含锰反萃液制备高纯碳酸锰工艺研究  

Study on Preparation of High Purity Manganese Carbonate from Manganese-Bearing Stripping Solution

作　　者：唐明洁 张荣荣 刘少葵 刘勇奇 TANG Ming-jie;ZHANG Rong-rong;LIU Shao-kui;LIU Yong-qi(Hunan Brunp Recycling Technology Co., Ltd., Changsha 410600, China)

机构地区：[1]湖南邦普循环科技有限公司,长沙410600

出　　处：《有色金属（冶炼部分）》2020年第4期57-60,66,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家重点研发计划项目(2018YFC1901801、2018YFC1901803);宁乡市科技重大专项(NXKJ-ZDZX-[201807]);宁乡市科技计划项目(NXKJ-JCKY-[201805])。

摘　　要：以含锰反萃液为原料,经针铁矿法除铁、硫化除重金属、碳化、洗涤制备了合格高纯碳酸锰。考察了终点pH、反应温度对除铁率的影响和(NH4)2S加入量、温度、反应时间对重金属去除率的影响,结果表明:在pH=4.0、反应温度95℃的条件下可将铁除至1.5 mg/L以下;除铁滤液加入2.2倍计量比的(NH4)2S,在反应温度35℃、反应时间60 min的条件下,Ni、Co、Zn可降低至1 mg/L以下;除重金属滤液加入碳酸氢铵调节pH在7.0~7.2,过滤、洗涤,获得满足HG/T 2836—2011(Ⅰ型)产品标准的合格高纯碳酸锰,锰回收率为93.9%。Qualified high purity manganese carbonate was prepared from manganese-bearing stripping solution through iron removal by goethite,removal of heavy metals by sulfurization,carbonization,and washing.Effects of pH value of end point and reaction temperature on iron removal rate,and(NH4)2S dosage,reaction temperature and time on heavy metal removal rate were investigated.The results show that residual iron concentration is 1.5 mg/L below under the conditions including pH value of end point of 4.0,reaction temperature of 95℃.Residual concentration of Zn,Ni,and Co is less than 1 mg/L under the conditions including(NH4)2S dosage of 2.2 times of theoretical amount,reaction temperature of 35℃,and reaction time of 60 min.High-purity manganese carbonate,prepared at pH value of 7.0-7.2 adjusted by NH4HCO3,filtration and washing,meets the first-class product standard of HG/T 2836—2011.Manganese recovery rate is 93.9%.

关 键 词：反萃液 针铁矿 硫化法除重金属 高纯碳酸锰 

分 类 号：TF803.24[冶金工程—有色金属冶金]