中温氯化焙烧—浸出法从废炉砖中提取稀贵金属  

Extraction of Rare and Precious Metals from Waste Furnace Bricks by Medium-temperature Chlorination Roasting—Leaching Method

作　　者：文堪 李耀山 周华荣 刘远 高昭伟 郭辉 刘吉良 WEN Kan;LI Yaoshan;ZHOU Huarong;LIU Yuan;GAO Zhaowei;GUO Hui;LIU Jiliang(Western Mining Group Technology Development Co.,Ltd.,Xining 810006,China;Qinghai Provincial Key Laboratory of Plateau Mineral Processing Engineering and Comprehensive Utilization,Xining 810006,China;Qinghai Nonferrous Mineral Resources Engineering Technology Research Center,Xining 810006,China;Qinghai Xiyu Non-ferrous Metal Co.,Ltd.,Ge'ermu 816000,China)

机构地区：[1]西部矿业集团科技发展有限公司,西宁810006 [2]青海省高原矿物加工工程与综合利用重点实验室,西宁810006 [3]青海省有色矿产资源工程技术研究中心,西宁810006 [4]青海西豫有色金属有限公司,青海格尔木816000

出　　处：《有色金属工程》2023年第6期60-65,共6页Nonferrous Metals Engineering

基　　金：青海省创新平台建设专项(2022-ZJ-Y09)。

摘　　要：某铜-铅阳极泥侧吹炉炉砖中金银含量较高,为高效综合提取炉砖中的金和银,采用中温氯化焙烧—浸出工艺对该炉砖进行试验。结果表明:在焙烧温度850℃、焙烧时间2 h、氯化钠用量10%、硫代硫酸钠用量8.5%和每吨焙烧渣所需氨水用量200 L、浸出温度25℃、浸出时间5 h的条件下,银浸出率可达96.43%;在硫脲用量0.2 mol/L、硫酸铁用量4 g/L、浸出时间15 h、浸出温度40℃的条件下,金浸出率可达84.68%。该工艺处理含金银废炉砖效果较好,可为含金银固废资源的高效综合利用提供参考。There is a high gold and silver content in the bricks of a copper lead anode mud side blowing furnace.In order to extract gold and silver efficiently and comprehensively from furnace bricks,the medium-temperature chlorination roasting step leaching process was used to test the furnace bricks.The results show that the silver leaching rate can reach 96.43%under the flowing conditions of the roasting temperature 850℃,the roasting time 2 h,the amount of sodium chloride 10%,the amount of sodium thiosulfate 8.5%,the amount of ammonia 200 L per ton of calcined slag,the leaching temperature 25℃,and the leaching time 5 h.The gold leaching rate can reach 84.68%under the conditions of 0.2 mol/L thiourea,4 g/L ferric sulfate,15 h leaching time and 40℃leaching temperature.This process is effective in treating waste furnace bricks containing gold and silver and the research can provide a process reference for the efficient and comprehensive utilization of solid waste resources containing gold and silver.

关 键 词：废炉砖 中温焙烧 浸出 稀贵金属 氯化钠 硫代硫酸盐 硫脲 

分 类 号：TF83[冶金工程—有色金属冶金]