市政污泥与铁尾矿协同磁化焙烧回收铁资源的研究  

Recovery of Iron Resources by Synergistic Magnetization Roasting of Municipal Sludge and Iron Tailings

作　　者：彭岱 邓金环 宁寻安[1,2] 陈嘉宜 叶文盛 张鼎元 PENG Dai;DENG Jinhuan;NING Xun’an;CHEN Jiayi;YE Wensheng;ZHANG Dingyuan(School of Environmental Science and Engineering,Guangdong University of Technology,Guangzhou Guangdong 510006;Institute of Environmental Health and Pollution Control,Guangdong Key Laboratory of Environmental Catalysis and Pollution Control,Guangzhou Guangdong 510006)

机构地区：[1]广东工业大学环境科学与工程学院,广东广州510006 [2]广东省环境催化与健康风险控制重点实验室环境健康与污染控制研究院,广东广州510006

出　　处：《环境卫生工程》2024年第4期17-22,共6页Environmental Sanitation Engineering

基　　金：广东省自然科学基金面上项目(2024A1515010315)。

摘　　要：我国铁尾矿堆存量超1.00×10^(10)t,约50%为难选赤/褐铁矿,常规分选方法效率低、成本高。磁化焙烧是难选铁矿资源化最有效的技术,铁矿物高效磁化及杂质分离是关键难点。本研究利用市政污泥(含水率35%)与铁尾矿协同磁化焙烧技术,从典型含硫和多金属的难选铁尾矿中回收铁资源。最佳焙烧条件(焙烧温度800℃、焙烧时间30 min、市政污泥掺烧量15%)下,得到的铁精矿铁品位为63.11%,铁回收率为96.23%,铁精矿中的硫、磷、铝等杂质含量均达到GB/T 36704—2018铁精矿中C60的指标要求。本研究为铁尾矿的高效资源化提供了新思路。The stockpile of iron tailings in China exceeds 10 billion tons,with about half consisting of refractory hematite/limonite ores.The efficiency of conventional sorting methods for these ores was low and costly.Magnetization roasting is the most effective technology for utilizing refractory iron ore,with the primary challenges being the efficient magnetization of iron minerals and the separation of impurities.In this study,municipal sludge(35%moisture content)and iron tailings were used to recover iron resources from typical sulfur-bearing and polymetallic refractory iron tailings by synergistic magnetization roasting technology.Under optimal roasting conditions(roasting temperature of 800℃,roasting time of 30 min,and municipal sludge doping of 15%),the resulted iron concentrate achieved an iron grade of 63.11%,an iron recovery rate of 96.23%,and impurity contents of sulfur,phosphorus,and aluminum all met the index requirements of C60 in GB/T 36704—2018 IronOreConcentrate.The study provided a new approach for the efficient resource utilization of iron tailings.

关 键 词：市政污泥 磁化焙烧 资源化 铁尾矿 

分 类 号：X703[环境科学与工程—环境工程] X753