脱铜泥回收梯铋及砷处理工艺的研究

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中图分类号：TF817；TF818 文献标志码：A 文章编号：1004-4345（2025）02-0016-04

Research on the Recovery of Antimony and Bismuth from Depleted Copper Slime and Arsenic Treatment Process

GUO Yaxin1²，LI Tao1，2

（1. Zijin Copper Co.，Ltd.Shanghang，Fujian 3642Oo，China; 2.FujianKeyLaboratoryforGreen ProductionofCopperand Comprehensive Utilization of Associated Resources， Shanghang， Fujian 3642Oo， China）

AbstractInresponseto the problem of goldandsilverlosscausedbyantimonyandbismuth recoveryduring the leaching of depleted copper anode slime in the“sulfuricacid+sodium chloride”system，the paper puts forward a processroute of "pre- neutralizationof leachingsolution-cascadehydrolysis-alkali leachingforarsenicremoval-causticizationforalkalirecycling”to achieveeficientseparatioofrsenic，antionyandbismuthandandcompletetheharmlesstreatmentofarsenic.Teesearchresults indicatethatunder theoptialconditions，theuseof imemilkforpre-neutralizatinoftheleachingsolutioncanreducethesilver ρ（Ag） content to 0.02mg/L in the leaching solution and obtain undetectable ρ（Au） .Pre-neutralization post solution was diluted 8 times with water for hydrolysis，the hydrolysis rate of Sb is 96.01% ，and the precipitation rate of bismuth is less than 5% . Sodium hydroxide is added intoantimonyprecipiationostsolution tocontrolpHvalueto2.5forbismuthprecipitation，theBiprecipitationratefBi reaches 98.23% ，and the arsenic precipitation rate is 50.48% .Alkali leaching is carried out in bismuth precipitation post solution for arsenic removal， with an arsenic removal rate of 89.89 % and the arsenic mass fraction of arsenic in the alkali leaching residue of only 1.95 % . Causticization treatment generates calcium arsenate residue， which contains 26.72% arsenic and has an arsenic precipitation rate of 98.21%

Keywordsdepleted copper anode slime; pre-neutralizationtreatment; arsenic harmlesstreatment;antimony and bismuth classifying recovery

铜阳极泥作为铜电解精炼的副产物，因其富含大量金、银、铜、铂、钯等贵金属以及硒、碲、锑、铋等稀散元素[1-3]，已成为稀贵金属资源化利用的重要研究对象。（剩余4908字）