某难选弱磁性铁矿磁化焙烧-磁选试验研究  

Beneficiation of Refractory Weakly⁃Magnetic Iron Ore with Flowsheet of Magnetic Roasting and Magnetic Separation

作　　者：唐志波 廖舟 TANG Zhibo;LIAO Zhou(Hunan Shuikoushan Nonferrous Metals Group Co Ltd,Hengyang 421513,Hunan,China;Hunan Nonferrous Metals Holding Group Co Ltd,Changsha 410035,Hunan,China)

机构地区：[1]湖南水口山有色金属集团有限公司,湖南衡阳421513 [2]湖南有色金属控股集团有限公司,湖南长沙410035

出　　处：《矿冶工程》2023年第3期97-100,共4页Mining and Metallurgical Engineering

摘　　要：对江苏某难选弱磁性铁矿石进行了预还原磁化焙烧-磁选试验研究。结果表明,矿样在预还原反应温度750℃、反应时间60 min、还原剂煤用量3%、磨矿细度-0.074 mm粒级占75%条件下,经一粗一精一扫弱磁选,可获得铁品位65.05%、铁回收率96.19%的高品质铁精矿。研究结果可为难选弱磁性铁矿石选别提供一定参考。A flowsheet consisting of pre⁃reduction magnetic roasting and magnetic separation was introduced to process a refractory weakly⁃magnetic iron ore from Jiangsu Province.The results show that after 60 min roasting at 750℃by adding coal as a reducing agent at an amount of 3%,the pre⁃reduced iron ore was ground to a fineness of 75%-0.074 mm and then subjected to low intensity magnetic separation consisting of one roughing,one cleaning and one scavenging,resulting in a high quality iron concentrate grading 65.05%Fe at 96.19%recovery.The research results can provide technical reference for the mineral processing of refractory weakly⁃magnetic iron ore.

关 键 词：磁铁矿 预还原 磁化焙烧 磁选 铁精矿 

分 类 号：TD92[矿业工程—选矿]