摘要
西藏某大型铜钼矿石铜品位0.81%,钼品位0.017%,铜、钼分别主要以黄铜矿、辉钼矿的形式存在。选矿厂采用铜钼混合浮选—分离浮选原则流程进行生产,钼精矿品位和回收率较差,铜含量偏高。为获得合格的钼精矿产品,进行铜、钼分离浮选试验。结果表明,以铜品位20.17%、钼品位0.67%的铜钼混合精矿为给矿,在水玻璃用量1 000 g/t、硫化钠用量10 000 g/t、煤油用量80 g/t的条件下,1粗3精—精选3精矿再磨(-0.074 mm 90%)—2次精选闭路试验可获得钼品位46.52%、回收率82.47%、含铜1.21%的合格钼精矿和铜品位20.38%、回收率99.91%的合格铜精矿,金、银主要富集在铜精矿中,品位分别为12.29,562.50 g/t。相比生产指标,钼精矿品位提高10.37个百分点,回收率提高13.94个百分点,铜含量降低2.13个百分点,实现了混合精矿铜、钼的有效分离。试验结果可供选矿厂工艺流程升级改造提供技术依据。
The copper grade of a large copper-molybdenum ore is 0.81%in Tibet,and molybdenum grade is 0.017%,in which copper and molybdenum mainly exist in the form of chalcopyrite and molybdenite respectively.The concentrator adopts the principle flow of copper-molybdenum bulk flotation-separation flotation to produce molybdenum concentrate with poor grade,recovery rate and high copper content.In order to obtain qualified molybdenum concentrate product,copper and molybdenum separation flotation test was carried out.The results showed that taking copper-molybdenum bulk concentrate with copper grade of 20.17%and molybdenum grade of 0.67%as the feeding,under the conditions of water glass dosage 1 000 g/t,sodium sulfide dosage of 10 000 g/t and kerosene dosage 80 g/t,qualified molybdenum concentrate with molybdenum grade of 46.52%,recovery rate of 82.47%,copper content of 1.21%and copper concentrate with copper grade of 20.38%,recovery rate of 99.91%were obtained via one roughing-three cleaning-cleaning 3 concentrate regrinding(-0.074 mm 90%)-two cleaning closed circuit test.Gold and silver were mainly concentrated in copper concentrate,of which grade were 12.29 and 562.50 g/t respectively.Compared with the production indexes,the molybdenum concentrate grade of increased by 10.37 percentage points,recovery rate increased by 13.94 percentage points and copper content decreased by 2.13 percentage points.The effective separation of copper and molybdenum from the bulk concentrate.The test results could provide technical bases for the concentrator process flow upgrading and reforming.
作者
逄军武
Pang Junwu(China National Gold Corporation Tibet Huatailong Mining Development Co.,Ltd.)
出处
《现代矿业》
CAS
2019年第2期108-112,共5页
Modern Mining
关键词
铜钼混合精矿
抑制剂
再磨
铜钼分离浮选
Copper-molybdenum bulk concentrate
Inhibitor
Regrinding
Copper and molybdenum separation flotation
