酒钢粉矿回转窑磁化焙烧-磁选试验研究  

The Experiment Study on the Powder Ore Magnetization Roasting–Magnetic Separation in JISCO

作　　者：寇明月[1] 边立国 Kou Mingyue;Bian Liguo(lmn and Steel Research Institute of Hongxiug lron ＆ Steel Co. Ltd.;Sintering Plant of Hougxing Iron ＆ Steel Co. Ltd., Jiuquan lron and Steel （Group） Corporation, Jiayuguan, Gansu, 735100)

机构地区：[1]酒钢集团宏兴股份公司钢铁研究院 [2]酒钢集团宏兴股份公司选烧厂,甘肃嘉峪关735100

出　　处：《酒钢科技》2018年第1期6-12,共7页

摘　　要：酒钢0-15mm的镜铁山粉矿采用磨矿-强磁选工艺处理,仅能获得铁矿石品位47.5%左右、铁回收率为60%左右的铁精矿,为了提高粉矿分选指标,对全粒级粉矿以小型电热回转窑进行了磁化焙烧-磁选试验研究探索。结果表明,全粒级粉矿采用分级分阶段入窑方式,煤粉与焙烧粉矿质量2.8%,煤粒5~10mm,焙烧温度820℃,总焙烧时间30min,磨矿细度-300目92%,磁选场强0.25T条件下,可获得铁品位59.47%,铁回收率87%以上的铁精矿。Using the grinding magnetic separation process to process the 0 -15 mm powder ore of JISCO Jingtieshan mine, the iron ore grade and the iron recovery of the iron concentrate are only about 47.5% and 60% respectively. In order to improve the powder ore separation index,the magnetization roasting-magnetic separation test on powder ore of the whole grain grade are carried out to explore new process. The results show that in the condition of 2.8% pulverized coal and calcined powder ore, 5 -10 mm coal grain, 820℃ roasting temperature, 30 min roasting time,92%-300 mesh grinding fineness and 2500 Oe magnetic field strength, the iron concentrate of above 59.47% iron grade and above 87% iron recovery can be obtained.

关 键 词：粉矿 全粒级 分级分阶段 磁化焙烧 磁选 

分 类 号：TD951.1[矿业工程—选矿]