红土镍矿浸渣选铁试验研究  

Experimental Study on Iron Recovery from Leaching Residue of Lateritic Nickel Ore

作　　者：罗良飞[1] 李宗蔚 钟志刚 蒋江波 LUO Liangfei;LI Zongwei;ZHONG Zhigang;JIANG Jiangbo(Changsha Research Institute of Mining and Metallurgy Co Ltd,Changsha 410012,Hunan,China)

机构地区：[1]长沙矿冶研究院有限责任公司,湖南长沙410012

出　　处：《矿冶工程》2023年第5期47-49,53,共4页Mining and Metallurgical Engineering

基　　金：国家重点研发计划(2021YFC2902504)。

摘　　要：针对某含铁51.38%、含硫2.01%的红土镍矿浸渣进行了离心选矿、磁选、磁化焙烧等试验研究。结果表明,磁化焙烧-磁选工艺是该红土镍矿浸渣选铁的高效分选工艺。煤基还原-弱磁选获得了精矿TFe品位62.77%、回收率94.04%的指标;气基还原-弱磁选获得了精矿TFe品位68.77%、回收率95.15%、精矿中杂质硫含量0.12%的指标,可达到铁精矿质量要求;直接还原-弱磁选可获得精矿TFe品位90.89%、回收率88.90%的指标,但存在精矿中硫含量偏高的问题。Experimental studies were carried out for iron recovery from the leaching residue of lateritic nickel ore containing 51.38%TFe and 2.01%S,by adopting processing techniques of centrifugal separation,magnetic separation and magnetic roasting.It is found that the process of magnetic roasting followed by magnetic separation is an efficient technique to recover iron from such leaching slag.It is shown that the process of coal⁃based reduction followed by low⁃intensity magnetic separation(LIMS)can produce the concentrate grading 62.77%TFe at 94.04%recovery,and the process of gas⁃based reduction followed by LIMS leads to the concentrate grading 68.77%TFe at 95.15%recovery,with sulfur content of 0.12%in the impurity,which can meet the quality standard for iron concentrate.Although the process of direct reduction followed by LIMS can produce the concentrate grading 90.89%TFe at 88.90%recovery,it is shown that there is higher content of sulfur in the concentrate.

关 键 词：红土镍矿 浸出渣 磁选 磁化焙烧 煤基还原 气基还原 直接还原 离心选矿 

分 类 号：TD981[矿业工程—选矿]