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Why does the refired magnesia powder have strong fire resistance

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Why does the refired magnesia powder have strong fire resistance

Release date:2017-09-22 Author: Click:


Heavy burned magnesia is made from natural magnesite ore and calcined by high temperature shaft kiln. It is the raw material for brick making and the production of amorphous refractories. The finished products are used for steelmaking, EAF bottom and tamping.

Magnesite is mainly used for magnesite ore of more than 46%. Magnesite ore is calcined by high temperature shaft kiln and heated to 1400 - 1800 C. Mg (CO3) is completely decomposed to produce calfite and become hard reddish brown reburning magnesium. It has high refractoriness. It is an ideal raw material for manufacturing amorphous refractories. The products are used for steel-making open hearth, electric furnace bottom and tamping lining.

Refired magnesia


The refired magnesia Mill said the effect of sewage treatment in Magnesium Oxide, Magnesium Oxide can react with sewage to produce magnesium hydroxide, the powder form of Magnesium Oxide and sewage reaction first produce magnesium hydroxide, Magnesium Oxide and sewage reaction to produce magnesium hydroxide, while treating the harmful impurities in the sewage, the use of magnesium hydroxide It can be used as neutralizer. Magnesium hydroxide is alkaline and has good adsorption properties. It can be used as neutralizer for acid waste gas, wastewater treatment, heavy metal and organic waste liquid treatment. In recent years, it has been widely used in water treatment system.

When the magnesite is calcined at 1800, the carbon dioxide completely escapes, and the Magnesium Oxide forms a compacted block of the calcinate, weighing the magnesite (also called the sintered magnesium powder), which has a high refractoriness. Its main component is Magnesium Oxide, which is made from natural high-grade magnesite ore by flotation purification, light burning, fine grinding, high-pressure ball pressing and ultra high temperature oil shaft kiln calcining.