带式焙烧工艺处理含砷金矿选矿尾矿为球团矿的工业应用研究
Industrial utilization of arsenic-containing gold dressing tailings as pellet prepared by straight grate process
刘伟 1郭正启 2朱德庆 2潘建 2张武举 1王金 1张映群 3尹福兴3
作者信息
- 1. School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China
- 2. School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China;Low-carbon and Hydrogen Metallurgy Research Center,Central South University,Changsha 410083,China
- 3. Heqing Beiya Mining Co.,Ltd.,Dali 671507,China
- 折叠
摘要
含砷金矿选矿尾矿的利用是世界各国黄金生产企业面临的紧迫问题.本文通过带式焙烧工艺处理了含砷金矿选矿尾矿,热力学分析结果表明,采用带式焙烧工艺可有效脱除含砷尾矿中的砷酸亚铁(FeAsO4)、黄铁矿(FeS2)和氰化钠(NaCN),且黄铁矿和氰化钠的脱除基本在预热阶段完成,而砷酸亚铁的脱除需要在焙烧阶段完成.球团矿在预热过程中由磁铁矿转变为赤铁矿,在焙烧过程中通过赤铁矿(Fe2O3)的微晶结合和高温再结晶而固结.含砷金矿选矿尾矿经过带式焙烧处理,最终得到了砷去除率80.77%、硫去除率88.78%、氰化物去除率99.88%的球团矿,铁含量为61.1%,抗压强度为3071 N,满足了高炉炉料要求.该研究为处理含砷金冶炼尾矿提供了一种工业可行的方法,为黄金生产企业的可持续发展提供了可行的方法.
Abstract
The utilization of arsenic-containing gold dressing tailings is an urgent issue faced by gold production companies worldwide.The thermodynamic analysis results indicate that ferrous arsenate(FeAsO4),pyrite(FeS2)and sodium cyanide(NaCN)in the arsenic-containing gold metallurgical tailings can be effectively removed using straight grate process,and the removal of pyrite and sodium cyanide is basically completed during the preheating stage,while the removal of ferrous arsenate requires the roasting stage.The pellets undergo a transformation from magnetite to hematite during the preheating process,and are solidified through micro-crystalline bonding and high-temperature recrystallization of hematite(Fe2O3)during the roasting process.Ultimately,pellets with removal rates of 80.77%for arsenic,88.78%for sulfur,and 99.88%for cyanide are obtained,as well as the iron content is 61.1%and the compressive strength is 3071 N,meeting the requirements for blast furnace burden.This study provides an industrially feasible method for treating arsenic-containing gold smelting tailings,benefiting gold production enterprises.
关键词
含砷金矿选矿尾矿/球团矿/带式焙烧工艺/资源回收Key words
arsenic-containing gold dressing tailings/pelletizing/straight grate process/recycling引用本文复制引用
基金项目
National Natural Science Foundation of China(52274343)
National Key R&D Program of China(2023YFC3903900)
National Key R&D Program of China(2023YFC3903904)
出版年
2024
NETL
NSTL
万方数据