent spreading. The belt speed < 0.5 m/min. The feed rate can be adjusted by changing the belt speed or the height of the outlet baffle.

Belt feeder has the advantages of large bearing capacity and short length, so it is also a kind of economical feeding equipment. The feed ore size suitable for belt feeder is less than 350mm and the belt speed is below 0.3m/s generally. Belt feeder is mainly used in ore buffer bin discharge after coarse crushing, ore feeding of medium/fine crushers or screening equipment, discharge of powder bin.

Plate feeder is suitable for short distance transportation and can bear heavy working load, including 3 types: heavy, medium and light. The maximum ore size of heavy plate feeder can reach more than 1000mm. The plate feeder is mainly used for coarse crushing ore feeding, ore buffer bin drainage after coarse crushing, and coarse ore heap discharge.

Plate feeder can be installed horizontally or tilted, with a maximum upward inclination of 20. It is suitable for materials with loose density less than 1200kg/m, block weight less than 140kg and temperature below 350.

Chute feeder is suitable for the ore feeding of medium-sized materials, the maximum particle size can reach 450mm, and the ore feed can be adjusted by adjusting the eccentricity of the eccentric wheel of the transmission mechanism. The width of the trough body of the chute feeder is 2-2.5 times of the maximum particle size of the ore feed, which is mainly used for the feeding of jaw crusher and bulk lime in the preparation of lime milk.

Pendulum feeder is suitable for short distance transportation and high specific gravity materials with a particle size of 35 100mm. Pendulum feeder is not suitable for conveying dry powder materials, otherwise dust pollution and outlet blockage will occur.

Pendulum feeder is mainly used as the feeding equipment of the belt conveyor when collecting ore in the ball mill, and the feed particle size is generally less than 25mm, which belongs to intermittent feeding.

Disk feeder is a kind of continuous volume feeding equipment composed of driving device, feeder body, metering belt conveyor and metering device, which makes use of the fluidity of materials. The material is scraped from the container to the receiving equipment through a rotating disc and an adjustable scraper, which is suitable for all kinds of non-viscous and not very good fluidity -20mm fine materials.

Screw feeder can be installed in the lower part of the silo and is suitable for horizontal, vertical or inclined conveying. The material flow is controlled and adjusted uniformly and continuously by changing the spiral speed. The screw feeder is easy to feed non-viscous powdery, granular and small particle materials evenly to the receiving equipment from the silo and other storage equipment.

Screw feeder has the features of conveying, sealing, homogenizing and stirring. It is a common equipment in cement raw meal homogenization and silo sealing feeding. There are many types of screw feeder, such as solid screw, belt screw, variable pitch screw, conical screw and so on.

Impeller feeder is composed of a group of blades installed on the shaft and the outer sealing shell. Driven by the motor, the impeller on the spindle is driven by the reducer to drive the material from the upper silo through the impeller groove to feed out evenly. The feeding capacity is changed by adjusting the speed of the impeller.

Scraper feeder is composed of many scrapers fixed between two chains with a certain distance between them. The scraper moves along the slot bottom, which can be used for horizontal transportation or inclined transportation. When transporting upward along the incline, the inclination of the material layer shall not exceed 25 , and when transporting downward, the inclination shall not exceed 20 .

The working principle and traction parts are the same as the scraper conveyor. Scraper feeder can realize closed and multi-point feeding, which is suitable for materials with less powder or granule, grindability and stickiness.

Electromagnetic vibratory feeder uses the electromagnetic vibratory exciter as the vibration source to drive the hopper, which has the features of small amplitude, high frequency, slow conveying speed. Electromagnetic vibratory feeder is a new type of quantitative feeding equipment, which can meet the requirements of continuous production.

The maximum ore feeding particle size of electromagnetic vibratory feedercan reach 500mm, it is widely used for ore feeding of medium and fine crushing equipment and screening equipment, ore discharge of ore bin, etc.

tailings dry stacking, a new tailings processing method! - xinhai

tailings dry stacking, a new tailings processing method! - xinhai

The tailings are one of the products of separation operation in mineral processing. Due to the low content of its useful components, the tailings cannot be further separated under the current mineral processing technology and economic conditions. After the ore is ground into the very fine pulp, the ore powder less than 0.075mm generally accounts for 50%-70%, and some of them are even finer, the pulp concentration is generally around 15%-40%. If it is discharged into a tailings pond, there will be a large amount of water in addition to the ore, basically equivalent to a reservoir. The accumulation of tailings can not only cause environmental pollution, but also easily lead to tailings dam break, bringing hidden safety risks. Therefore, how to discharge and stockpile the tailings has become an important problem.

Tailings wet discharging is a kind of traditional tailings wet stacking method. The tailings slurry directly through the pipe into the tailings without any treatment. Through the plain sedimentation, the upper water of the tailings pond is recycled. And the tailings pond is closed when the tailings pond meets the requirements of the load elevation, then the soil and water conservation, vegetation restoration and land reclamation can be carried out above the tailings pond. The traditional tailings wet discharging and storage exist the hidden danger, the dam construction, use, maintenance, management need a lot of manpower, material resources and financial resources. Any slight negligence will lead to a major safety accident and property loss. Therefore, the initial investment in the tailings pond is very higher.

The tailings dry stacking is a new tailings processing method in recent years. After the multistage concentrating, the tailings pulp is sent to a series of high-efficient dewatering equipment, and slag with low water content, easy to curing and stored is formed. The slag can be used as the building materials, or transferred to the fixed location for dry storage. The tailings dry stacking technology can relieve the capacity pressure of tailings pond storage, reduce the safety hidden danger of tailings pond and increase the means of tailings reprocessing, which is a kind of tailings processing technology to realize the green mine.

In general, the tailings dry stacking technology is mainly composed of slurry pump, hydrocyclone, efficient improved thickener, high-frequency dewatering screen, chamber filter press and slurry conveying device.

The tailings are transported to the hydrocyclone for concentration and classification by the slurry pump, the sand setting of the hydrocyclone enters into the high-frequency dewatering screen for dehydration, and the overflow enters into the efficient improved thickener for concentration. The coarse tailings treated by the high-frequency dewatering screen are transported to the material yard for stockpiling by the belt conveyor. Among them, the tailings after concentrated by the efficient improved thickener are transported to the filter press by slurry pump for filtration, and the filter cake of the filter press is self-discharged to the belt conveyor, and the fine tailings are transported to the material yard for storage.

The hydrocyclone is mainly composed of cylinder, cone, overflow port, bottom flow port and feed port. The hydrocyclone is used for the tailing's concentration, dehydration and separation, which is featured with simple structure, high efficiency and low investment. In the tailings dry stacking, the hydrocyclone used in the classification of tailings pulp can effectively improve the sand settling rate, improve the classifying efficiency and ensure the sand settling concentration.

The structure of high-frequency dewatering screen includes the vibration motor, screen, dewatering screen frame, support and rubber spring. The high-frequency dewatering screen is new and highly efficient dewatering equipment with a simple structure, easier maintenance and simple operation. It can not only meet the dewatering and classification requirements of fine minerals, but also be widely used in the dewatering operation of fine tailings because of its large handling capacity and good dewatering effect. In the tailings dry stacking, the high-frequency dewatering screen adopts the unique sieve plate and the motor with high-frequency vibration, which not only makes the pulp particles not easy to pass through the sieve hole, but also obtain the higher dehydration efficiency. Finally, the water content of dry pile tailings are less than 15%.

The efficient improved thickener is mainly composed of a circular concentrator and rake mud scraper. It is suitable for fine and ultra-fine materials, and its processing capacity is much higher than that of conventional thickener. In the tailings dry stacking, adopting the flocculant concentration technology can greatly increase the settling velocity and solid flux of the fine tailings, finally, obtain a higher underflow concentration.

The chamber filter press is mainly composed of five parts: the rack, automatic drawing board, the filtration, the hydraulic pressure and the electrical control. The chamber filter press is widely used in tailings dry stacking by relying on its positive pressure, high pressure, strong dehydration, the low water content of filter cake and low energy consumption. The filtrate of tailings treated with the chamber filter press is clear and transparent, which can meet the requirements of direct discharging of environmental wastewater, and the moisture content of dry slag after filtration can reach below 8%, which greatly reduces the transportation cost of tailings and the risk of the dry heap of tailings.

In the tailings dry stacking, the slurry pump is an essential conveying equipment of tailings slurry, which is used to transport the slurry to hydrocyclone and chamber filter press. The liner of the slurry pump adopts wear-resisting rubber, which not only enhances its wear-resisting performance, but also ensures that cyclone and filter press are in a good working state and prolong the service life of the slurry pump.

The tailings dry stacking can not only save the construction cost and routine maintenance cost of the traditional tailings pond, but also make full use of the backwater, greatly save the occupied area and the reclamation treatment cost after the tailings pond is closed.

In general, the production cost of tailings dry stacking is higher 3% - 10% than the tailing's wet discharging, but tailings dry stacking saves more than 30 in the early stage of the tailings storage facility on the construction costs. In addition, during the comprehensive recovery and utilization of tailings in the later stage, the dry heap tailings are easier to be mined and utilized than the tailings slurry in the tailings pond, which is in line with the current national policies on tailings discharge.

With the release of the national "green mine" standard, the tailings dry stacking has shown great advantages in economy, environment and safety, which has become an important choice for tailings processing in the future. In the practice, it is suggested to choose the suitable tailings dry stacking technology according to the tailings scale, investment, and customize the equipment used in the tailings dry stacking.

global pendulum feeder market research report 2021-2025

global pendulum feeder market research report 2021-2025

January 2021 | 152 pages | ID: GEDC270C7962EN 9Dimen Research

electromagnetic vibrating feeder equipment | environmental

electromagnetic vibrating feeder equipment | environmental

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By Great Wall Company based in Zhengzhou, CHINA. from Grinding Mill Product line

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