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| Study on Strengthening Process of Removal of Fluorine and Chlorine from Zinc Oxide Dust by Roasting |
| Received:September 27, 2021 Revised:October 01, 2021 |
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| DOI：doi：10.3969/j.issn.1007-7545.2022.02.004 |
| KeyWord:zinc oxide dust; roasting; multi hearth furnace; fluorine; chlorine; thermodynamics |
| Author | Institution |
| WU Xing-lin |
紫金矿业集团股份有限公司 |
| LIN Hong-fu |
紫金矿业集团股份有限公司 中南大学 |
| ZHANG Hen-xing |
紫金矿业集团股份有限公司 |
| CHEN Hang |
紫金矿业集团股份有限公司 昆明理工大学 |
| KUANG Chen |
紫金矿业集团股份有限公司 |
| ZHONG Shui-ping |
紫金矿业集团股份有限公司 福州大学 |
| CHI Xiao-peng |
福州大学紫金矿业学院 |
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| Abstract: |
| To address low removal rate of fluorine and chlorine from zinc oxide flue dust roasted in multi hearth furnace, thermodynamic analysis of zinc oxide flue dust roasting process was carried out, and experimental verification was carried out based on thermodynamic analysis results. The results show that removal rates of fluorine and chlorine is 98.06% and 91.56% respectively under the condition including flue gas flow of 400 mL/min, flue gas components of SO2 0.32%, O2 7.61%, H2O 9.61%, N2 82.46% (simulation of flue gas of rotary kiln), roasting temperature of 700 ℃, and roasting time of 210 min. |
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