The dolomite powder processed by the vertical grinding mill can be used in rubber, glass products, metallurgical industry, refractory materials, building materials industry, application in agriculture, application in ceramic production, etc. Let's briefly introduce what are the uses of dolomite deep processing?
It can be added to natural rubber and synthetic rubber, and its rubber performance is basically the same as that of light calcium powder, but its cost is lower than that of light calcium powder. Utilizing dolomite to produce general-purpose calcium-magnesium powder for rubber, as a new type of additive and colorant, can partially or completely replace light calcium powder. The surface-modified dolomite powder can greatly increase the reinforcing performance of rubber products. Modified dolomite powder is coated with a surface modifier on the surface of dolomite powder, and then used as a filler. Commonly used surface modifiers include stearic acid or stearate, titanate, zircoaluminate, and mixed silane coupling agents. The purpose of modification is to change the surface alkalinity of dolomite powder, overcome the bonding performance between filler and rubber, reduce shrinkage and internal stress, prevent cracks from spreading, and improve the processing performance of product strength.
2. Glass products
Dolomite and limestone are the third largest components in glass raw materials besides silica sand and soda ash. Soda ash is the most expensive component in the production of bottle glass. Adding limestone can partially replace soda ash, but it will have adverse effects. The method of introducing magnesia in dolomite can further reduce the cost. Dolomite can also provide calcium oxide in the glass industry, and it can be added to the soda ash-lime-siliceous system to act as a flux. In addition, dolomite can also reduce glass aging, prevent chemical erosion caused by atmosphere or moisture, improve the plasticity of colored glass, and increase glass strength. Adding a certain amount of dolomite powder in the manufacture of glass can effectively reduce the high-temperature viscosity of the glass and improve the chemical stability and mechanical strength of the product. Practice also shows that: the introduction of dolomite powder in the preparation of low-temperature ceramics and float glass ingredients can significantly save energy consumption.
3. Metallurgical industry
Magnesium smelting industry: Dolomite with raw ore particle size of 30-120mm is an important raw material for the production of metal magnesium. Its smelting methods are mainly divided into two categories, namely electrolysis and silicon thermal reduction.
Refractories: As one of the important raw materials of basic refractories, dolomite is second only to magnesite in importance. It is mainly used for steelmaking converter lining, open hearth furnace, electric furnace wall, and secondly for refining equipment outside the furnace and cement Thermal equipment such as kilns. Dolomite can be used to produce dolomite brick series (currently mainly include conventional dolomite bricks, zirconium-added dolomite bricks, zirconium-added magnesia dolomite bricks, etc.), fused dolomite carbon bricks and fused magnesia dolomite carbon bricks, etc.
4. Building materials industry
The manufacture of magnesium oxychloride cement is another important use of dolomite. This magnesium-containing cement has good properties such as compressive strength, flexural strength and corrosion resistance. In particular, the stability of the magnesium oxychloride cement prepared by using the caustic powder prepared by dolomite calcined in a flame-chambered manner is better. Magnesium-containing cement has been widely used in floor boards, rapid-setting pavement paving and repair of pavement cracks and cracks. In addition, after calcining dolomite to generate caustic dolomite, it can also be processed into magnesium hydroxide cement and magnesium oxide sulfate cement. These two non-hydraulic gelling materials have the advantages of simple production process, fast setting and hardening, high strength, strong cohesive force, good elasticity, wear resistance, convenient molding, low energy consumption, etc., and have high development and use value.
5. Application in agriculture
Used to neutralize acidity in soil. Since long-term use of urea and other fertilizers is likely to cause soil acidity, dolomite can be directly added to urea to keep the soil at an appropriate pH value, which can generally increase crop yield by 15% to 40%, and can also improve the efficacy of herbicides , Herbicides are most effective when the pH is 6.0-6.2. Dolomite can also compensate for the loss of magnesium content in the soil. Dolomite particles of 1.2-0.8um can flow freely. Used as a fertilizer filler, it can improve the conditions for plants to use soil nutrients, reduce agglomeration, and facilitate the adjustment of fertilizer ratios. In livestock and poultry feed, calcium and magnesium are essential nutrients for animals. Adding an appropriate amount of dolomite powder in livestock and poultry feed is very beneficial for promoting the growth and development of animals and reducing diseases.
6. Application in ceramic production
Dolomite is used in blanks and glazes, and MgO and CaCO3 components are introduced to replace talc and calcite. The role of MgO is to: change the composition of the mixing system, thereby reducing the firing temperature of the green body; promote the dissolution of quartz and the formation of mullite, increase the amount of quartz, reduce the amount of feldspar, thereby increasing the transparency of the green body. Adding dolomite to the glaze is less prone to smoke than the glaze adding calcite, and crystallization rarely occurs, which is caused by dolomite being a double salt mineral. The dolomite-limestone mixture made of dolomite and marl can be used to produce anorthite and diopside-wollastonite clinker, which is suitable for fast firing porcelain. In the manufacture of wall tiles and fine pottery, the cost of this clinker is lower than that of separately synthesized calcium-magnesium compounds.
Dolomite deep processing has a wide range of uses and a very good market prospect. The recommended models for dolomite deep processing equipment include Guilin Hongcheng's HC pendulum Raymond mill, vertical mill, ultra-fine ring roller mill, and ultra-fine vertical mill. In particular, it is strongly recommended to use HLM vertical mill, Guilin Hongcheng HLM vertical mill is worth your own! High efficiency, low energy consumption, environmental protection and dust-free, easy maintenance, large feed particles, small footprint, stable product quality, low comprehensive investment cost... There are more unexpected advantages, please leave a message for detailed consultation.