SO_(2)还原浸出净化渣中钴的试验研究  

Experimental Study on Cobalt in SO_(2) Reducing Purification Residues

作　　者：王坤 刘俊场 牟兴兵 付维琴 邹维 杨睿潇 WANG Kun;LIU Jun-chang;MOU Xing-bin;FU Wei-qin;ZOU Wei;YANG Rui-xiao(Kunming Metallurgical Research Institute Co.,Ltd.,Kunming,Yunnan 650031,China)

机构地区：[1]昆明冶金研究院有限公司,云南昆明650031

出　　处：《云南冶金》2023年第S01期70-73,共4页Yunnan Metallurgy

基　　金：国家重点研发计划-战略性矿产资源开发利用专项(2022YFC2904604);云南省科技厅科技人才和平台计划一云南省技术创新人才后备人选(2019HB081)。

摘　　要：采用SO_(2)还原浸出工艺从湿法炼锌净化渣制备钴渣中高效浸出钴,研究了初始硫酸浓度、浸出时间、反应温度、SO_(2)气体浓度以及高浓度SO_(2)二段式浸出对湿法炼锌净化渣中钴浸出率的影响。结果表明,在液固比为10,初始硫酸浓度为20 g/L,浸出时间为24 h,反应温度为50℃,SO_(2)气体流速为0.15 L/min,SO_(2)气体浓度为0.25%时,钴的浸出率能达到94.50%;相同液固比、初始硫酸浓度、反应温度、SO_(2)气体流速的条件下,一段通10%SO_(2)气体2 h,二段不通气浸出反应12 h,此时的钴浸出率能达到94.68%。Cobalt preparation by zinc hydro-metallurgy purification residues was carried out by SO_(2) reducing and leaching process,it is studied the effect of initial sulfuric acid concentration,leaching time,reaction time,SO_(2) gaseous concentration and high concentration SO_(2) two stage leaching process on leaching rate of cobalt of zinc hydro-metallurgy purification residues.Results show:when liquid-solid ratio is 10,the initial sulfuric acid concentration is 20 g/L,leaching time is 24 h,the reaction temperature is 50℃,the SO_(2) gaseous flow speed is 0.15 L/min,SO_(2) gaseous concentration is 0.25%,the leaching rate of cobalt can reach to 94.50%;when the liquid-solid ratio,initial sulfuric acid concentration,reaction temperature,SO_(2) gaseous flow speed under the same conditions,10% SO_(2) flow at the first stage for 2 h,no gas flow and take leaching reaction for 12 h at the second stage,the leaching rate of cobalt can reach to 94.68%.

关 键 词：钴 还原浸出 净化渣 SO_(2) 二段式浸出 

分 类 号：TF816[冶金工程—有色金属冶金]