乙酸铵浸出高炉瓦斯灰中的锌  

Leaching zinc from blast furnace dust with ammonium acetate

作　　者：马爱元 郑雪梅 张利波 彭金辉 李志 李松 MA Aiyuan;ZHENG Xuemei;ZHANG Libo;PENG Jinhui;LI Zhi;LI Song(School of Chemistry and Materials Engineering, Liupanshui Normol University, Liupanshui 553004, China;Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming University of Science and Technology, Kunming 650093, China)

机构地区：[1]六盘水师范学院化学与材料工程学院,六盘水553004 [2]昆明理工大学非常规冶金教育部重点实验室,昆明650093

出　　处：《环境工程学报》2018年第5期1547-1556,共10页Chinese Journal of Environmental Engineering

基　　金：国家重点基础研究发展计划(973)项目(2014CB643404);六盘水师范学院2017年度高层次人才科研启动基金资助项目(LPSSYKYJJ201707);六盘水师范学院重点学科建设项目(LPSSYZDPYXK201708)

摘　　要：采用NH_3-CH_3COONH_4-H_2O体系进行了高炉瓦斯灰提锌工艺研究。结果表明:控制浸出温度45℃,总氨浓度5 mol·L^(-1),液固比5:1,[NH_3]/[NH_4]^+摩尔比1:1,搅拌速度300 r·min^(-1),浸出时间60 min,锌浸出率达77.79%。FT-IR及ESI-MS分析显示羧酸阴离子能结合Zn离子形成复杂的羧酸盐配合物,添加CH_3COONH_4能促进锌的溶出,XRD、SEM-EDS表征分析显示浸出渣中残留ZnFe_2O_4是导致锌浸出率低的限制性因素。Zinc recovery from blast furnace dust（BFD） in NH3-CH3COONH4-H2O system is investigated. It was found that 77.79% of Zn could be dissolved from the BFD under the conditions of total ammonia concentration of 5 mol·L^（-1）, stirring speed of 300 r·min^（-1）, [NH3]/[NH4]~＋ of 1：1, liquid-solid ratio of 5：1, leaching temperature of 45 ℃ and leaching time of 60 min. The results of FT-IR and ESI-MS analysis showed that zinc can combine with the carboxylate anion to form Zn-complexes and promote the dissolution of zinc. Compare with the phase and morphology structure of samples before and after leaching by XRD and SEM-EDS, it is found that ZnFe2O4 is the low zinc leaching rate of the main restrictive factors.

关 键 词：高炉瓦斯灰 锌 浸出 NH3-CH3COONH4-H2O体系 

分 类 号：X758[环境科学与工程—环境工程]