What is a dolomite? - Shanghai Clirik - Mine Mill

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What is a dolomite?

Source:admin Posted:2023-04-12

Introduction Dolomite

Dolomite has a number of industrial uses. It is commonly used as a source of magnesium oxide for the production of refractory bricks used in steelmaking. It is also used as a flux in the production of iron and steel, and as a filler in paints, ceramics, and other products.

Application Dolomite

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.

Processing Dolomite

Since dolomite is so widely used, we can use those machines to process dolomite.

Clirik can provide you with a whole production line of equipment: CrusherElevatorDolomite Ultrafine powder grinding mill Coating machine – Conveyor- Packing machine.

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