Research and Application Progress on Aluminum Dross Recycling and Harmless Treatment

Abstract

Abstract: Aluminum dross is a hazardous waste produced in aluminum smelting process. Aluminum nitride, fluoride and chloride in aluminum dross have the characteristics of easy leaching, which aggravates the pollution to the environment, and the utilization of aluminum dross resources has become an urgent problem to be solved. In this paper, the sources, components and hazards of different aluminum dross were described, and the mineralogical properties of aluminum dross studied by previous researchers were summarized. The harmless treatment and recovery of alumina, aluminum nitride, fluoride and chloride by pyrometallurgical/hydrometallurgical process were introduced. The author summarized the harmless treatment and recycling process of aluminum dross and put forward the conception of three steps to realize zero waste discharge of aluminum dross, namely, water washing pretreatment-hydrometallurgical leaching of aluminum resources-waste utilization. Finally, the future development direction of comprehensive utilization of aluminum dross was prospected.

Key words: resource utilization, aluminum dross, pyrometallurgical treatment, hydrometallurgical treatment, alumina, aluminum nitride, fluoride, chloride

CLC Number:

TF821

WEI Jie, LIU Zhanwei, YAN Hengwei, YANG Wanzhang, LI Mengnan, LIU Shuxin. Research and Application Progress on Aluminum Dross Recycling and Harmless Treatment[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(7): 2308-2320.

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