氯化挥发—磁选联合法回收针铁矿渣中的有价金属  

Recovery of Valuable Metals from Gothite Slag by Chloride Roasting Combined with Magnetic Separation

作　　者：高文成 温建康 邓静娴 蔡镠璐 GAO Wen-cheng;WEN Jian-kang;DENG Jing-xian;CAI Liu-lu(GRINM Resources and Environment Tech.Co.,Ltd.,Beijing 101407,China;GRIMAT Engineering Institute Co.,Ltd.,Beijing 101407,China)

机构地区：[1]有研资源环境技术研究院(北京)有限公司,北京101407 [2]有研工程技术研究院有限公司,北京101407

出　　处：《有色金属（冶炼部分）》2022年第1期1-7,共7页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家重点研发计划项目(2018YFC1900403)。

摘　　要：针铁矿渣是一种具有较高回收价值的固废资源。以广东某冶炼厂针铁矿渣为研究对象,采用氯化挥发—磁选联合的方法回收其中的锌、铟和铁资源。首先通过工艺矿物学查明了渣中多元素含量和主要有价金属铁、锌和硫元素的赋存状态;然后考查了氯化挥发过程中主要因素的影响,得到较优的试验条件为:氯化钙添加量20%、碳粉添加量为针铁矿渣量的40%、球团粒度10~20 mm、氯化挥发温度1000℃、反应时间4 h,此时锌和铟的挥发率分别为72.11%和94.32%;最后对氯化挥发渣进行了强磁—弱磁的磁选试验,得到铁品位达到50.74%的铁精矿产品。为针铁矿渣中有价金属铁、锌和铟的高效回收提供了理论和试验基础。Gothite slag is one kind of solid waste,which has high recovery value for utilization.A novel process to extract valuable metals such as zinc,indium,and ferrous from gothite slag by chloride roasting combined with magnetic separation was proposed.First,contents of metals and dissemination characteristics of gothite slag were determined by MLA.Then,effect factors were systemically studied in chloride roasting,volatilization rate of zinc and indium is 72.11% and 94.32% respectively under the optimum condition including CaCl_(2) addition of 20%,addition of carbon powder of 40%,particle size of 10-20 mm,chloride roasting temperature of 1000℃,and roasting time of 4 h.Finally,chloride roasting residue was crushed,milled and separated by high-intensity and low-intensity magnetic field for producing iron ore concentrate with Fe content of 50.74%.This study will provide theoretical and experimental fundamentals for recovering zinc,indium and ferrous from gothite slag.

关 键 词：针铁矿渣 氯化挥发 磁选 回收 有价金属 

分 类 号：TF803.12[冶金工程—有色金属冶金]