某含银低品位铅锌矿石选矿试验研究
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摘要
某硫化铅锌矿石含铅、锌分别为2.25%、1.96%,伴生银含量为13.20g/t,主要铅锌矿物为方铅矿、闪锌矿,它们的共生关系密切、嵌布关系复杂。为高效综合回收利用该资源,进行了选矿试验研究。结果表明,采用优先浮铅再浮锌的流程,在原矿磨矿细度-74μm占65.00%,以石灰为矿浆pH调整剂、硫酸锌为抑制剂、乙硫氮为捕收剂,经一次粗选、二次扫选—铅粗精矿再磨至-37μm占82.70%后二次精选选铅,选铅尾矿以石灰为矿浆pH调整剂、硫酸铜为活化剂、丁基黄药为捕收剂,经一次粗选、二次扫选及二次精选选锌,获得了铅品位66.43%、银品位309.71g/t、铅回收率95.97%、银回收率74.87%的铅精矿,以及锌品位53.35%、锌回收率90.35%的锌精矿。
A lead-zinc ore with zinc of 2.25%,and lead of 1.96%,contains associated silver with grade at 13.20 g/t.Lead and zinc in the ore mainly exist in the form of galena and sphalerite which are closely associated and complex disseminated with each other.In order to realize the high efficient exploitation and utilization of the resources,beneficiation tests of the ore were made.Results obtained by differential flotation showed that,when the grinding fineness was 65.00%passing 74μm,adopting lime as pulp pH regulator,zinc sulfate as depressor,diethyldithiocarbamate as collector,via the process of lead concentration by one roughing,two scavenging and regrinding the lead rough concentrate with fineness at82.70% passing 37μm,then followed by two cleaning;for the tailing of lead flotation,adopting lime as pulp pH regulator,copper sulphate as activator,butyl xanthate as collector,via the flowsheet of zinc concentration by one roughing,two scavenging and two cleaning.Finally,results showed that the lead concentrate with lead grade of 66.43%and lead recovery of 95.97%,silver grade of 309.71 g/t and silver recovery of 74.87%,and zinc concentrate with zinc grade of 53.35%,zinc recovery of 90.35%.
A lead-zinc ore with zinc of 2.25%,and lead of 1.96%,contains associated silver with grade at 13.20 g/t.Lead and zinc in the ore mainly exist in the form of galena and sphalerite which are closely associated and complex disseminated with each other.In order to realize the high efficient exploitation and utilization of the resources,beneficiation tests of the ore were made.Results obtained by differential flotation showed that,when the grinding fineness was 65.00%passing 74μm,adopting lime as pulp pH regulator,zinc sulfate as depressor,diethyldithiocarbamate as collector,via the process of lead concentration by one roughing,two scavenging and regrinding the lead rough concentrate with fineness at82.70% passing 37μm,then followed by two cleaning;for the tailing of lead flotation,adopting lime as pulp pH regulator,copper sulphate as activator,butyl xanthate as collector,via the flowsheet of zinc concentration by one roughing,two scavenging and two cleaning.Finally,results showed that the lead concentrate with lead grade of 66.43%and lead recovery of 95.97%,silver grade of 309.71 g/t and silver recovery of 74.87%,and zinc concentrate with zinc grade of 53.35%,zinc recovery of 90.35%.
引文
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[9]李奇勇,李强,吴婷婷.福建某低品位难选铅锌矿选矿试验研究[J].有色金属(选矿部分),2017(3):23-27.
[10]石贵明,周意超,刘琴,等.广东大尖山某铅锌多金属矿石选矿试验[J].金属矿山,2018,47(4):99-104.
[2]敖顺福,惠世和,王艳民,等.勐糯铅锌矿选矿工艺的生产现状及优化探讨[J].有色金属工程,2017,7(5):70-74.
[3]尤腾胜,文书明,胡天喜,等.某低品位铅锌矿的选矿工艺试验研究[J].矿产保护与利用,2008(1):26-29.
[4]田江涛,王伟之,齐向红,等.河北某低品位铅锌矿石选矿试验[J].金属矿山,2018(7):108-112.
[5]周涛,徐飞飞.西藏某难分离铅锌矿石选矿试验研究[J].矿冶,2016,25(2):19-23.
[6]陈丽荣,张周位,杨国彬.丹寨县某铅锌矿选矿试验[J].金属矿山,2014,43(3):84-87.
[7]沈卫卫,赵业雄,李峰.乌拉根铅锌矿选矿工艺优化和生产实践[J].中国矿业,2016,25(3):112-116.
[8]张德义,田江涛,金之易,等.提高某矽卡岩型铅锌矿选矿指标的工业实践[J].有色金属(选矿部分),2017(2):20-22.
[9]李奇勇,李强,吴婷婷.福建某低品位难选铅锌矿选矿试验研究[J].有色金属(选矿部分),2017(3):23-27.
[10]石贵明,周意超,刘琴,等.广东大尖山某铅锌多金属矿石选矿试验[J].金属矿山,2018,47(4):99-104.