铁酸锌中锌的绿色浸出同步除铁实验研究  

Experimental study on zinc green leaching and iron synchronous removal from zinc ferrite

作　　者：冯好 李杨 张爽[1] 苏轶 张华 倪红卫[1,2,3] FENG Hao;LI Yang;ZHANG Shuang;SU Yi;ZHANG Hua;NI Hongwei(Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;Hubei Provincial Engineering Technology Research Center of Metallurgical Secondary Resources,Wuhan 430081,Hubei,China)

机构地区：[1]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081 [2]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081 [3]湖北省冶金二次资源工程技术研究中心,湖北武汉430081

出　　处：《钢铁研究学报》2023年第3期247-254,共8页Journal of Iron and Steel Research

基　　金：国家重点研发计划资助项目(2018YFC1900602-1,2020YFC1909700);钢铁冶金及资源利用省部共建教育部重点实验室开放基金资助项目(FMRUlab-20-2)。

摘　　要：以七水合硫酸亚铁(FeSO_(4)·7H_(2)O)为浸出剂,通过无酸氧压浸出工艺,实现铁酸锌(ZnFe_(2)O_(4))中的锌的高效浸出和铁的同步分离。研究分析了FeSO_(4)·7H_(2)O与ZnFe_(2)O_(4)的质量比、反应温度、反应时间、氧分压对锌浸出和铁沉淀的影响。结果表明,在FeSO_(4)·7H_(2)O与ZnFe_(2)O_(4)质量比为10∶5,反应温度为180℃,氧分压为2 MPa,反应时间为3 h条件下,锌的浸出率可达87.65%,而铁以Fe_(2)O_(3)的形式存在浸出渣中,浸出液中铁的残留率仅为0.56%,实现了锌铁高效分离。该实验验证了FeSO_(4)·7H_(2)O浸出含锌粉尘中锌同步除铁的可行性,为利用FeSO_(4)·7H_(2)O对含锌电炉粉尘中锌的绿色提取提供理论基础和实验依据。Zn was leached from ZnFe_(2)O_(4)efficiently and Fe was separated from leaching solution simultaneously with FeSO_(4)·7H_(2)O as lixiviant using oxygen pressure leaching method.The effect of the mass ratio of FeSO_(4)·7H_(2)O to ZnFe_(2)O_(4),reaction temperature,reaction time and leaching pressure on the leaching rate of Zn and residue rate of Fe were investigated systematically.It is indicate that the optimal conditions are controlled at the mass ratio of FeSO_(4)·7H_(2)O to ZnFe_(2)O_(4)at 10∶5,the reaction temperature at 180℃,the leaching pressure at 3MPa and the reaction time for 3h.In the optimal leaching condition,87.65%of Zn can be leached from ZnFe_(2)O_(4)and only 0.56%of Fe left in the leaching solution.Most of Fe is precipitated in residue as Fe_(2)O_(3)and Zn is dissolved in solution as ZnSO_(4),which is beneficial for the separation of zinc and iron from ZnFe_(2)O_(4).The feasibility of zinc leaching and iron synchronous removal from zinc-bearing electric arc furnace dust using FeSO_(4)·7H_(2)O as lixiviant is verified,and then theoretical foundation and experimental evidence for further large-scale application of FeSO_(4)·7H_(2)O to treat zinc-bearing electric furnace dust are provided.

关 键 词：电炉粉尘 氧压浸出 七水合硫酸亚铁 铁酸锌 浸出率 

分 类 号：TF813[冶金工程—有色金属冶金] X757[环境科学与工程—环境工程]