文档介绍：第 41 卷第 1 期
2010 年 2 月
中南大学学报(自然科学版)
Journal of Central South University (Science and Technology)
废催化剂焙烧水浸渣中硫酸浸取钴的动力学研究
冯其明,邵延海,欧乐明,张国范,卢毅屏
(中南大学资源加工与生物工程学院,湖南长沙,410083)
Feb. 2010
摘
要:以废催化剂处理过程中得到的镍钴渣为研究对象,采用硫酸浸出镍钴渣,使钴和镍得到有效回收,并对
硫酸浸出钴的动力学进行探讨。研究结果表明:搅拌速度为 400~1 200 r/min 时对钴浸出率的影响非常小,物料粒
度、硫酸浓度和反应温度等因素对钴浸出率则有较大影响;当反应温度为 80 ℃,反应时间为 180 min,原料粒度
为(~) mm,H2SO4 浓度为 6 mol/L, 搅拌速度为 800 r/min,固液比为 1׃10 时,钴的浸出率为 %,
镍的浸出率则为 %;硫酸浸出镍钴渣的反应受产物层内扩散控制,表观活化能为 kJ/mol。
关键词:废催化剂;钴;硫酸;浸出;动力学
中图分类号:X705
文献标志码:A
文章编号:1672−7207(2010)01−0021−06
Leaching ics of cobalt from roasting-dissolving residue of
spent catalyst with sulfuric acid
FENG Qi-ming, SHAO Yan-hai, OU Le-ming, ZHANG Guo-fan, LU Yi-ping
(School of Resource Processing and Bioengineering, Central South University, Changsha 410083, China)
Abstract: The leaching ics of cobalt from roasting-dissolving residue (Ni-Co concentrate) of a spent catalyst was
investigated. The results indicate that the extraction of cobalt from Ni-Co concentrate with sulfuric acid leaching is
determined by particle size, sulfuric acid concentration and reaction temperature, while stirring speed in the range of
400−1200 r/min shows a negligible effect on extraction of cobalt. A cobalt recovery of % and a nickel recovery of
% are achieved by leaching − mm Ni-Co concentrate par