山东某长石矿石除铁增白选矿试验

Mineral Processing Experiment on Iron Removal and Whitening of Feldspar Ore in Shandong

山东某长石矿石属高含铁量长石矿石,铁赋存于铁矿物、云母、黄铁矿及一些含铁碱金属硅酸盐中。为了从该矿石获得陶瓷工业用高品级钾长石原料,对其开展了除铁增白选矿试验研究。试验根据矿石性质,采用磨矿—按20μm脱泥—高梯度磁选脱除磁性铁—乙黄药浮选脱除黄铁矿—十二胺+煤油浮选脱除云母—ZL-1浮选脱除含铁碱金属硅酸盐工艺流程,经系统的条件试验,最终获得了产率为76.24%、Al2O3回收率为80.31%的长石精矿,其Al2O3含量为16.05%、K2O+Na2O含量为12.50%、Fe2O3含量为0.09%、白度为67.26%,达到陶瓷行业用钾长石精矿一级品质量标准。

A feldspar ore in Shandong province belongs to high-Fe feldspar ore,and ferrum mainly exists in form of iron minerals,mica,pyrite,and Fe-bearing alkali metal silicate.Experiments of iron removal and whitening were carried out in order to obtain high grade potassium feldspar as raw material for ceramic industry.Based on the ore property,the experiment was carried out through the process of grinding,desliming at 20 μm,magnetic iron removal by high gradient magnetic separation,pyrite removal by flotation using ethyl xanthate as collector,mice removal by flotation using lauryl amine ＋ kerosene as collector,iron content alkali metal silicate removal by flotation using ZL-1 as collector.Through the experiment,feldspar concentrate with yield of 76.24%,Al2O3 recovery of 80.31%,Al2O3,K2 O ＋ Na2 O,Fe2O3,content of 16.05%,12.50%,0.09%,whiteness of 67.26% is achieved respectively,which can reach the first-grade K-feldspar quality standards for ceramic industry.