矿产综合利用2024，Vol.45Issue(3)：135-142,156,9.DOI:10.3969/j.issn.1000-6532.2024.03.021
含锌电炉粉尘钙化碳热还原焙烧实验
Experiment on Calcified Carbothermal Reduction Roasting of Zinc Containing Electric Furnace Dust
摘要
Abstract
This is an article in the field of metallurgical engineering.In order to strengthen the effective separation and recovery of zinc and iron resources in zinc containing electric arc furnace dust(EAFD),and reduce the consumption of carbon reducing agent,the idea and method of calcified carbothermal reduction roasting with high basicity burden prepared from EAFD was proposed.Thermodynamic calculation and test study were combined,the main phase transformation during the calcified carbothermal reduction roasting process of EAFD was analyzed to explore calcified carbothermal reduction reaction behavior and path.It is shown that the reduction of ZnFe2O4 to Fe0.85-xZnxO inhibits the reduction and volatilization of zinc when the molar ratio of carbon to oxygen is less than 0.6 and the temperature is lower than 1000 ℃.While the calcification of ZnFe2O4 and Fe0.85-xZnxO to Ca2Fe2O5 by adding CaO can promote the reduction of zinc and Ca2Fe2O5 will be further reduced.When the temperature is lower than 1100 ℃ and nc/no＜1.0,the reaction path of calcified carbothermal reduction roasting is ZnFe2O4+CaO → Ca2Fe2O5+ZnO → Ca2Fe2O5+Zn(g)and Fe0.85-xZnxO+CaO → Ca2Fe2O5+ZnO+FeO → Ca2Fe2O5+Fe+Zn(g).Both of these reactions can promote the release of zinc.The results show that CaO can promote zinc volatilization in the range of nc/no 0.4～1.2 and calcination temperature 1000～1100 ℃.The dezincification rate of calcified carbon thermal reduction roasting at nc/no=1.0 is close to that at nc/no=1.2,both of which are about 90％,so the consumption of carbon reducing agent can be reduced and energy consumption can be saved.关键词
冶金工程/电炉粉尘/钙化碳热还原焙烧/物相转变/脱锌率/资源化利用Key words
Metallurgical engineering/EAFD/Calcified carbothermal reduction roasting/Phase transformation/Zinc volatilization degree/Resource utilization分类
矿业与冶金引用本文复制引用
余水,邱家用,居殿春,朱开琦,陶雨倩,毛瑞..含锌电炉粉尘钙化碳热还原焙烧实验[J].矿产综合利用,2024,45(3):135-142,156,9.基金项目
"十三五"国家重点研发计划基金资助项目(2017YFB0603801) （2017YFB0603801）
江苏省自然科学基金资助项目(BK20161271) （BK20161271）
江苏科技大学本科创新创业训练计划项目 （）
