悬浮磁化焙烧-磁选法高效利用铁尾矿  

Efficient Utilization of Iron Tailings by Using the Suspension Magnetization Roasting-Magnetic Separation Method

作　　者：宋紫欣 谢海云[1,2,3] 祁磊 晋艳玲[1] 冯梦菲 郭图悦 李建娟 刘殿文 SONG Zixin;XIE Haiyun;QI Lei;JIN Yanling;Feng Mengfei;Guo Tuyue;Li Jianjuan;LIU Dianwen(Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China;Yunnan Key Laboratory of Green Separation and Enrichment of Strategic Mineral Resources,Kunming Yunnan 650093,China;Southwest United Graduate School,Kunming Yunnan 650500,China;Heqing Beiya Mining Co.,Ltd,Yunnan Gold and Mining Group,Dali Yunnan 671000,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093 [2]云南省战略金属矿产资源绿色分离与富集重点实验室,云南昆明650093 [3]西南联合研究生院,云南昆明650500 [4]云南黄金集团鹤庆北衙矿业有限责任公司,云南大理671000

出　　处：《矿物学报》2024年第4期559-569,共11页Acta Mineralogica Sinica

基　　金：国家自然科学基金资助项目(编号:52064027);云南省重大科技专项(编号:202202AG050015)。

摘　　要：铁尾矿作为一种产出量大、储存量大的工业固体废物,长期堆存已对生态环境造成巨大负担。为实现资源可持续利用,进一步回收铁尾矿中有价元素铁,本文针对云南大理某以褐铁矿为主的铁尾矿,在进行化学成分分析、粒度分析等基础上,提出了悬浮磁化焙烧-磁选回收工艺。在CO浓度为30%、总气量450 ml/min、还原剂配比为CO:H_(2)=1:3、焙烧温度520℃、焙烧时间20 min、一段磁场强度1 600 Gs、二段磁场强度2 000 Gs的最佳试验条件下,可将该尾矿铁品位由23.50%提升至57.37%,铁回收率为59.89%,产率为30.15%,实现了该铁尾矿资源的高效利用。The iron tailings is a kind of largely output and largely stored industrial solid waste.The long-term stored iron tailing has caused a huge impact on the ecological environment.In order to realize the sustainable utilization of resources and further to recover the valuable element of iron in the iron tailings,a process of suspension magnetization roastingmagnetic separation has been proposed to process a limonite-dominated iron tailings in the Dali area,Yunnan Province based on the chemical composition analysis,XRD analysis and particle size analysis.Under the optimum experimental condition with CO concentration of 30%,total gas volume of 450 ml/min,reducing agent ratio of CO/H_(2)=1:3,roasting temperature of 520°C,roasting time of 20 min,first-stage magnetic field intensity of 1600 Gs and second-stage magnetic field intensity of 2000 Gs,the tailings sample wtih Fe_(2)O_(3) grade of 23.50%was processed using the above method.The obtained processing product(iron concentrate)has Fe_(2)O_(3) grade of 57.37%at recovery rate of 59.89%and yielding rate of 30.15%.Therefore,the efficient resource utilization of the iron tailings has been realized.

关 键 词：铁尾矿 悬浮磁化焙烧 磁选 高效利用 

分 类 号：TP20[自动化与计算机技术—检测技术与自动化装置]