摘要
某低品位银铅锌多金属硫化矿石含银74 g/t、铅0.36%、锌0.82%。银矿物以脆银矿和辉银矿为主,铅矿物以方铅矿为主,锌矿物以闪锌矿为主,主要脉石矿物为石英,其次是白云母、绿泥石和钾长石。矿石中银铅锌矿物均部分被氧化,大部分铅锌矿物嵌布粒度较粗,少部分嵌布粒度微细,银在铅、锌、硫等矿物中均有分布,且嵌布粒度较细。为确定矿石的选矿工艺,进行了选矿试验研究。结果表明,矿石在磨矿细度为-0.074 mm占55%的情况下,采用银铅混浮再浮锌最后选硫工艺处理矿石,可获得含银8515 g/t、含铅51.64%、含锌4.61%、银回收率42.41%、铅回收率56.04%、锌回收率2.15%的银铅精矿,含锌45.47%、含银1692 g/t、含铅3.48%、锌回收率69.63%、银回收率27.71%、铅回收率12.42%的锌精矿,以及含硫43.79%、含银781 g/t、硫回收率10.56%、银回收率5.63%的硫精矿。
A low-grade silver-lead-zinc multi-metal sulfide ore contains 74 g/t of silver,0.36%of lead,and 0.82%of zinc.The silver minerals are mainly fragile silver ore and argyrite,the lead minerals are mainly galena,the zinc minerals are mainly sphalerite,the main gangue minerals are quartz,followed by muscovite,chlorite and potassium feldspar.The silver-lead-zinc minerals in the ore are all partially being oxideized,most of the lead-zinc minerals are coarse in grain size,and a few are fine-graind,silver is distributed in lead,zinc,sulfur and other minerals,and the grain size is relatively fine.In order to determine the process flow,a beneficiation test was carried out.The results indicated that at the grinding fineness of 55%passing 74μm,via silver-lead combined floatation first and then zinc floatation,finally sulfur flotation test to treat the ore.Silver-lead concentrate which contains 8515 g/t silver,51.64%lead and 4.61%zinc,the recoveries are 42.41%,56.04%and 2.15%respectively.Zinc concentrate which contains 45.47%zinc,1692 g/t silver and 3.48%lead,the recoveries are 69.63%,27.71%and 12.42%respectively.Sulfur concentrate which contains 43.79%sulfur,781 g/t silver,the recoveries are 10.56%and 5.63%respectively.
作者
王伟
Wang Wei(Zijin Mining Group Co.,Ltd)
出处
《现代矿业》
CAS
2020年第2期67-70,共4页
Modern Mining
关键词
低品位
硫化银铅锌多金属矿石
抑锌浮银铅
银铅混浮
Low grade
Silver-lead-zinc multi-metal sulfide ore
Depress zinc and float silver-lead
Silver-lead bulk flotation
