某低品位铜钼矿石铜钼优先浮选试验
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摘要
某低品位斑岩型铜钼矿石铜、钼品位分别为0. 50%、0. 029%,73. 85%的铜以原生硫化铜的形式存在,辉钼矿中的钼占总钼的96. 26%。为回收利用矿石中的铜、钼,经对比试验,确定选择铜钼优先浮选流程进行选矿试验。结果表明,在磨矿细度-0. 074 mm 75%条件下,以石灰为pH调整剂、BK404为捕收剂、BK202为起泡剂,原矿经1粗2扫—再磨(-0. 045 mm 89%)—4精、中矿顺序返回全流程闭路浮选,可获得铜品位22. 45%、铜回收率87. 29%、钼含量1. 69%的铜钼混合精矿,相比2粗1扫—粗精矿再磨(-0. 038 mm 89%)—4精2扫、中矿集中返回全流程闭路浮选,铜回收率高8. 06个百分点,优势比较明显,实现了矿石中铜钼的有效富集回收。
The copper and molybdenum grade of a low grade porphyry copper-molybdenum ore are0. 50% and 0. 029% respectively,in which 73. 85% copper exists in the form of primary copper sulfide and molybdenum among molybdenite accounts for 96. 26% of total molybdenum. In order to recover and utilize copper and molybdenum in the ore,dressing test was conducted choosing copper-molybdenum selective flotation process via contrast test. The results showed that under the condition of grinding fineness-0. 074 mm 75%,used lime as pH regulator,BK404 as collector,BK202 as foaming agent,copper-molybdenum bulk concentrate with copper grade of 22. 71%,copper recovery rate of 79. 23% and molybdenum content of 1. 50% was obtained via one roughing-two scavenging-rough concentrate regrinding(-0. 045 mm 89%)-middlings sequential returning complete flow scheme closed circuit flotation,copper recovery rate improved 8 percent point compared to two roughing-one scavenging-rough concentrate regrinding(-0. 045 mm 89%)-middlings concentrated returning complete flow scheme closed circuit flotation. The process advantage was relatively obvious,effective enrichment and recovery of the copper and molybdenum in the ore were realized.
The copper and molybdenum grade of a low grade porphyry copper-molybdenum ore are0. 50% and 0. 029% respectively,in which 73. 85% copper exists in the form of primary copper sulfide and molybdenum among molybdenite accounts for 96. 26% of total molybdenum. In order to recover and utilize copper and molybdenum in the ore,dressing test was conducted choosing copper-molybdenum selective flotation process via contrast test. The results showed that under the condition of grinding fineness-0. 074 mm 75%,used lime as pH regulator,BK404 as collector,BK202 as foaming agent,copper-molybdenum bulk concentrate with copper grade of 22. 71%,copper recovery rate of 79. 23% and molybdenum content of 1. 50% was obtained via one roughing-two scavenging-rough concentrate regrinding(-0. 045 mm 89%)-middlings sequential returning complete flow scheme closed circuit flotation,copper recovery rate improved 8 percent point compared to two roughing-one scavenging-rough concentrate regrinding(-0. 045 mm 89%)-middlings concentrated returning complete flow scheme closed circuit flotation. The process advantage was relatively obvious,effective enrichment and recovery of the copper and molybdenum in the ore were realized.
引文
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[4]彭伟军,张凌燕,李向益.石墨浮选提纯中矿处理方式研究[J].中国非金属矿工业导刊,2014(2):28-30.
[2]王明芳,徐涛,赵留成,等.某斑岩铜钼矿低碱度铜硫浮选分离研究[J].金属矿山,2012(11):80-83.
[3]胡熙庚.有色金属硫化矿选矿[M].北京:冶金工业出版社,1987.
[4]彭伟军,张凌燕,李向益.石墨浮选提纯中矿处理方式研究[J].中国非金属矿工业导刊,2014(2):28-30.