某贫硫化物含铅银难选矿石选矿试验研究  

Experimental study on the beneficiation of a refractory lead-bearing silver ore with poor sulfide content

作　　者：黄宇林 杨宁 Huang Yulin;Yang Ning(Luoyang Kunyu Mining Co.,Ltd.)

机构地区：[1]洛阳坤宇矿业有限公司,河南省洛阳市471700

出　　处：《黄金》2021年第10期65-68,共4页Gold

摘　　要：河南某含铅银矿石具有氧化率高、含泥量大的特点,属贫硫化物含铅银氧化矿石,现场生产中尾矿银流失率高。针对矿石性质,进行了原矿重选-重选尾矿浮选试验研究,考察了不同磨矿细度、药剂用量下的选别效果。结果表明:采用原矿重选-重选尾矿浮选闭路流程,在碳酸钠用量300 g/t、硫化钠用量200 g/t及其他最佳试验条件下,可获得银品位8892.40 g/t、铅品位18.35%的重选精矿,银品位8855.50 g/t、铅品位17.87%、铜品位1.560%的浮选精矿;银总回收率为81.31%、铅总回收率为71.92%、铜总回收率为73.12%,各金属都得到了较好的富集回收。A refractory lead-bearing silver ore from Henan is characterized by high oxidation rate,high mud content,and belongs to lead-bearing silver ore with poor sulfide content.In production,the silver loss rate of tailings is high.Based on the ore property,experimental study on run-of-mill ore gravity separation-gravity separation tailings flotation was carried out and the beneficiation performance under different grinding fineness and reagent regime was investigated.The results show that when the dosage of Na 2CO 3 is 300 g/t,Na 2S is 200 g/t and other parameters are optimal for the closed-circuit flowsheet of run-of-mill ore gravity separation-gravity separation tailings flotation,the gravity concentrate with silver grade of 8892.40 g/t,lead grade of 18.35%can be obtained,as well as the flotation concentrate with silver grade of 8855.50 g/t,lead grade of 17.87%,and copper grade of 1.560%;the total recovery rates of silver,lead and copper are 81.31%,71.92%and 73.12%respectively.Each metal gets well concentrated and recovered.

关 键 词：银矿石 浮选 氧化矿石 重选 铅 

分 类 号：TD953[矿业工程—选矿]