褐铁矿型红土镍矿磁化焙烧—弱磁选试验研究  

Study on Magnetic Roasting-Weak Magnetic Separation of Limonitic Laterite Ore

作　　者：于文圣 YU Wen-Sheng(Shenyang Research Institute of Nonferrous Metals Company Limited,Shenyang 110141,China)

机构地区：[1]沈阳有色金属研究院有限公司,辽宁沈阳110141

出　　处：《有色矿冶》2018年第3期35-39,共5页Non-Ferrous Mining and Metallurgy

摘　　要：本研究以生物质锯末为还原剂,采用磁化焙烧—弱磁选工艺对褐铁矿型红土镍矿生产铁精矿进行试验研究,确定了还原焙烧—弱磁选工艺的最佳工艺条件。研究结果表明:在粒径-0.074mm的红土镍矿质量分数占85%~90%、锯末用量为红土镍矿质量分数的17.5%、焙烧温度850℃、焙烧时间20min、冷却方式为水冷、弱磁选磁场强度为1 400Gs条件下,镍、铁回收率分别为83.14%和54.8%,精矿中Ni、Fe品位分别达到1.486%和60.75%,达到了钢铁对铁精矿成分的要求。Biomass sawdust was used as reductant to product iron concentrate from limonitic laterite by using magnetization roasting-weak magnetic separation technolog,and the optimum technological conditions were determined.The results show that the optimal conditions were ore size of-0.074 mm of 85%-90%,dosage of sawdust as laterite nickel ore mass fraction of 17.5%,roasting temperature of 750℃,roasting time of 20 min,cooling mode for water,weak magnetic field strength of 1400 Gs.The recovery rate of nickel and iron was 83.14% and 54.8%,respectively.The grade of Ni and Fe in the concentrate reached 1.486% and 60.75%,respectively,which reached the requirement of iron concentrate.

关 键 词：褐铁矿型红土镍矿 生物质锯末 磁化焙烧 弱磁选 铁精矿 

分 类 号：TD924.1[矿业工程—选矿]