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METHOD OF SEPARATING AND RECOVERING IRON FROM WASTE NON-FERROUS SLAG DISCHARGED FROM PROCESS FOR SMELTING OF NON-FERROUS METALS, INCLUDING COPPER, ZINC AND LEAD BY PHYSICAL AND CHEMICAL SEPARATION TECHNIQUE
METHOD OF SEPARATING AND RECOVERING IRON FROM WASTE NON-FERROUS SLAG DISCHARGED FROM PROCESS FOR SMELTING OF NON-FERROUS METALS, INCLUDING COPPER, ZINC AND LEAD BY PHYSICAL AND CHEMICAL SEPARATION TECHNIQUE
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机译:用物理和化学分离技术从包括铁,锌和铅在内的非铁金属熔炼过程中排出的无铁渣中分离和回收铁的方法
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摘要
The present invention provides a method of separating and recovering iron from a waste non-ferrous slag, generated in a process for smelting of non-ferrous metals, including copper, zinc and lead, in which a reducing agent and a reaction catalyst are added to the crushed waste non-ferrous slag, and the mixture is subjected to a reduction reaction, thereby converting amorphous iron oxides, bound to alumina, calcium oxide, magnesium oxide, silica, and the like in the waste non-ferrous slag, to crystalline iron (Fe) and iron carbide (Fe2C); the resulting material is crushed to separate iron and iron carbide obtained by the reduction reaction from components such as alumina, calcium oxide, magnesium oxide, silica, and the like; the crushed material is separated into fractions by particle size; and the fractions are subjected to wet magnetic separation and dry magnetic separation to separate and recover magnetic iron concentrates from the fractions.
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