Secondary aluminum dross is the solid waste resulting from the extraction of metallic aluminum from aluminum slag,it contains aluminum nitride and salt refining agents,secondary aluminum dross has the dual attributes of resources and pollutants,long-term stockpiling will pose a threat to the en-vironment,while the aluminum compounds interspersed therein can be used for secondary recycling to alleviate the environmental crisis.At present,the secondary aluminum dross recycling methods mainly include hydrometallurgy and pyrometallurgy,hydrometallurgy is mainly to dissolve the secondary alu-minum dross,extract the aluminum elements inside for the preparation of alumina,polymerized aluminum chloride,etc.;pyrometallurgy is mainly cal-cined under high temperature conditions for the preparation of microcrystalline glass and refractory materials.This paper summarizes the hazards of second-ary aluminum dross,and outlines the current situation of harmless treatment and resource utilization of secondary aluminum dross,in order to improve the efficiency of resource utilization of secondary aluminum dross and reduce the pollution of secondary aluminum dross to the environment.
维普
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