某红土镍矿选矿除铬试验研究

Experimental Study on Chromium Removal in Mineral Processing of a Certain Laterite Nickel Mine

以某红土镍矿为研究对象,针对其含有的铬铁矿对后续湿法冶炼不利的问题,探索采用选矿工艺去除对铬铁矿的可行性。试验结果表明,红土镍矿采用水力旋流器分级-摇床重选-磁选工艺流程可以有效去除红土镍矿中的铬铁矿,铬铁矿去除率为50.99%;铬铁矿的铬品位为34.32%,铬铁比为2.03,满足冶炼要求,实现了资源的综合利用。同时,湿法冶炼产品中的镍钴分布率分别为99.51%和97.17%,镍钴损失率较低。本研究可以实现红土镍矿中铬铁矿地有效去除,为该类型红土镍矿的综合开发利用提供重要指导。

Taking a certain laterite nickel ore as the research object,this study explores the feasibility of using mineral processing technology to remove the chromite,in response to the problem of its containing chromite being unfavorable for subsequent wet smelting.The experimental results show that the use of a hydraulic cyclone classification-shaking table gravity-magnetic separation process can effectively remove chromite from laterite nickel ore,with a chromite removal rate of 50.99%.The chromium grade of chromite ore is 34.32%,and the chromium iron ratio is 2.03,which meets the smelting requirements and achieves comprehensive resource utilization.Meanwhile,the distribution rates of nickel and cobalt in wet metallurgical products are 99.51%and 97.17%,respectively,indicating a relatively low loss rate of nickel and cobalt.This study can effectively remove chromite from laterite nickel ore,providing important guidance for the comprehensive development and utilization of this type of laterite nickel ore.