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Brand Effect of Refractories--Medium-grade Magnesia

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Brand Effect of Refractories--Medium-grade Magnesia

Date of release:2019-03-18 Author: Click:

   

Brand effect of middle grade magnesia:


1. Improve the level of comprehensive utilization of resources and guarantee capacity.


By 2015, high-end refractories will be basically self-sufficient. The comprehensive utilization ratio of magnesite ore resources is not less than 90%, and that of refractory clay ore resources is not less than 80%. By 2020, the comprehensive utilization ratio of the two kinds of ore resources will be higher than 95% and 90%, respectively.


2. Improving industrial concentration.


By 2015, 2-3 enterprises with international competitiveness will be formed, and several new industrial demonstration bases will be established. The industrial concentration of the top 10 enterprises will reach 25%. By 2020, 


   

Silicon can promote the growth of columnar crystals in cast steel and reduce the plasticity of medium-grade magnesia manufacturer. Silicon can reduce the weldability of steel. Because the bonding ability of silicon with oxygen is stronger than that of iron, it is easy to produce low melting point silicate during welding, which increases the fluidity of molten slag and molten metal, causes splashing phenomenon and affects the welding quality. Therefore, the content of silicon must be strictly controlled in light-burned magnesia spheres to avoid being brought in as raw materials in steelmaking.


Main uses of fused magnesia: fused magnesia can be mainly used as auxiliary refractories such as spraying materials and ramming materials, as well as electrical grade magnesia powder for flow steel mouth bricks, magnesia bricks and magnesia chrome bricks, 97 fused magnesia, 98 fused magnesia and other special refractory bricks. It can also be used as refractory lining in vacuum and non-vacuum induction furnaces and electric arc furnaces to make magnesia crucibles. The ideal raw materials for crucibles, furnace galls and various high temperature casing.


Production process of large crystalline fused magnesia: large crystalline fused magnesia is mainly made by melting magnesia particles with 91% - 92% content and 0 mm - 3 mm size in electric arc furnace. The product has high purity, large grain size, compact structure, strong slag resistance and good thermal shock stability. It is an excellent high-temperature electrical insulation material, and also an important raw material for making high-grade magnesia brick, magnesia-carbon brick and amorphous refractories. Widely used in metallurgy, chemical industry, national defense, scientific research, aerospace, mid-grade magnesia price household appliances components.


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