选冶联合综合回收铅银渣中金银试验研究  

Experimental Research on Comprehensive Recovery Gold and Silver from Lead-silver Rresidue by Dressing-metallurgy Technology

作　　者：郭艳华[1] 杨俊龙[1] 廖雪珍[1] 彭建城[1] 彭贵熊 

机构地区：[1]西北矿冶研究院,甘肃白银730900

出　　处：《有色金属（选矿部分）》2016年第2期34-37,64,共5页Nonferrous Metals（Mineral Processing Section）

基　　金：白银市科技计划项目(2014-2-7G)

摘　　要：为充分开发和利用二次资源,对铅银渣进行试验研究。渣中银品位为158.3 g/t,金品位为1.02 g/t,具有较高的回收价值。铅银渣具有水分大、可溶物含量高,粒度较细等特点。试验采用硫酸化焙烧—洗涤—磨矿后浮选的工艺,当硫酸用量为2.0 kg/t,焙烧温度为800℃,焙烧时间为4 h,磨矿细度-44μm含量占90%,T19用量为2.0 kg/t,硫酸铜用量为400g/t,酯-30用量为300 g/t时,进行闭路试验。经过一次粗选、一次精选、一次扫选、中矿单独处理的闭路流程,可获得银品位为1 755.48 g/t,银回收率为84.17%的银精矿,银精矿中金的品位为12.16 g/t,金回收率为90.52%的较好指标,实现了铅银渣的综合利用。In order to develop and utilizes secondary resources fully,we do experimental study on lead-silver residue. Lead-silver residue with the grade of silver is 158. 3 g / t,gold is 1. 02 g / t,having a high recovery value.With the characteristics of lead-silver residue has high moisture,high soluble matter content,and fine particle size.Using sulfatizing roasting-washing-flotation technology,and with the amount of sulfuric acid for 2. 0 kg / t,roasting temperature for 800 ℃,roasting time for 4 h,grinding fineness for 44 μm 90%,T19 dosage for 2. 0 kg / t,copper sulfate dosage for 400 g / t,ester-30 dosage for 300 g / t,closed-circuit experiment was carried out. Through the one roughing,one cleaning,one scavenging of a closed-circuit process,middling selected alone,can obtain good silver concentrate index with the grade of silver for 1 755. 48 g / t,the silver recovery was 84. 17%,with the grade of gold for 12. 16 g / t,the gold recovery was 90. 52%,realized the comprehensive recovery of lead-silver residue.

关 键 词：铅银渣 硫酸化焙烧 洗涤 浮选 

分 类 号：TD913[矿业工程—选矿] TD953