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Improvement of electric melting magnesia technology equipment

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Improvement of electric melting magnesia technology equipment

Date of release:2018-07-12 Author: Click:


 

Because of the competitive price of China's fused magnesia, the Western sea magnesia production enterprises have largely failed. Ordinary fused magnesia process is currently more than 98.5% MgO content in the world market fused magnesia, China accounts for 90% of its application is more widely. However, the energy consumption of the product is high, and high-grade raw materials are needed. Therefore, it will be helpful to reduce energy consumption and control the quality by popularizing and improving technical equipment measures in the fused magnesia industry, which is the inevitable trend of future development.

Focus on developing synthetic raw materials

At present, the main raw materials for synthesis of magnesium oxide in Liaoning Province are fused magnesia-chrome sand, sintered magnesia-calcite sand, sintered magnesia-alumina spinel sand, sintered magnesia-alumina-iron sand and so on. The annual output exceeds 200,000 tons. Magnesium-calcium refractory has excellent performance in use, but its application is limited due to the problem of CaO hydration, so the waterproof problem of magnesia-calcium refractory should be studied emphatically. It should be pointed out that MgO-CaO refractories can only remove sulfur and phosphorus impurities in steelmaking due to the presence of CaO, but CaO can not exist without hydration, only to prevent its hydration.

With the increase of environmental protection, chromium-containing refractories will be withdrawn from the market, and the research and production of alternative products is imperative. Therefore, it is necessary to further develop and produce MgO-Al2O3, MgO-CaO, MgO-ZrO2, MgO-SiO2, MgO-Fe2O3, MgO-CaO-Fe2O3, MgO-CaO-Fe2O3, MgO-Al2O3-ZrO2, MgO-CaO-ZrO2, MgO-Al2O3-Fe2O3 (FeO) for different uses. Magnesia raw material.

Ordinary fused magnesia process

 

Generally speaking, magnesite as a kind of non-renewable and indispensable strategic resources, limiting and reducing its exploitation, improving its resource utilization, is the focus of all related work in the future. Therefore, the state should substantially reduce the export quota of magnesia and limit the export of low value-added raw materials and ordinary magnesia products.

At the same time, enterprises with mine resources and qualified conditions are encouraged to carry out large-scale technological transformation and equipment renewal, or to exploit raw materials separately, and to concentrate on the construction of some large-scale raw material bases. Mining denudation, purification of low-grade ore, construction of large-scale light-burning and calcining equipment, industrialization of new sand-making process, need a large amount of funds and new technical support, and have a certain risk, I hope the relevant departments of the state to give policy, funds, science and technology support.

Only by establishing large-scale raw material bases, adopting systematic advanced technology and forming scale benefit, under the guidance of powerful national policies and regulations, can it be possible to weed out serious polluted raw material production enterprises and realize the elimination of backwardness in accordance with the principle of market economy. As the largest production base of magnesia refractory raw materials in the world, China can achieve long-term, stable and sustainable development only by adhering to the effective and rational utilization of magnesite resources, insisting on the management concept of low carbon, low energy consumption, low emission and low pollution, integrating economic benefits with resources and environmental protection, adhering to scientific and technological innovation and adjusting product mix. Sustained development.


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