What are the structural characteristics of lead zinc ore ball mill?

The ball mill is composed of feeding department, discharging department, rotary department, transmission part (reducer, small transmission gear, motor, electronic control) and other main parts. The hollow shaft is made of steel castings, the lining can be replaced, the slewing gear is processed by casting gear hobbing, and the cylinder is inlaid with a wear-resistant lining plate, which has good wear resistance. This machine runs smoothly and works reliably.

The castings and liners are made of manganese steel with 12% manganese. The service life of the steel slag ball mill is greatly extended, and the normal production of the manufacturer is ensured while ensuring the normal operation of the machine!

Ball mill maintenance tips.

1. Always check whether important bolts such as anchor bolts, liner bolts, and grinding door bolts are loose.

2. The lubrication of each lubrication point should be checked at least once every four hours, and the temperature of the main bearing journal should not exceed 55, the transmission bearing should not exceed 55, and the reducer should not exceed 55.

3. Check whether there is water leakage, oil leakage and leakage in all seals, and deal with any problems in time.

4. Record the change of the current value of the motor frequently, and stop for inspection if there is an abnormal change in the current.

5. Whether the sound of the movement of the large and small gears is normal.

6. In order to find defects and remove faults in time to ensure the normal operation of the mill, in addition to daily maintenance, it is necessary to stop grinding regularly, carefully inspect the connection of important components (main bearings, hollow shafts, cylinders, gears, etc.) and the wear of friction surfaces, and properly deal with the defects checked, and make detailed records for reference when the mill is overhauled.

Lead-zinc ore ball mill.

Dry grinding or wet grinding.

(1) The main bearing adopts a large-diameter double-row spherical stick bearing, which replaces the original sliding bearing, which reduces friction and energy consumption, and the mill is easy to start.

2) It retains the end cover structure of ordinary mills, with large diameter inlet and outlet ports, and large processing capacity.

3) The feeder is divided into two types: combined feeder and drum feeder, with simple structure and split installation.

4) There is no inertial impact, the equipment runs smoothly, and the mill shutdown and maintenance time is reduced, and the efficiency is improved.

The beneficiation ball mill is the main equipment of mine beneficiation, which can separate and screen different ore materials in minerals and separate tailings. It is essential to improve the quality of the extracted material. It can process a variety of grinding materials, non-ferrous metal beneficiation, and new building materials.

The fineness of the selected ore is uniform and the quality is good.

1. It can provide mining mills of different specifications and types with diameters of 900-5000 to various metallurgical and chemical mining enterprises.

2. Replace sliding bearings with rolling bearings, saving more than 30% of electricity;

3. A forced ore discharge device is added at the discharge end, and the processing capacity is increased by 40%;

4. The mill barrel adopts measures such as automatic welding, ultrasonic testing, overall annealing, and one-time card loading and processing of large-scale professional machine tools to ensure accuracy and quality;

5. The mill adopts rare earth materials and new structural liners, adjusts the speed of the mill, and optimizes the gear design, thereby increasing.

the smoothness and service life of the mill;

6. The mill is installed and debugged before leaving the factory, so that the on-site installation is simple and convenient.

The working process of the ball mill is that the material enters the cylinder one after another in the hollow shaft of the feed end cover, and when the cylinder rotates, centrifugal force and friction are generated, so that when the medium (steel ball) and the ore rise to a certain height with the cylinder wall, it falls or falls down in a parabolic line with its own weight, and the grinding of the ore is mainly realized by the impact force when the crushing medium falls and the grinding effect during the movement, and the movement of the ore in the cylinder is realized by the pressure continuously fed into the ore. Finally, it is discharged from the hollow shaft of the discharge end cover During wet grinding, the ore is carried away by water, and during dry grinding, the ore is carried out by the air flow pumped out of the cylinder.

The rotation of the ball mill is that the motor drives the pinion to run through the reducer speed change, and the pinion meshes.

The rotation of the ball mill is that the motor drives the pinion to run through the reducer at variable speed, and the pinion meshes the large gear installed on the cylinder to rotate and decelerate, and the large gear rotates at an even speed to make the cylinder run and smelt.

The fine grinding ball mill is to dissociate the mineral monomer through grinding by sandwiching the minerals between the balls, and the coarse grinding ball mill is to drop and smash the minerals through the gravity of the balls to make the minerals initially dissociated.

How it works.

This machine is a horizontal cylindrical rotating device, outer edge gear transmission, two-bin, lattice type ball mill. The material enters the first bin of the mill uniformly by the feeding device through the feed hollow shaft spiral, which has a stepped lining plate or corrugated lining plate, which is equipped with steel balls of different specifications, and the cylinder rotates to produce centrifugal force to bring the steel balls to a certain height and fall, which has a heavy impact and grinding effect on the materials. After the material reaches coarse grinding in the first bin, it enters the second bin through a single-layer bin plate, which is inlaid with a flat lining plate and has a steel ball in it, and the material is further ground.

The powder is discharged through the discharge grate to complete the grinding operation.

Buying tips.

1. Don't identify a mechanical equipment manufacturer, and identify 2-5 manufacturers that you think are more powerful. (Focus on recommending machinery and equipment manufacturers Xingyang City, Henan Province Mining Machinery Manufacturing Factory) when the 2-5 manufacturers are determined, please open the main ** of these manufacturers, to see if the layout is clear, imagine how a powerful enterprise in the 21st century will not pay attention to brand promotion?

2. Through the first link, we can eliminate 2 manufacturers with poor strength. Then look at the remaining 3 manufacturers, this time it is necessary to look at the production capacity, delivery site, customer site, after-sales service, etc., to ensure that the vertical preheater manufacturer has the production strength.

3. The above two steps are just to save unnecessary time and cost.

4. The finalized manufacturer requires a customer site relatively close to its location.

5. Go to the machinery and equipment manufacturer Xingyang Mining Machinery Manufacturing Factory in Henan Province for a field visit, we will welcome you at any time.

6. This point is emphasized, we must pay attention to the problem of negotiation and prevent word games on the contract, which will cause you incomparable losses.

In order for the material to be effectively pulverized, the following principles must be followed when determining the gradation:

First of all, the steel ball should have a large enough impact force, so that the ball mill steel ball has enough energy to crush the granular material, which is related to the steel ball, and the steel ball should have enough impact times on the material, which is related to the steel ball filling rate and the average ball diameter. When the filling amount is constant, on the premise of ensuring sufficient impact force, the diameter of the grinding body should be reduced as much as possible, and the number of steel balls should be increased to improve the impact times on the material, so as to improve the crushing efficiency.

Finally, the material has enough residence time in the mill to ensure that the material is fully crushed, which requires the steel ball to have a certain ability to control the flow rate of the material.

The so-called two-stage ball matching method is to use steel balls with two different sizes and large differences in diameter. The rationale is that the gaps between the large balls are filled by small balls to maximize the bulk density of the steel balls. In this way, on the one hand, the impact capacity and impact number of the mill can be improved, which is in line with the functional characteristics of the grinding body, and on the other hand, the higher bulk density can enable the material to get a certain grinding effect.

In the two-stage ball matching, the role of the large ball is mainly to impact and crush the material, and the role of the small ball is to fill the gap between the large balls and improve the bulk density of the grinding body, so as to control the flow rate of the material and increase the grinding capacity; the second is to play the role of energy transfer, transferring the impact energy of the large ball to the material; The third is to squeeze out the coarse-grained materials in the void and place them in the impact area of the large ball.

The ball mill is the key equipment for crushing the material after it is crushed. This type of grinding machine is filled with a certain number of steel balls as grinding medium in its cylinder.

It is widely used in cement, Portland products, new building materials, refractory materials, chemical fertilizers, black and non-ferrous metal beneficiation and glass ceramics and other production industries, dry or wet grinding of various ores and other grinding materials. The ball mill is suitable for grinding all kinds of ores and other materials, and is widely used in mineral processing, building materials and chemical industries, and can be divided into two grinding methods: dry and wet. According to the different discharge methods, it can be divided into two types: lattice type and overflow type.

The ball mill is the key equipment for crushing the material after it is crushed. There are many types of high-fine grinding machinery widely used in industrial production, such as tubular ball mills, rod ball mills, cement ball mills, ultra-fine laminate mills, hand ball mills, horizontal ball mills, ball mill bearings, energy-saving ball mills, overflow ball mills, ceramic ball mills, lattice ball mills. The ball mill is suitable for grinding all kinds of ores and other materials, and is widely used in mineral processing, building materials and chemical industries, and can be divided into two grinding methods: dry and wet.

According to the different discharge methods, it can be divided into two types: lattice type and overflow type. According to the shape of the cylinder, it can be divided into four types: short drum ball mill, long drum ball mill, tube mill and cone mill.

The ball mill is composed of a horizontal cylinder, a hollow shaft and a grinding head for the inlet and outfeed, the cylinder is a long cylinder, the cylinder is equipped with a grinding body, the cylinder is made of steel plate, there is a steel lining plate and the cylinder is fixed, the grinding body is generally a steel ball, and is loaded into the cylinder according to different diameters and a certain proportion, and the grinding body can also be used in steel sections.

According to the particle size of the grinding material to be selected, the material is loaded into the cylinder by the hollow shaft at the feed end of the ball mill, when the ball mill cylinder rotates, the grinding body is attached to the cylinder lining plate due to the action of inertia and centrifugal force, the effect of friction, so that it is attached to the cylinder lining plate and is taken away by the cylinder, when it is brought to a certain height, it is thrown down due to its own gravity, and the falling grinding body crushes the material in the cylinder like a projectile.

There are two grinding methods to choose from in the ball mill according to the ore discharge method in the beneficiation, namely dry grinding and wet lattice grinding. In terms of grinding mechanism, the ball mill adopts a double-chamber grinding design, the first bin is equipped with a corrugated liner or stepped liner and a large-size steel ball, which is intended for rough grinding, and the second bin is equipped with a flat lining plate and a small-sized steel ball, for the purpose of fine grinding, and the beneficiation standard is reached after double-bin grinding.

1. ***: The ball mill is grinding because of its function, and the main power of grinding is friction, which will produce strong friction on the equipment during operation, so the ball mill has high requirements for quality. The ball mill parts of Zhengkuang Machinery are all made of high-quality originals, and the main lining plate and grinding body are made of special materials with high wear resistance, which not only ensures the quality of the grinder, but also prolongs the service life of the ball mill.

2. Energy saving: The ball mill is a large-scale production equipment, and the blind pursuit of high efficiency will produce extremely high energy consumption, which will bring a heavy economic burden to the ball mill users. The ball mill of Zhengkuang Machinery focuses on the balance of high efficiency and low energy consumption, using the ratio of drive power and energy consumption to save energy consumption, while ensuring efficiency, killing two birds with one stone.

3. Strong closure: the ball mill is a fine work equipment in mineral processing, so dust has become an environmental protection item that must be paid attention to. In the design of the ball mill, the engineer of Zhengkuang Machinery adopts a mosaic dislocation combination method at the connection, so that the connection between different components forms a negative pressure and closed conveying system to ensure the tightness of the closure and reduce the damage of dust to the outside world.

Xingyang Juxin Machinery summarizes several factors that affect the quality of ball mills:

1) Mill productivity. There are many factors that affect the productivity of the mill, such as: the type, specification and speed of the mill, the nature of the material to be milled, the nature, size, shape and filling rate of the grinding medium, the extension efficiency during closed-circuit grinding, the feed particle size and discharge fineness, and the operating conditions.

2) Mill speed. The speed of the cylinder of the mill is generally 30-14r min, the diameter of the cylinder is large, the rotation speed is low, and vice versa. The ratio of the working speed of the mill barrel to its critical speed is called the rotation rate, which is generally 76%-88%.

3) The filling rate and loading amount of the mill medium. When the mill is running, the ratio of the area occupied by the medium on the cylinder section to the area of the section is called the filling rate of the mill. In actual work, the filling rate of wet lattice mill is generally 40%-50%, the filling rate of overflow mill and rod mill is generally 35%-40%, and the filling rate of dry lattice mill and tube mill is generally 25%-35%.

4) Mill power. Mills of different types and specifications will be equipped with electric motors of appropriate power. The motor itself will lose about 10%, the mechanical friction loss will be about 10%-15%, and the power really used to make the grinding medium and material move to produce crushing and grinding is about 75%.

The productivity per unit volume of the mill, that is, the ore processing capacity, is proportional to the square root of the diameter of the mill, and the size of the diameter of the mill directly determines the load pressure of the mill material and the impact force of the rigid ball. Therefore, the larger the diameter of the mill, the greater the pressure on the ore and the impact force of the steel balls, and the higher the ability to process the ore. At present, the development of newly designed and manufactured grinding machines abroad to large-scale (large diameter) is to take advantage of this characteristic.

There are many factors involved in the grinding process. To sum up, there are three main aspects: grinding machine equipment structure, ore properties, and operating conditions.

However, for the production site, the equipment is basically fixed and should be regarded as a constant factor, only the nature of the ore and the operating conditions of the quantity and quality of the product of the over-grinding operation have a decisive impact. In order to ensure the quality of the grinding product, the operator must adjust the ore feed rate at any time according to the changes in the ore properties (particle size, hardness, etc.), and at the same time stabilize the various variable operating conditions at the most suitable level.

The type and material of the liner can affect the throughput and quality of the grinding. If the type of liner is not selected properly, the processing capacity will be reduced and the grinding fineness will not meet the requirements.

The material of the liner also affects the amount of ore processed and the fineness of the product. If the manganese content of the lining material is small, it appears soft and not wear-resistant, which also affects the impact force and grinding and stripping effect of the steel ball on the ore to a certain extent. This information is provided by.