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| Study on Oxidation and Removal of Harmful Elements of Secondary Aluminum Dross |
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Received:March 09, 2020
Revised:April 02, 2020
Accepted:April 02, 2020
Published Online:August 17, 2020
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| DOI：doi：10.3969/j.issn.1007-7545.2020.09.014 |
| KeyWord:secondary aluminum dross; oxidation calcination; alumina; harmful element |
| Author | Institution |
| LI Xue-qian |
北京科技大学 冶金与生态工程学院 |
| SHEN Shi-fu |
北京矿冶科技集团有限公司 |
| WANG Ling |
北京科技大学 冶金与生态工程学院 |
| HENG Xue-jie |
北京矿冶科技集团有限公司 |
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| Abstract: |
| Secondary aluminum dross with main phases of aluminum nitride and magnesium aluminate spinel was treated by non-additive oxidation calcination. Oxidation characteristics of aluminum nitride and removal of harmful elements (F, Cl, K, Na) were explored at different calcination temperatures, time and oxygen concentration. The results show that aluminium nitride can be completely transformed into alumina and removal rate of F and Cl is 84% and 99% respectively when aluminum dross is calcined at 1 100 ℃ for 2 h in oxygen atmosphere, which meets the national requirements for hazardous waste treatment. Secondary aluminum dross pretreated by roasting can be used to produce refractory materials, and comprehensive utilization of solid waste resources is realized. |
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