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1INTaoDUCTI0NSe1ectiveokidationleachingofnickelmatteforniCkelextraction[1]leavesbehindcopperintheleachingresidue,referredtoascopperresidue,whichneedstobefurthertreatedforcopperrec0veryNickelmattecomp0sedprincipallyofsyllthesizednickelandc0ppersuffidehanerals.Nickelinthematteispresentpred0minantlyasheazlewooditeNi3S2andmostlydissolvedfromthematteintheselectiveokidationleaching,whilec0pperoccursinformofchalcociteCu2Sordjur1eiteCu1.98Sinthematteandremainsalm0stintactthroughouttheleaching[2'… 相似文献
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任兴丽蒋兴荣朱复跃魏红军 《四川化工》2014,(1):9-10
研究硝酸、硫酸混酸浸取低品位铜矿,探求低品位铜矿中提取铜最佳工艺条件。结果表明:液固比为4∶1,硫酸浓度50g/L,硝酸浓度150g/L,反应温度80℃,反应时间8小时。在此浸出条件下,铜的浸出率可达96.8%。 相似文献
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从硫酸铵焙烧废旧锂离子电池产物中浸出有价金属 总被引:2,自引:0,他引:2
研究了废旧锂离子电池经(NH4)2SO4焙烧处理后有价金属的浸出行为. 考察了焙烧温度、(NH4)2SO4用量和浸出pH值对焙烧产物中金属元素浸出率的影响,比较了焙烧产物分别在稀硫酸溶液和含氨水与(NH4)2SO4的氨性溶液中的浸出效果. 结果表明,焙烧产物中的Li可被完全浸出,焙烧产物中Cu用氨性溶液浸出时浸出率达97.60%,在稀硫酸溶液中为92.86%,焙烧产物中部分钴以Co3O4的形态存在,浸出率低于68%,当用浓硫酸与水体积比为1:2的硫酸水溶液处理浸出渣时,Co的总浸出率可达99%以上. 相似文献
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采用氯化钠-硫酸混合溶液对铅锌矿难处理酸浸渣进行浸出,对浸出液稀释,制备硫酸铅,考察了氯化钠浓度、液固比、时间、温度和硫酸浓度等因素对酸浸渣的浸出影响和考察稀释倍数、时间等因素对沉淀硫酸铅的影响。结果表明,在氯化钠浓度为330 g/L,液固比为7∶1,时间为1.5 h,温度95℃,硫酸浓度为1 mol/L的条件下,铅的浸出率为82.1%;在浸出液稀释倍数为2.5,静置时间7 h的条件下,硫酸铅的沉淀率为93%,产品纯度为99.1%。铅的回收率为76%,比传统方法提高30%以上。 相似文献
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Ammoniacal leaching and sulfuric acid leaching were explored separately to recover copper from smelter slag. The overall 75% copper recovery was achieved from the smelter slag under optimum condition using ammoniacal leaching. The low copper recovery in this process is directly related to the complex slag mineralogy and dissolution kinetics. To overcome such problems, sulfuric acid leaching was applied separately. This method provided an overall 89% copper recovery under atmospheric condition. The use of sulfuric acid as the leaching agent was found to be more advantageous than ammonia due to the complex interlocking nature of copper bearing particles and different reaction kinetics of the slag. 相似文献
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Leila Derakhshan Samani Franz Glombitza Carsten Pätzold Martin Bertau 《化学,工程师,技术》2023,95(12):2022-2029
The objective of this study was to investigate the leaching of a non-sulfide copper ore by a new bioleaching process, the Ferredox process. In the Ferredox process, Acidithiobacillus ferrooxidans reduces ferric ions and oxidizes sulfur at low pH under anaerobic conditions. In this study, a bacterial culture (mainly A. ferrooxidans) was initially grown aerobically. Bacterial dissolution of iron sludge under anaerobic conditions versus sulfuric acid was compared. An iron slurry sample from the West Rand Ditch near Hoyerswerda, Germany and from the Golestan Mine in Iran was investigated. Two shake flasks each containing an iron slurry and non-sulfidic Fe/Cu ore were used. One shake flask each was subjected to an anaerobic process by A. ferrooxidans, while the other sample was leached with dilute sulfuric acid. In the chemical leaching, the amount of dissolved copper was 2.5 %, only slightly higher than in the bioleaching. In a subsequent anaerobic column leaching with A. ferrooxidans, 35 % of the contained copper was mobilized from 1366 g ore. 相似文献
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