贫磁铁矿阳离子反浮选降硅试验

Reverse flotation tests for silicon dioxide reduction of low-grade magnetite with cationic collector

湖北省陨西具有较为丰富铁矿资源,矿石中铁含量较低,原矿中全铁(TFe)含量约15%左右,属于贫磁铁矿。铁矿物的嵌布粒度较细,通过三次阶段磨矿-弱磁选得到铁精矿全铁品位仅为51.76%,而且Al2O3、SiO2含量高。对该矿弱磁选精矿进行低温阳离子反浮选提铁研究,在完成浮选条件试验的基础上,进行一粗一精两扫开路反浮选小型闭路流程试验,最终获得较好指标:精矿产率为63.10%,精矿品位为64.19%,回收率为78.32%,SiO2的脱除率达到50.36%,Al2O3可满足高炉冶炼要求。

There are rich iron ore resource in Yunxi, but iron content is about 15%, belongs to low- grade magnetite, particle size is so fine that the grade of concentrate is only 51.76 %, contents of A12 03, SiO2 are relatively high through three-stage grinding-weak magnetic separation. Study on reverse flotation for silicon dioxide reduction of low-grade magnetite with cationic collector, On the basis of single condition flotation technical parameters tests, Good flotation results were obtained at last With one roughing, once cleaning and twice scavenging closed-circuit process： the concentrate production rate is 63. 10%, grade is 64.19% ,recovery rate is 78.32%. Rate of SiOz reduction was 60.36%. Contents of Al2O3 was reduced to meet with demand of blast furnace feed.