云南某钛铁矿选矿试验研究

Experimental study on beneficiation of a titaniferous iron ore in Yunnan

以云南某低品位钛铁矿为研究对象,原矿含钛(TiO_(2))仅为5.67%,大部分单独存在于钛铁矿中,占矿石中TiO_(2)总量的83.56%,其余部分以类质同象的形式存在于磁铁矿和辉石中,占16.44%,脉石矿物主要包括石英、绿泥石等。针对该钛铁矿开展选矿试验,目的是通过选矿试验研究,寻求合理的工艺流程,对该资源的开发提供理论依据,可以使钛矿资源得到充分利用。首先查明了该矿石的化学组分、矿物组成,其次进行了磨矿细度、弱磁磁场强度、强磁磁场强度等工艺参数条件研究。在此基础上通过"磨矿-弱磁-强磁-强磁-分级摇床重选-中矿再磨再选"联合工艺流程,最终可获得TiO_(2)品位为45.06%的钛精矿,回收率(对原矿)为53.73%;指标较好,实现了对目的矿物的有效回收。

A low-grade ilmenite ore in Yunnan province contains only 5.67%titanium(TiO_(2)),and most of Ti exists in ilmenite alone,occupying 83.56%of the total TiO_(2) in the ore.The rest of 16.44%Ti exists in magnetite and pyroxene in a homogeneous form,and the vein minerals mainly include quartz and chlorite,etc.The beneficiation test for the ilmenite was carried out to seek a reasonable process flow and provide a theoretical basis for the development of this resource,which can make a sufficient use of titanium ore resources.Firstly,the chemical components and mineral compositions of the ore were identified.Then,the process parameters such as grinding fineness,weak magnetic field strength and strong magnetic field strength were studied.On this basis,the combined process of“grinding-weak magnetic separation-strong magnetic separation-strong magnetic separation-graded shaking table re-election-medium ore regrinding and re-election”was proposed.The titanium concentrate containing 45.06% TiO_(2) can be finally obtained,with the recovery rate(for the original ore)of 53.73%.The proposed process realizes effective recovery of the target minerals with a well index.