粗制氢氧化镍钴(MHP)两段浸出工艺研究  

Study on Two Stage Leaching Process of Crude Nickel Cobalt Hydroxide(MHP)

作　　者：张学东 王海北 刘三平 郑朝振 秦树辰 邓超群 周起帆 王玉芳 ZHANG Xue-dong;WANG Hai-bei;LIU San-ping;ZHENG Chao-zhen;QIN Shu-chen;DENG Chao-qun;ZHOU Qi-fan;WANG Yu-fang(BGRIMM Technology Group,Beijing 100160,China)

机构地区：[1]矿冶科技集团有限公司,北京100160

出　　处：《有色金属（冶炼部分）》2023年第8期32-36,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家重点研发计划项目(2019YFC1907403)。

摘　　要：为了更高效地从粗制氢氧化镍钴中浸出镍、钴,采用两段浸出工艺,以瑞木粗制氢氧化镍钴为原料浸出镍、钴,考察一段浸出pH、温度、浸出时间,以及二段浸出硫酸加入量和时间对镍、钴、锰浸出效果的影响。研究得出:在一段浸出温度70℃、pH=2.0~2.5、浸出时间1.5 h,二段浸出硫酸加入量为一段硫酸加入量的50%~70%的条件下,镍、钴浸出效果最好,分别可以达到100%和98.99%,锰的浸出率可以抑制在36.82%,此时渣率为5.32%,渣中钴和锰元素含量分别为0.71%和55.55%,两段总的酸耗在760 kg t左右。根据小试条件进行300 kg d连续扩大试验,结果可以达到小试的浸出效果。In order to extract nickel and cobalt from crude nickel cobalt hydroxide more efficiently,two-stage leaching process was used to leach nickel and cobalt from Ruimu crude nickel cobalt hydroxide(MHP).The effects of pH value,temperature and time of first-stage leaching,and sulfuric acid dosage and time in second-stage leaching on the leaching effect of nickel,cobalt and manganese were investigated.The results show that under the conditions of the first stage leaching temperature of 70℃,pH value of 2.0—2.5,leaching time of 1.5 h,and sulfuric acid addition of second stage is 50%—70%of the first stage,the nickel and cobalt leaching effect is the best,which can reach 100%and 98.99%respectively,manganese leaching rate can be inhibited at 36.82%,and the slag rate is 5.32%.The cobalt and manganese content in slag is 0.71%and 55.55%,respectively.The total acid consumption is about 760 kg t.According to the conditions of the small-scale experiment,the continuous expansion test results of 300 kg d can achieve the leaching effect of the small-scale test.

关 键 词：粗制氢氧化镍钴 镍 钴 浸出率 扩大试验 

分 类 号：TF815[冶金工程—有色金属冶金] TF816