盐酸强化还原钛铁矿中金属铁的锈蚀动力学.pdfVIP

第 20 卷第 10 期 中国有色金属学报 2010 年 10 月 Vol.20 No.10 The Chinese Journal of Nonferrous Metals Oct. 2010 文章编号：1004-0609(2010)10-2038-07 盐酸强化还原钛铁矿中金属铁的锈蚀动力学 郭宇峰，刘水石，马晓雯，姜 涛，邱冠周 ( 中南大学 资源加工与生物工程学院，长沙 410083) 摘 要：研究盐酸对攀枝花还原钛铁矿中金属铁锈蚀反应速率和锈蚀法铁钛分离效果的影响，并对还原钛铁矿中 金属铁的锈蚀反应动力学进行分析。结果表明：盐酸显著提高还原钛铁矿中金属铁的锈蚀反应速率及锈蚀法钛铁 分离的效果；当盐酸用量由 0 增加到 4% 时，还原钛铁矿中金属铁的锈蚀率由 43%提高到 90% 以上，锈蚀法钛铁 分离后富钛料中 TiO 的品位由 64.92%提高到 81.21%，总铁含量(Fe ) 由 18.25%降到 5.06%；还原钛铁矿中金属铁 2 T 的锈蚀反应受内扩散控制，添加4% 的盐酸，锈蚀反应的表观活化能由 59.26 kJ/mol 降低到 38.65 kJ/mol，其作用 机理是盐酸促进金属铁锈蚀过程的阴极反应，从而加快 Fe2+ 的生成和扩散速率。 关键词：还原钛铁矿；钛铁分离；富钛料；还原锈蚀；动力学 中图分类号：TF823 文献标志码：A Rusting kinetics of metallic iron in reduced ilmenite strengthened by hydrochloride GUO Yu-feng, LIU Shui-shi, MA Xiao-wen, JIANG Tao, QIU Guan-zhou (School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China) Abstract: The effect of hydrochloride on the rusting rate of metallic iron in Panzhihua reduced ilmenite and separation efficiency of titanium and iron by rusting process were studied. The rusting kinetic of the metallic iron in reduced ilmenite was analyzed. The results show that hydrochloride can significantly increase the reaction rate and separation efficiency of titanium and iron. As the dosage of hydrochloride increases from 0 to 4%, the rusting rate of the metallic iron in the reduced ilmenite increases from 43% to more than 90%, TiO2 grade of Ti-rich material increases from 64.9