CAJ | 학술논문

辽宁某开采深度为1400 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。
료녕모개채심도위1400 m적심부철광석철품위위37．03%，철주요이자성철급적갈철광적형식존재，분포솔분별위72．83%、22．52%，류、린등유해원소함량흔저。위개발이용해광석，대기진행료약자선—강자선—혼자정광반부선공예연구。결과표명：광양마세지-0．043 mm점75%후，경1단약자선—2단강자선，가득도철품위47．50%、회수솔95．01%적혼자정광；혼자정광재마지-0．038 mm점95%후，이정분위억제제、RS-3위포수제、경1조1정2소양리자반부선류정처리，가획득철품위67．21%、회수솔85．03%적정광산품。채용자선—반부선류정처리해심부철광석획득료교위이상적선별지표，대유사복잡난선심부철광석선광구유차감의의。
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.