硫化沉淀法回收锌浸出液中的铜
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摘要
基于不同金属硫化物在溶液中溶解度的差异,采用硫化沉淀法从锌酸性浸出液中选择性回收铜,并对不同沉淀剂(Na_2S与ZnS)的沉铜方案进行了对比,研究了沉淀剂添加量、反应温度以及反应时间对铜沉淀率以及沉淀渣中铜含量的影响,实验结果表明,ZnS是较好的沉淀剂;ZnS用量为理论用量的5倍、反应温度70℃、反应时间60 min时,铜沉淀率为99.17%,沉铜渣中铜、锌含量分别为10.17%和46.50%。
A study was presented on selective recovery of copper from zinc-containing acid leach solution by sulfide precipitation, due to the difference in the solubility of different metallic sulfide in solution. The copper precipitation schemes by using different precipitating agents(Na_2S and ZnS) were compared for investigating the effects of addition of precipitating agent, reaction temperature and time on copper precipitation rate, as well as on the copper content in the precipitation residue. The experiment results indicated ZnS was a good precipitator. A 60-min reaction at 70 ℃ with the dosage of ZnS 5 times as much as the theoretical amount, resulted in the copper precipitation rate up to 99.17%, with the copper and zinc contents in the precipitation residue at 10.17% and 46.50%, respectively.
A study was presented on selective recovery of copper from zinc-containing acid leach solution by sulfide precipitation, due to the difference in the solubility of different metallic sulfide in solution. The copper precipitation schemes by using different precipitating agents(Na_2S and ZnS) were compared for investigating the effects of addition of precipitating agent, reaction temperature and time on copper precipitation rate, as well as on the copper content in the precipitation residue. The experiment results indicated ZnS was a good precipitator. A 60-min reaction at 70 ℃ with the dosage of ZnS 5 times as much as the theoretical amount, resulted in the copper precipitation rate up to 99.17%, with the copper and zinc contents in the precipitation residue at 10.17% and 46.50%, respectively.
引文
[1]刘卫平.湿法炼锌提高铜回收率的试验研究[J].世界有色金属,2015(5):39-41.
[2]郭天立,未立清,林伟,等.锌焙砂常规浸出条件下Cu2+行为分析[J].中国有色冶金,2013(3):61-63.
[3]冶玉花,张昱琛.提高锌湿法冶炼系统铜回收率及铜渣品位的实践[J].中国有色冶金,2015(6):56-57.
[4]张添富.高铁锌焙砂还原-氧化焙烧回收锌及其伴生金属试验研究[D].长沙:中南大学资源加工与生物工程学院,2018.
[5]彭容秋,任鸿久,张训鹏,等.铅锌冶金学[M].北京:科学出版社,2003.
[6]梅光贵,王德润,周敬元,等.湿法炼锌学[M].长沙:中南大学出版社,2001.
[7]Zhang W,Cheng C Y.Manganese metallurgy review.Part II:Manganese separation and recovery from solution[J].Hydrometallurgy,2007,89(3-4):160-177.
[8]邬建辉,董波,张献鹏,等.选择性沉淀法从粗硫酸镍溶液中回收铜[J].矿冶工程,2018(2):88-90.
[9]Shea D,Helz G R.The solubility of copper in sulfidic waters:Sulfide and polysulfide complexes in equilibrium with covellite[J].Geochimica Et Cosmochimica Acta,1988,52(7):1815-1825.
[10]Hille R P V,Peterson K A,Lewis A E.Copper sulphide precipitation in a fluidised bed reactor[J].Chemical Engineering Science,2005,60(10):2571-2578.
[2]郭天立,未立清,林伟,等.锌焙砂常规浸出条件下Cu2+行为分析[J].中国有色冶金,2013(3):61-63.
[3]冶玉花,张昱琛.提高锌湿法冶炼系统铜回收率及铜渣品位的实践[J].中国有色冶金,2015(6):56-57.
[4]张添富.高铁锌焙砂还原-氧化焙烧回收锌及其伴生金属试验研究[D].长沙:中南大学资源加工与生物工程学院,2018.
[5]彭容秋,任鸿久,张训鹏,等.铅锌冶金学[M].北京:科学出版社,2003.
[6]梅光贵,王德润,周敬元,等.湿法炼锌学[M].长沙:中南大学出版社,2001.
[7]Zhang W,Cheng C Y.Manganese metallurgy review.Part II:Manganese separation and recovery from solution[J].Hydrometallurgy,2007,89(3-4):160-177.
[8]邬建辉,董波,张献鹏,等.选择性沉淀法从粗硫酸镍溶液中回收铜[J].矿冶工程,2018(2):88-90.
[9]Shea D,Helz G R.The solubility of copper in sulfidic waters:Sulfide and polysulfide complexes in equilibrium with covellite[J].Geochimica Et Cosmochimica Acta,1988,52(7):1815-1825.
[10]Hille R P V,Peterson K A,Lewis A E.Copper sulphide precipitation in a fluidised bed reactor[J].Chemical Engineering Science,2005,60(10):2571-2578.