Classification and maintenance procedures for dry ball mills???? thanks

Ball mills include mineral processing ball mills, energy-saving ball mills, cement ball mills, iron processing ball mills, steel slag ball mills, aluminum ash ball mills, etc

Ball mill. It 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 dry and wet grinding methods. According to the different discharge methods, it can be divided into two types: lattice type and overflow type.

Ball mill grading grinding process.

1) Ball mill and rod mill process.

For beneficiation, one or two stages of grinding can economically grind the ore to any particle size required for beneficiation. For grinding of more than two stages, it is usually decided by the selection of other requirements in the progress stage.

Compared with the first and two stages of the process, the primary advantages of the first grinding process are: less equipment, low investment, simple operation, no downtime of one grinding section will affect the operation of another grinding section, and less strike loss. However, the grinding mill has a wide feeding particle size, and it is difficult to load balls reasonably, so it is not easy to obtain finer final products, and the grinding efficiency is low.

When the maximum particle size of the final product is required to be 60% 79%-200 mesh), a grinding process is generally used. In a small plant, in order to simplify the process and equipment, a grinding process can also be used when the grinding fineness is required to be 80%-200 mesh.

The outstanding advantage of the two-stage grinding is that it can obtain a finer product, which can be coarsely ground and finely ground in different grinding stages, especially suitable for the stage**. In large and medium-sized plants, when the grinding fineness is required to be less than 80%-200 mesh), it is more economical to choose two-stage grinding, and the product particle size composition is uniform, and the over-damage phenomenon is less.

According to the different connection methods of the first stage mill and classifier, the two-stage grinding process can be divided into three types: the first stage of the open circuit.

The second section is fully closed; The first section is partially closed, and the second section is always closed.

2) Self-grinding process.

There are two types of self-grinding processes: dry grinding and wet grinding. Concentrators mostly use wet grinding. In order to improve the grinding power of refractory particles in self-grinding and increase the grinding power, a small number of steel balls are added to the autogenous grinding machine, which is called semi-autogenous grinding.

Self-grinding is often combined with grinding equipment such as fine crushing, ball milling, gravel grinding, etc., and can be composed of many technological processes according to its coupling method.

Here's how to perform maintenance and if it feels appropriate, you can do it. Henan Bailing machine ****.

1.Sealing of inlet and outlet materials: air leakage, leakage; The wear and tear of the inlet and outlet air duct (the wear of the cement discharge pulley) and the wear and deformation of the inlet and outlet spiral cylinder.

2.Slippery shoe made of pallet temperature: pallet splint wear and fastening cover shell oil leakage: connecting joint leakage, oil leakage fixing seat bolt inspection.

3.Fastening of cylinder bolts in the rotary part, grinding door and bolt sealing, blockage of the compartment plate, fastening of the bolts of the partition plate, wear and deformation of the partition plate, check the wear of the central screen, and the installation of the partition plate, guard plate and sieve plate should be leveled, the lining plate bolts and bolts are fastened, the lining plate is worn, and the lining plate is pad filling; Flange liner assembly clearance.

4.Transmission part of the main motor bearing temperature: check the large gear ring Harvard bolt main motor anchor bolts:

Check the sealing of the large gear ring cover Main motor connector inspection: check the temperature of the main reducer bearing of the large gear top clearance and side clearance: check the vibration of the anchor bolt main reducer of the auxiliary motor:

Check the anchor bolt fastening of the auxiliary motor connector main reducer: check the anchor bolts of the auxiliary reducer Main reducer connector inspection: check the auxiliary reducer connector Check the flange bolt of the large gear ring:

Check the lubricating oil of the auxiliary reducer.

1. The operation and maintenance personnel of the ball mill should be familiar with the structural performance of the crushing equipment and the name, specification and function of each component.

2. The operator should follow the principle of "four determinations", lubricate according to the requirements of each part marked in the lubrication diagram, and shall not use untreated waste oil to keep the lubrication point clean.

3. During operation, pay attention to check that the temperature of each bearing does not exceed 60, and check whether the bolts of each part are loose, whether there is abnormal sound, whether the water supply is uniform, whether there is slurry leakage in the cylinder, and whether the motor current and voltage are normal. Whether the protective cover of the transmission part is in good condition.

4. Keep the equipment hygienic and clean, except for the running part, the rest of the parts should be handled at any time.

Ball mill size gear shaft wear, tile seat cooling water jacket cracks, grinding head mouth thread wear, concrete base cracks, anchor bolt loosening, hollow shaft cracks and other faults can be repaired by Fushilan polymer composite materials, compared with the traditional method, with the characteristics of fast repair and good effect, it generally only takes 6 hours to repair, prolonging the service life of the equipment This cement equipment maintenance article has a case introduction, you can refer to the following

1. Add a fine crusher before the mill;

2. Improve the grinding system and improve the grinding efficiency;

3. Add a high-efficiency powder separator.

Types of ball mills.

There are many types of ball mills, and there are many ways to classify them. 62616964757a686964616fe4b893e5b19e31333330336361

1.According to the production method, it can be divided into inter-song ball mill and continuous ball mill;

2.According to the discharge method, it can be divided into center discharge ball mill (discharge through hollow shank shaft) and edge discharge ball mill (discharge through the sieve hole on the cylinder wall);

3.According to the characteristics of the grinding body, it can be divided into four types: steel ball mill, porcelain ball mill, rod mill and gravel mill;

4.According to the ratio of length to diameter of the cylinder (l d): ball mill and tube mill, in addition to cone mill.

The main specifications of the ball mill are expressed in terms of the diameter of the cylinder (the inner diameter d of the unlined plate) and the length l. Tubular ball mills and conical ball mills are not suitable for carbon and electric carbon industries, and the carbon industry mostly uses short cylinder ball mill equipment, and in order to improve production efficiency, it is generally equipped with an air separation system (wind discharge and air separation).

The drive of the cylinder can be driven by the shaft head of the cylinder, or by the transmission parts (pulleys, gears, etc.) installed in the barrel body or end cover, the former or called the center drive type, the latter called the edge drive type. The support of the cylinder can be supported by the main bearings on the frame at both ends, and also by the tugboat.

However, no matter what type it is, the crushing principle relies on the cylinder to drive the grinding body to achieve the impact grinding effect on the material. The motion parameters, structure, grinding body size, gradation and shape of the cylinder, the proportion of materials and the filling rate are the main problems of this machine. The ball mill can be dry grinding or wet grinding, and dry ball mill is generally used in carbon and electric charcoal plants, wind discharge and air selection.

Ball mill is a grinding machinery often used in the carbon cable and electric carbon industry, which has a good grinding effect on petroleum coke, asphalt coke, anthracite and other brittle materials, but it is not suitable for the grinding of natural graphite and artificial graphite, because the impact of steel balls will destroy the crystal structure of graphite.

The ball mill consumes a lot of kinetic energy, and when it is running, it has a large noise, large vibration, and a large maintenance workload, so it is gradually replaced by the Raymond mill, but its output is large, the structure is simple, and it is easy to manufacture, so it is still widely used in larger carbon electric carbon plants.

Specification 1000L 1500L 2000L Cylinder Diameter 900 950 1000 Cylinder Length 2000 2500 3000 Cylinder Speed 45 rpm 43 Rpm 43 Rpm Power kW 15kw 22kw Production capacity 3 4 tons 5 6 tons 7 8 tons Model Cylinder speed (r min) Ball loading capacity (t) Feeding particle size (mm) Discharge particle size (mm) Output (t h) Motor power (kw) Machine weight (t) 900 1800 36-38 20 900 3000 36 20 22 1200 2400 36 3 25 30 12 1200 3000 36 25 37 1200 4500 5 25 55 1500 3000 25 2-5 75 1500 4500 27 11 25 3-6 90-110 21 1500 5700 28 12 25 130 1830 3000 11 25 4-10 130 28 1830 4500 15 25 155 32 1830 6400 21 25 210 34 1830 7000 23 25 245 36 2100 3600 15 25 210 34 2100 4500 24 25 8-43 245 42 2100 7000 26 25 8-48 280 50 2200 4500 27 25 9-45 280 2200 6500 35 25 14-26 370 2200 7000 35 25 15-28 380 54 2200 7500 35 25 15-30 380 56 2400 4500 21 30 25 320 65 2700 4000 40 25 12-80 400 94 2700 4500 48 25 12-90 430 102 3200 4500 18 65 25 800 137 according to process conditions

The ball mill is mainly composed of the following parts:

Feed auger for feeding.

In the cylinder part, there are manholes on the cylinder for overhauling and replacing the lining plate of the cylinder.

The discharging part is used by the ball mill to discharge qualified products.

Main bearing section.

Transmission part. According to the needs of the process, the mill is divided into left-hand and right-hand rotation, and the supply is according to the order contract.