What is the purpose of cement ball mill? What is a ball mill? What is it for?

The cement ball mill is mainly used for grinding finished products and raw materials in cement plants, and is also suitable for grinding various ores and other grinding materials in metallurgy, chemical industry, electric power and other industrial and mining enterprises.

Extension of knowledge points:

Working principle of cement ball mill:

The material enters the first bin of the ball mill uniformly by the feeding device through the feeding 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.

The ball mill is the key equipment for crushing the material after it is crushed. Ball mills are widely used in cement, silicate products, new building materials, refractory materials, fertilizers, ferrous and non-ferrous metal beneficiation and glass ceramics and other production industries, for dry or wet grinding of various ores and other grinding materials.

Red Star specializes in the production of ball mills, providing ball mills, ball mills, and ball mills.

Ball mill is mainly used in mining, building materials, chemical industry, metallurgy and other industrial plants and mines, when the material required by the process is crushed to a certain specification, and then the key equipment for secondary crushing and grinding, to achieve the quality of the grinding of process materials in various factories and mines.

Ball mill is widely used in cement, ball mill is the key equipment for ultra-fine grinding after the material is crushed.

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.

Ball mills are widely used in cement, silicate products, new building materials, refractory materials, 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.

Summary. What are the requirements for the production of white cement ball mill The manufacturing requirements for the barrel of the ball mill are as follows: 1. Requirements for welding:

In order to reduce stress concentration, the longitudinal weld should be staggered by an integer multiple of 100 when the steel plate is arranged, and the minimum spacing of the circumferential weld is not less than 600mm; The distance between the weld and each bolt hole is not less than 75mm; 2. Requirements for manholes, blanking holes and bolt holes; The holes on the cylinder are all carried out by mechanical processing, so as to avoid the use of flame melting, and if the flame is used, the machining allowance must be left to relieve stress; 3. The shape and position tolerance of the cylinder should be implemented according to the JC334-94 standard. 4. The overall annealing of the cylinder: the annealing of the cylinder is the most prominent manufacturing feature of our company, which has the most obvious advantages, and the elimination of welding stress is the most reliable and thorough, but the cost is high.

What are the requirements for the production of white cement ball mill The manufacturing requirements of the ball mill cylinder are as follows: 1. Welding requirements: the cylinder is the largest force and works under alternating stress, in order to reduce the stress concentration, the longitudinal weld should be staggered by 100 integer times when the steel plate is arranged, and the minimum circumferential weld spacing is not less than 600mm; The spacing between the weld and the bolt hole is not less than 75mm; 2. Requirements for manholes, blanking holes and bolt holes; The holes on the cylinder are all carried out by the method of mechanical processing, and the flame melting cutting is avoided to be opened, and if the flame melting is used, the machining allowance must be left to eliminate the stress field beam; 3. The shape and position tolerance of the cylinder should be implemented according to the JC334-94 standard.

4. Late annealing of the cylinder: Annealing of the cylinder is the most prominent manufacturing feature of our company, and its advantages are the most obvious, and the elimination of welding stress is the most reliable and thorough, but the cost is high.

What material is used in the inner cylinder of the rubber draft in and out of the hollow shaft, how to fix it, and the requirements for grinding body pebbles, please give guidance and answers. Thank you.

It contains a variety of lining materials, such as chromium-molybdenum alloy steel, high-chromium cast iron, rubber, manganese steel, polyurethane and other materials, and the shapes are not the same, there are corrugated, convex prismatic, and angular spiral shapes and so on. "Liner material" can play a role in maintaining the grinding cylinder, and also has the role of promoting the grinding medium - ball and breakage, as well as the role of grinding Li Zhengheng. Zen Ash.

Refers to the material requirements for the production of white cement.

White Portland cement is the most important variety of white cement, which is a kind of Portland cement made of limestone, clay and silica with low content of iron oxide and other non-ferrous metal oxides as the main raw materials, calcined and quenched into cement clinker by calcining and quenching at high temperature, adding an appropriate amount of gypsum (a small amount of white limestone can also be added instead of comma clear part of the clinker), and grinding in a mill equipped with stone (mold or wear-resistant metal) lining plate and grinding body.

Ball mill is a traditional material grinding device, which has a history of more than 100 years. The ball mill is the main equipment for processing solid materials into grinding. It is widely used in mineral processing, metallurgy, chemical industry, cement, ceramics, construction, electric power, pharmaceuticals and national defense industry.

Dry or wet grinding of a wide range of ores and other grindable materials.

Ball mill commonly used in mineral processing.

There are mainly two types: lattice type and overflow type

Lattice type ball mill application:The lattice type belongs to forced ore discharge, the grinding time of the material in the ball mill barrel is relatively short, and the discharge particle size is relatively coarse, which is generally suitable for a period of grinding operation.

Overflow Ball Mill Applications:The overflow discharge mode is more passive, the material is grinding in the cylinder for a relatively long time, and it is easy to produce over-grinding phenomenon, and its discharge particle size is relatively fine, generally smaller, suitable for fine-grained grinding, and is commonly used in the concentrate re-grinding stage.

The principle of the ball mill

The working principle of the ball mill is that the material is fed into the ball mill barrel through the hollow shaft diameter, and the ball mill cylinder is driven by the motor to drive, and the material and the medium in the cylinder are rotated at a certain speed under the action of the cylinder, and the force contained in it includes gravity, centrifugal force and friction, when the grinding medium reaches a certain height with the cylinder, when the self-weight is greater than the centrifugal force, it will fall or roll down from the inner wall of the cylinder, and the gravitational potential energy is converted into kinetic energy when falling. Finally, the steel ball will collide with the ore at a certain final velocity, and the ore will be crushed by the impact force, and the material that has been broken and reached the qualified particle size will be discharged through the ore discharge port.

The running trajectory of the ball mill is related to its running speed, and the running speed can be divided into three operating modes: high-speed, normal and low-speed, and the states presented by it are centrifugation, throwing and leaking.

Ball mills are generally composed of cylinders, liners, feeders, dischargers, hollow shafts, bearings, transmissions and lubrication systems. In the ball mill, when the cylinder rotates at a certain speed around the horizontal axis, the medium and raw materials installed in the cylinder under the action of centrifugal force and friction, as the cylinder reaches a certain height, when their own gravity is greater than the centrifugal force, they will fall or roll down from the inner wall of the cylinder, and crush the ore due to the impact force. At the same time, in the process of ball mill rotation, the sliding movement of the grinding medium between each other also has a grinding effect on the raw materials.

Ball mills are used for fine grinding operations, but they are also often used for coarse grinding operations. Ball mills are widely used in various industrial sectors (except for iron materials), mainly used in mineral processing industry, metallurgy, chemical industry, building materials, silicate industry, refractory, electric power, cement and other industrial sectors to grind hardness of ore, coal or other grinding materials.

Energy-saving ball mill This ball mill has changed the original mill structure, so that the machine body and chassis are integrated, and can be placed on the foundation plane at one time when installed, and the spindle adopts double row spherical roller bearings to reduce energy consumption by 30, improve particle size, and increase processing energy by 15-20.

Energy-saving 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, which can be divided into dry and wet grinding methods.

According to the different ways of ore discharge, there are two kinds of cement ball mills: lattice type and overflow.

1) Ordinary cement ball mill: Most of the ordinary cement ball mill is used in the circle flow grinding system, which is characterized by high grinding efficiency, large mill output and low power consumption, especially when grinding slag cement, the performance is more prominent. In general, mill output can be increased by 15-20%, power consumption can be reduced by about 10%, in addition, the finished product temperature can be reduced by 20-40%, and the fineness of the product can be easily adjusted.

2) High-fine and high-yield cement ball mill: High-fine and high-yield cement ball mill is mainly used in open-flow grinding system. It is characterized by simple system equipment and technological process, low investment and small plant area; In the structure of the mill, the advanced special compartment device for internal powder selection is adopted, the activation device is added to the fine grinding bin, and the grinding tail has a special discharge grate plate, which minimizes the size of the grinding medium in the grinding bin, greatly improves the grinding efficiency, and achieves the purpose of high output and low energy consumption.

Generally, the cement ball mill is a continuous mill, the lining material is cast steel, and the grinding medium is also cast steel.

Factors affecting the output of ordinary cement ball mills.

1.The amount of filling of the grinding medium.

2.The amount of feed and the size of the feed.

The cement ball mill has been used for a long time, and the steel ball becomes smaller, and there is a large amount of cement surface on the steel ball and the steel section, which sticks to the steel ball, and effectively cleans the solution.

During the shutdown of the cement mill, it is necessary to rotate the grinding regularly, otherwise the agglomeration will be difficult to deal with.

There is no need to clean the cement face of the steel ball being used.

If it is poured out and re-matched, there is no need to clean it up, it can be used when poured in.

The use and application principle of cement ball mill in aerated concrete equipment: In aerated concrete equipment, cement ball mill is mainly used for grinding limestone, gypsum, sand, slag and other materials. Only after these equipment materials have been ground and evenly stirred can they be mixed.

Only these mixed concrete meet the standards of the work. Aerated concrete crushing production is an important process in grinding, and it is one of the working machines that consumes the most electrical energy. Cement ball mill is a long cylinder simplification composed of simplified horizontal simplified, hollow shaft and grinding materials, etc., grinding cylinders, bottle manufacturing steel, coated outer steel and simplified sleeves, steel general grinding ball system, according to different pipe diameters, a certain proportion of load, the role of steel can also be different, which can be selected with abrasive particle size, material fuel by the hollow shaft in the cylinder body at the end of the month, energy-saving ball mill simplified body rotation when plant grinding due to the influence of inertia and centrifugal force, friction, it is close to the cylinder liner after leaving the time, A certain height is taken, because of its own gravity, the ball mill rotates, and the objects at the height fall due to the centripetal force, so as to achieve the effect of crushing.

In the process of rotation of the cement ball mill cylinder, the grinding body also has the phenomenon of slipping, in the process of sliding down the material to grind, in order to effectively use the grinding effect, the grinding body cylinder is separated into two sections with a partition plate, that is, it becomes a double bin, when the material enters the first bin is crushed by the steel ball, when the material enters the second bin, the steel end grinds the material, the material that is finely ground and qualified is discharged from the hollow shaft at the discharge end, and the material with small feed particles is ground finely, such as sand No. 2 slag, coarse fly ash, and the mill barrel can not be provided with a partition. Become a single silo mill.

In the process of cement production, due to the influence of factors such as moisture, particle size, quality (clinker grindability, temperature, strength), cement mill condition and post operation, the cement quality will fluctuate greatly, and the cement production cost will have a greater impact. In April 2007, through diagnosis, standardize the operation of post personnel, under the premise that the amount of mixed material does not decrease, the average output of cement mill is stable at more than 15t h, and the average specific surface area of grinding cement is stable at more than 370m2 kg, and good results are obtained. The cement ball mill consists of a two-stage separation system consisting of a recirculation box, a recirculation pump and a cyclone to adjust the fineness and concentration of solid particles in the product slurry; All tanks, pumps, pipelines, and agitators of the cement ball mill system are protected by glue or anti-corrosion materials, and the joints of the pipe fittings are sealed with mechanical sealing materials.

The cement ball mill equipment has the effect of selective crushing and screening, which greatly reduces the content of small slag in the slurry, which reduces the wear and tear of the conveying equipment (such as mud pump, pipeline, etc.); In addition, under the premise of not affecting the quality of the cooked department, the 4900-hole sieve residue can be relaxed from 8 lo% to 13-15%, and the 900-hole sieve residue can be relaxed from 3. Therefore, the output of cement ball mill can be greatly increased. In addition, the ball mill has good adaptability to the hardness and particle size of the material, and is not too sensitive to the moisture content of the material, so it can appropriately reduce the moisture content of the slurry, which saves the electrical consumption of the cement ball mill and the rod mill, and at the same time reduces the heat consumption of calcination.