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1、第21卷第4期中国有色金属学报2011年4月Vol.21No.4TheChineseJournalofNonferrousMetalsApr.2011文章编号：1004-0609(2011)04-0901-07复杂铜铅锌银混合精矿两段逆流氧压浸出工艺1,2341徐斌，钟宏，王魁珽，姜涛(1.中南大学资源加工与生物工程学院，长沙410083；2.四川鑫源矿业有限责任公司，成都610000；3.中南大学化学化工学院，长沙410083；4.中国恩菲工程技术有限公司，北京100038)摘要：通过对呷村铜铅锌银多金属混合精矿的矿物分析可知，铅
2、、锌主要赋存于方铅矿、闪锌矿中，而大部分铜、银均为难浸出的黝铜矿所载。采用两段逆流氧压浸出工艺进行处理该矿，条件试验研究得出一、二段最佳浸出条件分别为硫酸浓度150g/L、液固比3׃1、反应温度135℃、氧分压0.75MPa、浸出时间2.0h；硫酸浓度80g/L、液固比3׃1、反应温度180℃、氧分压1.0MPa、浸出时间2.5h。9轮扩大验证循环浸出试验运行顺利，Cu和Zn的平均两段总浸出率分别为93.23%和99.47%，而杂质元素Fe和As的浸出率仅15.77%和6.9%,元素硫的硫磺转化率为54.26%。Pb和Ag大部分转化
3、为铅矾、铅铁矾和硫化银而留在浸出渣中，铜锌与铅银彻底分离。关键词：多金属混合精矿；氧压浸出；两段逆流；黝铜矿中图分类号：TF803.21文献标志码：ATwostageadversecurrentoxygenpressureacidleachingofcomplexCu-Pb-Zn-Agbulkconcentrate1,2341XUBin,ZHONGHong,WANGKui-ting,JIANGTao(1.SchoolofResourcesProcessingandBioengineering,CentralSouthUniversi
4、ty,Changsha410083,China;2.SichuanXinyuanMiningLimitedLiabilityCompany,Chengdu610000,China;3.SchoolofChemistryandChemicalEngineer,CentralSouthUniversity,Changsha410083,China;4.EnfeiEngineeringTechnologyLimitedCompany,Beijing100038,China)Abstract:Bymineralogicalanalysis,
5、theprimaryleadandzincmineralsinthecomplexCu-Pb-Zn-Agbulkconcentrateareseparatelygalenaandsphalerite.Whiletheprimarycoppermineraloftheconcentrateandmostofsilverindwellinthetetrahedriteisdifficulttobeleached.ThetreatmentofthecomplexCu-Pb-Zn-Agbulkconcentratebyatwo-stagea
6、dversecurrentoxygenpressureacidleachingwasstudied.Theoptimumprocessoperatingparametersoftheinitialsulfuricacidconcentration150g/L,thefirststagethatliquid-to-solidratioof3,temperatureof135℃,oxygenpartialpressureof0.75MPaandtimeof2.0h,andtheinitialsulfuricacidconcentrati
7、onof80g/L,theoptimumparametersofthesecondstagethatliquid-to-solidratioof3,temperatureof180℃,oxygenpartialpressureof1.0MPaandtimeof2.5hwerebothestablishedbyconditionalexperiments.Theenlargedverificationexperimentwascarriedoutundertheoptimumconditions,andtheaverageleachi
8、ngefficienciesofcopperandzincareseparatelyashighas93.23%and99.47%intheexperimentwhiletheaverageleachingefficienciesof
