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METHOD FOR PREPARING METAL MAGNESIUM AND MAGNESIUM-ALUMINIUM SPINEL WITH ACTIVE MAGNESIA AND ALUMINIUM OR ALUMINIUM ALLOY AS RAW MATERIALS
METHOD FOR PREPARING METAL MAGNESIUM AND MAGNESIUM-ALUMINIUM SPINEL WITH ACTIVE MAGNESIA AND ALUMINIUM OR ALUMINIUM ALLOY AS RAW MATERIALS
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机译：以活性镁和铝或铝合金为原材料制备金属镁和镁铝尖晶石的方法
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摘要
A method for preparing metal magnesium and magnesium-aluminium spinel with active magnesia and aluminium or an aluminium alloy as raw materials, comprising the following steps: (1) calcinating magnesite or brucite, and grinding to obtain an active magnesia powder; (2) homogenously mixing a reductant and the active magnesia powder, to prepare a mixture compacted into a lump; (3) reducing at 1,100-1,300°C, to produce a gaseous metal magnesium and a solid cake slag; (4) finely grinding the solid cake slag, obtaining a lump by compacting, and obtaining a product magnesium-aluminium spinel by calcinating. In the method of the present invention, the calcinated active magnesia is used as the raw material and reacted with aluminium or aluminium alloy, to produce metal magnesium and magnesium-aluminium spinel, in which the aluminium powder is an industrial aluminium powder or an aluminium powder produced by recycling waste aluminium, and the aluminium alloy powder is an industrial aluminium alloy powder or an aluminium alloy powder produced by recycling waste aluminium alloy. The method has a simple process and a low cost, and is thus suitable for industrialized production.
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