钴渣中三价钴的还原浸出试验研究
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摘要
研究了电积钴生产过程产出的氧化钴渣中三价钴的还原浸出工艺。试验结果表明,在液固比6∶1,浸出温度60～70℃,浸出终点pH=3.5,反应时间60min,搅拌转速300r/min,加入2.5倍钴量(摩尔比)的还原剂亚硫酸钠再浸出120min,钴的最高浸出率达到99.86%。
The study is carried out for the reduction leaching process of trivalent cobalt in cobalt oxide slag in the production process of electrodeposition cobalt. The test results show, when the liquid-solid ratio is 6:1, the leaching temperature is 60～70℃, leaching end pH shall be controlled in 3.5, the reaction time is 60 min, the rotating speed is 300 r/min, The reducing agent sodium sulfite with the 2.5 times volume of cobalt(molar ratio) shall be added, and leaching for 120 min again, the maximum leaching rate of cobalt can reach to 99.86%.
The study is carried out for the reduction leaching process of trivalent cobalt in cobalt oxide slag in the production process of electrodeposition cobalt. The test results show, when the liquid-solid ratio is 6:1, the leaching temperature is 60～70℃, leaching end pH shall be controlled in 3.5, the reaction time is 60 min, the rotating speed is 300 r/min, The reducing agent sodium sulfite with the 2.5 times volume of cobalt(molar ratio) shall be added, and leaching for 120 min again, the maximum leaching rate of cobalt can reach to 99.86%.
引文
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[3]沙涛.β-萘酚钴渣CO还原浸出回收钴[C]//低碳经济条件下重有色金属冶金技术发展研讨会———暨重冶学委会第六届委员会成立大会论文集,2010.
[4]欧俊,蓝德均.酸浸法处理湿法炼锌高钴锌渣回收锌和钴[J].桂林工学院学报,2008,28(1):94-97.
[5]宋阜.从钴二次资源中回收钴制备四氧化三钴的研究[D].长沙:中南大学,2010.
[6]曹秀红.电解锌钴渣净化综合回收工艺研究[J].资源再生,2011(1):50-51.
[7]黄胜,张磊,王海北,等.复杂硫化钴矿加压浸出工艺研究[J].有色金属(冶炼部分),2010(1):2-4.
[8] Supasan Sakultung,Kejvalee Pruksathorn,Mali Hunsom. Simul-taneous recovery of valuable metals from spew mobile phone bat-tery by an acid leaching process[J]. Korean Journal of ChemicalEngineering,2007,24(2):272-277.
[9]李勇火,杨祥.用硫酸从钴土矿中还原浸出钴的试验研究[J].湿法冶金,2012,31(3):149-151.
[10] Li Guanghui,Rao Mingjun,Li Qian,et al. Extraction of cobaltfrom laterite ores by citric acid presence of ammonium bifluoride[J].Transactions of Nonferrous Metals Society of China,2010,20(8):1517-1520.
[11]佘宗华,刘健忠,宁顺明.从印尼含镍红土矿中浸出镍钴工艺试验研究[J].湿法冶金,2011,30(2):120-123.
[12]栾广英,关晓宇.钴渣提取氧化钴工艺的改进[J].有色金属(冶炼部分),1993(3):15-16.
[13]王鹏伟,陈枫,黄振华,等.钴渣选择性酸溶抑制铜铁的研究与实践[J].有色矿冶,1998,27(1):38-42.
[14]王开毅,蔡春林,钱东,等.钴渣氨浸工艺的研究[J].稀有金属,2001,25(4):312-314.
[15]李洪桂.浸出过程的理论基础及实践[J].稀有金属与硬质合金,1991(3):32-36.
[16]杨新生.氨浸过程浅析[J].有色矿冶,1993,22(1):34-38.
[17]《浸矿技术》编委会编,浸矿技术[M].北京:原子能出版社,1994.
[18]中南矿冶学院分析化学教研室编.化学分析手册[M].北京:科学出版社,1982.