Light burnt magnesia powder

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Whats the difference between medium grade magnesia and reburned magnesia

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Whats the difference between medium grade magnesia and reburned magnesia

Date:2017-06-08 author: click:

What's the difference between medium grade magnesia and reburned magnesia



Medium-grade magnesia is the main choice of raw materials is 92% magnesium oxide content. Magnesium oxide is pressed into spheres by ball pressing machine. The compacted sphere is 30mm in shape and 30mm in magnesia sphere is calcined in high temperature oil or coke shaft kiln. Calcinated products are called mid-grade magnesia. Mid-grade magnesia is mainly used to produce high-grade alkaline or amorphous refractories. Its products are mainly used in metallurgy, building materials, non-ferrous, chemical and other industries. In addition, in metallurgical aspect, medium grade magnesia is used to make metallurgical powder for joining furnace bottom and furnace wall, making slurry spraying lining: making magnesia brick and magnesia chrome brick; besides being used as furnace bottom lining, it is also widely used in electric steelmaking furnace, heating furnace, non-ferrous metal blowing furnace and rotary furnace.



Magnesium ores containing more than 46% of magnesite are mainly used for reburning magnesite. Magnesium (CO3) is decomposed completely when calcined in high temperature shaft kiln to 1400-1800 C to form periclase, which becomes hard reddish brown magnesia with high refractoriness. It is an ideal raw material for the production of amorphous refractories. Its products are used in open hearth, bottom of electric furnace and ramming lining.


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