锌浸出渣中银浮选工艺优化工业试验
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摘要
基于前期的实验室研究,对河南某锌冶炼厂低酸浸出渣浮选回收银浮选优化工艺进行了工业试验。采用原生产流程,调整优化生产现场矿浆浓度(保持在30%以上)和药剂制度(采用Z-200作辅助捕收剂,活性炭为载体,不再添加黄药)、工艺设备及其工作参数后进行了工业试验。结果表明,工艺优化后,银精矿品位由3000 g/t提高至6740.4 g/t,银回收率由60%~64%提高到73.17%;精矿产率降低到原工艺的三分之一,减少了银精矿所带走的锌损失;精矿中金品位由1.5 g/t提高到5.3 g/t以上,提高了金的回收率。
Based on the previous laboratory results, an industrial test was carried out on the process optimization for silver flotation from low acid-leached residues of some zinc hydrometallurgy factory in Henan. Adopting the original production process, we adjusted and optimized the pulp density, reagent system, process equipment and its working parameters on the production site. The pulp density was kept above 30% and the reagent system consisted of Z-200 as the auxiliary collector and activated carbon as the vector. No more butyl xanthate was added into the system. The test showed that, after the process optimization, the silver concentrate grade was elevated from about 3000 to 6740.4 g/t and the recovery rose to 73.17% from 60%~64%. Meanwhile, the silver concentrate amount was cut by about 66.6%, which greatly reduced zinc loss, in return. Moreover the gold concentrate grade was increased from 1.5 to 5.3 g/t, and the gold recovery was improved.
Based on the previous laboratory results, an industrial test was carried out on the process optimization for silver flotation from low acid-leached residues of some zinc hydrometallurgy factory in Henan. Adopting the original production process, we adjusted and optimized the pulp density, reagent system, process equipment and its working parameters on the production site. The pulp density was kept above 30% and the reagent system consisted of Z-200 as the auxiliary collector and activated carbon as the vector. No more butyl xanthate was added into the system. The test showed that, after the process optimization, the silver concentrate grade was elevated from about 3000 to 6740.4 g/t and the recovery rose to 73.17% from 60%~64%. Meanwhile, the silver concentrate amount was cut by about 66.6%, which greatly reduced zinc loss, in return. Moreover the gold concentrate grade was increased from 1.5 to 5.3 g/t, and the gold recovery was improved.
引文
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[8]杜新玲,王红伟,何意,等.提高锌浸出渣中银浮选回收率的研究[J].贵金属,2018,39(1):51-55.DU X L,WANG H W,HE Y,et al.Study on improving silver flotation recovery from zinc-leached residues[J].Precious metals,2018,39(1):51-55.
[2]魏威,陈海清,陈启元,等.湿法炼锌浸出渣处理技术现状[J].湖南有色金属,2012,28(6):37-70.WEI W,CHEN H Q,CHEN Q Y,et al.Progress in the treatment technology of zinc leaching residue[J].Hunan nonferrous metals,2012,28(6):37-70.
[3]赵俊利,葛英勇,杨志超,等.浮选回收某锌渣中银的中试研究[J].中国矿业,2014,23(10):128-132.ZHAO J L,GE Y Y,YANG Z C,et al.Study on pilot-test of silver recovery from zinc slag by flotation[J].China mining magazine,2014,23(10):128-132.
[4]黄万抚,钟祥熙.湿法炼锌酸浸出渣浮选回收银试验[J].贵金属,2015,36(3):19-25.HUANG W F,ZHONG X X.Recovering silver from acid-leaching residues of zinc ore by flotation[J].Precious metals,2015,36(4):19-25.
[5]周玉琳.提高锌浸出渣中银浮选回收率的工艺改进[J].有色金属(选矿部分),2014(1):39-42.ZHOU Y L.The process improvements for improving silver flotation recovery from zinc leaching residues[J].Nonferrous metals(Mineral processing section),2014(1):39-42.
[6]王建芳,杨和平,庄肃凯,等.从锌冶炼废渣中回收银的生产实践[J].有色金属(冶炼部分),2014(2):47-49.WANG J F,YANG H P,ZHUANG S K,et al.Plant practice of silver recovery from zinc smelting waste residue[J].Nonferrous metals(Extractive metallurgy),2014(2):47-49.
[7]陆智,程秦豫,潘莲辉.从锌冶炼酸浸渣中回收银[J].有色金属(选矿部分),2015(4):51-53.LU Z,CHENG Q Y,PAN L H.Silver recovery from hydrometallurgical zinc residue[J].Nonferrous metals(Mineral processing section),2015(4):51-53.
[8]杜新玲,王红伟,何意,等.提高锌浸出渣中银浮选回收率的研究[J].贵金属,2018,39(1):51-55.DU X L,WANG H W,HE Y,et al.Study on improving silver flotation recovery from zinc-leached residues[J].Precious metals,2018,39(1):51-55.