摘要
贵州某贫赤铁矿石属典型的高硅铝、低硫磷赤铁矿石,铁矿物嵌布粒度微细,常规选矿工艺难以获得合格铁精矿。为开发利用该大型贫赤铁矿石资源,对该矿石进行了选择性絮凝沉降脱泥—反浮选提铁降杂试验研究。结果表明,在磨矿细度为-0.045 mm占88%的情况下,经2次絮凝沉降脱泥,1粗1精1扫、中矿顺序返回闭路反浮选流程处理,可获得铁品位为61.20%,SiO2和Al2O3含量分别为6.30%和2.58%,铁回收率为66.48%的铁精矿,该流程与常规还原焙烧—弱磁选流程比较,具有显著的流程简单、能耗和生产成本低的特点。
The low grade hematite ore from Guizhou is a typical high A1-Si and low S-P hematite. It is difficult to obtain qualified iron concentrate by conventional beneficiation methods due to fine disseminated iron minerals in the ore. Beneflciation experiment of selective flocculation-reverse flotation was carried out on the ore with the purpose of better developing and utili- zing the resources. The results showed that with the grinding fineness of 0. 045 mm 88% passing, iron concentrate with Fe grade of 61.20% ,SiO2 content of 6. 30 %, A1203 content of 2. 58 %, and iron recovery of 66.48 % was obtained with the closed-circuit reverse flotation process of one roughing-one cleaning-one scavenging-middles back to the flow-sheet in turn after secondary flocculating sedimentation. Compared with the conventional flow-sheet of reduction roasting-magnetic separation, this process has the significant advantages as simple flow, low energy consumption and low production costs.
出处
《金属矿山》
CAS
北大核心
2014年第1期60-64,共5页
Metal Mine
基金
贵州科学院基金项目(编号:黔科院J合字[2011]21号)
关键词
高铝硅赤铁矿
选择性絮凝
反浮选
High aluminum and silicon hematite ore, Selective flocculation, Reverse flotation
