摘要
辽宁某开采深度为1 400 m的深部铁矿石铁品位为37.03%,铁主要以磁性铁及赤褐铁矿的形式存在,分布率分别为72.83%、22.52%,硫、磷等有害元素含量很低。为开发利用该矿石,对其进行了弱磁选—强磁选—混磁精矿反浮选工艺研究。结果表明:矿样磨细至-0.043 mm占75%后,经1段弱磁选—2段强磁选,可得到铁品位47.50%、回收率95.01%的混磁精矿;混磁精矿再磨至-0.038 mm占95%后,以淀粉为抑制剂、RS-3为捕收剂、经1粗1精2扫阳离子反浮选流程处理,可获得铁品位67.21%、回收率85.03%的精矿产品。采用磁选—反浮选流程处理该深部铁矿石获得了较为理想的选别指标,对类似复杂难选深部铁矿石选矿具有借鉴意义。
There is 37. 03% Fe in a deep iron ore with depth of 1 400 m in Liaoning. Iron mainly exists in form of mag-netite and hematite-limonite,with distribution rate of 72. 83% and 22. 52% respectively. The content of harmful elements such as sulfur,phosphorus is very low. Beneficiation experiments of low intensity magnetic separation（ LIMS）-high intensity magnet-ic separation（ HIMS）-reverse flotation on mixed magnetic iron concentrate were applied for exploitation and utilization of the ore. The results indicated that,at the grinding fineness of 75% passing 0. 043 mm,via once LIMS and twice HIMS,mixed mag-netic concentrate with iron grade of 47. 05% and recovery of 95. 01% is obtained. Iron concentrate with iron grade of 67. 21%and recovery of 85. 03% is obtained after ground the mixed magnetic concentrate to 95% passing 0. 038 mm and then endure one roughing-one cleaning-two scavenging flotation process,using starch as depressor and RS-3 as collector. By magnetic and reverse flotation separation technology to deal with the deep iron ore can achieve relative ideal separation indexes,and can pro-vide significant reference for the separation of similar refractory deep iron ore.
出处
《金属矿山》
CAS
北大核心
2015年第6期70-73,共4页
Metal Mine
基金
国家自然科学基金青年基金项目(编号:51204035)
中国地质调查项目(编号:12120113086600)
关键词
深部铁矿石
阶段磨选
混磁精矿
反浮选
Deep iron ore
Stage grinding stage separation
Mixed magnetic concentrate
Reverse flotation
