Processing technic of dolomite grinding mill

Combining the many advantages of previous milling machinery and equipment, Clirik fully considers the needs of production and processing in the new environment, and systematically upgrades dolomite grinding mill. Whether it is dolomite production and processing or other ore materials processing, it is more in line Modern energy-saving, environmental protection and large-scale production requirements, its working principle is: large pieces of material are crushed into small particles by the crusher and then sent to the storage bin of the mill by the elevator, and then pass through the vibrating feeder and the inclined feeding pipe , The material is evenly sent to the bulk material tray on the upper part of the turntable; the material is scattered to the periphery of the circle under the action of centrifugal force, and falls into the raceway of the grinding ring, and is impacted, rolled, and ground by the ring roller, and passes through the three-layer ring The high-pressure fan sucks the external air into the machine through suction, and brings the crushed material into the powder concentrator; the rotating impeller in the powder concentrator makes the coarse material fall back and regrind, which meets the required fineness. The powder enters the cyclone powder collector with the air flow and is discharged by the discharge valve at the lower part of the cyclone powder collector, which is the finished product, while the air flow with a small amount of fine dust is purified by the pulse dust collector and discharged through the fan.
The main products of dolomite ore processed by milling machine are: dolomite sand 6-10 mesh, 10-20 mesh, 20-40 mesh, 40-80 mesh, 80-120 mesh; dolomite superfine powder 140 mesh, 325 mesh, 600 mesh, 1000 mesh, 1600 mesh.

Application area

Dolomite is widely used in building materials, ceramics, welding, rubber, paper, plastics and other industries. In addition, it is also used in the fields of agriculture, environmental protection, energy saving, medicine and health care.
 

(1) Utilization in metallurgical industry
Dolomite is mainly used in the metallurgical industry as a flux, refractory material, and refining metal magnesium and magnesia. As a flux for ironmaking and steelmaking, dolomite can neutralize acidic slag, increase the alkalinity of the slag, reduce the activity of FeO in the slag, and reduce the erosion of the slag on the furnace lining. Light-burned dolomite is mainly used for steelmaking. It can improve the fluidity of steel slag and can be used as a slag-forming agent. It can not only extend the life of the converter, increase the fluidity of the slag, but also improve the progress of desulfurization and dephosphorization reactions, and save a lot of fluorite. At present, 170kg of dolomite is consumed in the production of 1t of steel in my country. Adding dolomite during ironmaking can dilute the slag, lower the melting point of the slag, reduce fuel consumption, and improve the quality of pig iron.

(2) Utilization in the building materials industry
After proper calcination, dolomite can be processed into dolomite. It has clean whiteness, strong adhesion, solidification and good fire resistance and heat insulation properties. It is suitable for interior and exterior wall coatings; it can also be used to make magnesium chloride cement and magnesium sulfide cement , Because it has good compressive strength, flexural strength, and excellent performance of fire resistance and insect resistance, it can play a good waterproof role after adding other fillers, so it can be used as a floor material, and the price is low; Baiyun Rock powder can be used for crack treatment and as pavement material and cement mortar sintered slag. Adding 40% dolomite to cement can speed up the hydration of cement; in addition, dolomite is used as a component of cement, glass and ceramics in the construction industry. It can increase the strength and luster of the glass.

(3) Utilization in the chemical industry
Dolomite is mainly used to produce chemical raw materials such as magnesium sulfate and light magnesium carbonate. 30% dilute sulfuric acid and dolomite are mixed, reacted, separated and concentrated in a certain proportion, calcium sulfate is precipitated under temperature rise conditions, and the obtained magnesium sulfate solution is cooled and crystallized to obtain magnesium sulfate (MgSO47H2O). Mg(OH)2 is extracted from seawater, and when calcined dolomite is used as a precipitant, the MgO in the dolomite is also recovered at the same time, which increases the output. Dolomite is calcined, digested, carbonized, filtered and separated to obtain heavy magnesium water, and then heated to decompose and filter to obtain light magnesium carbonate [xMgCO3yMg(OH)2zH2O]. Light magnesium carbonate is decomposed into light magnesium oxide, which can be used to sinter high-purity magnesia.

(4) Utilization in agriculture
Dolomite can be used as a neutralizer of soil acidity and compensate for the loss of calcium and magnesium in the soil due to crop absorption. The application of dolomite can increase crop yield by 15-40%; calcite-based dolomite is treated for agricultural use Lime can be used as a pesticide to prevent pests.

(5) Used as filler
Dolomite can be used as a filler for rubber and papermaking. Good-quality dolomite powder can be used as a substitute for expensive titanium dioxide fillers. It can be used as a filler for some products. It can improve the chromaticity and weathering resistance of products, improve mechanical stability, reduce shrinkage and internal tension, and reduce water and oil absorption. Capacity and expansion of cracks. Such products mainly include adhesives, sealing plastics, paints, detergents and cosmetics.

Equipment needed for dolomite grinding mill

■ Eurpean Powder Grinding Mill
1. High capacity and low power consumption
2. Uniform partcle size with high crushing and crushing ratio
3. Simple structure
4. Low investment, easy operation


■High Pressure Suspension Grinding Mill
1. Ertical structure, so it has small footprint, strong system.
2. Suitable for grinding of all kinds of materials whose Moh’s hardness is below 9.3
3. Compared with other mills, Raymond Mill has high passing rate - 99%.
4. Adjustable particle size:80-325mesh


■Raymond Grinding Mill
1. Suitable for processing various non-flammable and non-explosive mineral materials with Moh’s hardness less than 9.3 and humidity less than 6%
2. Adjustable particle size:80-325mesh
3. The main drive device of Raymond mill adopts airtight gear box and belt pulley, the transmission is stable and the operation is reliable.