云南某金矿氰化尾渣中铁回收工艺改进试验研究
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摘要
针对云南某金矿氰化尾渣铁回收过程中存在磁铁矿回收率偏低的问题,进行了磨矿细度、磁感应强度、脱泥磁选的试验研究。结果表明,现场原矿磨矿粒度过细是导致磁铁矿回收率偏低的主要原因,磨细后磁铁矿主要损失在褐铁精矿中。对现场获得的褐铁精矿进行的实验室弱磁选试验结果表明,能从褐铁精矿中获得产率约为8%的磁铁矿,磁铁矿中铁的总回收率可提高15%左右。试验结果应用于现场生产,对现场工艺流程进行改进,将褐铁粗精矿引流至弱磁精选进一步回收磁铁矿,磁铁精矿中铁回收率提高了13.92%,总铁回收率提高了11.23%,吨矿价值提高了55.31元,不仅可实现资源的综合利用回收,同时可为企业增效创收。
In order to solve the problem of low recovery rate of magnetite in iron recovery from cyanide tailings of a gold mine from Yunnan province,magnetic separation with different grinding fineness,different magnetic induction intensity and magnetic with desliming were carried out.The main reason for the low recovery rate of magnetite after grinding is the fine grinding size of the raw ore.The main loss of magnetite after grinding is in limonite concentrate.The field low-intensity magnetic separation test of limonite concentrate obtained in the laboratory can obtain magnetite with a yield of about 8%,and the recovery of iron in magnetite can be increased by about 15%.The test results were applied to the field production,and the process flow was improved.The crude concentrate of lignite was drained to the weak magnetic separation for further recovery of magnetite.The final recovery rate of iron in the field magnetite was increased by 13.92%,the total iron recovery rate was increased by 11.23%,and the value of ore per ton was increased by 55.31$,the comprehensive utilization of resources was realized.At the same time,it has achieved synergy and income generation for enterprises.
In order to solve the problem of low recovery rate of magnetite in iron recovery from cyanide tailings of a gold mine from Yunnan province,magnetic separation with different grinding fineness,different magnetic induction intensity and magnetic with desliming were carried out.The main reason for the low recovery rate of magnetite after grinding is the fine grinding size of the raw ore.The main loss of magnetite after grinding is in limonite concentrate.The field low-intensity magnetic separation test of limonite concentrate obtained in the laboratory can obtain magnetite with a yield of about 8%,and the recovery of iron in magnetite can be increased by about 15%.The test results were applied to the field production,and the process flow was improved.The crude concentrate of lignite was drained to the weak magnetic separation for further recovery of magnetite.The final recovery rate of iron in the field magnetite was increased by 13.92%,the total iron recovery rate was increased by 11.23%,and the value of ore per ton was increased by 55.31$,the comprehensive utilization of resources was realized.At the same time,it has achieved synergy and income generation for enterprises.
引文
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[2]肖坤明,谢文清,郑新烟,等.福建某氰化尾渣综合利用试验研究[J].矿产综合利用,2013(5):72-75.
[3]尚德兴,陈芳芳,张亦飞,等.还原焙烧-磁选回收氰化尾渣中铁的试验研究[J].矿冶工程,2011,31(5):35-38.
[4]罗良飞,余永富,陈雯,等.某含铁浸金渣闪速焙烧磁选试验研究[J].矿冶工程,2009,29(3):26-28.
[5]白丽梅,刘丽娜,李萌,等.张家口地区鲕状赤铁矿还原焙烧-弱磁选试验研究[J].中国矿业,2009,18(3):83-87.
[6]张汉泉,任亚峰,管俊芳.难选赤褐铁矿焙烧-磁选试验研究[J].中国矿业,2006,15(5):44-48.
[7]高俊峰,李晓波.我国氰化尾渣的利用现状[J].矿业工程,2005(4):38-39.