海南石碌铁矿石氢基矿相转化——磁选试验研究  

Experimental Study on Hydrogen-based Mineral Phase Transformation Followed by Magnetic Separation of Iron Ore from Shilu,Hainan

作　　者：郭风芳[1] 韩跃新[2,3] 张琦 高鹏 何佳昊[2,3] GUO Fengfang;HAN Yuexin;ZHANG Qi;GAO Peng;HE Jiahao(Hainan Mining Co.,Ltd.,Changjiang 572799,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;National-local Joint Engineering Research Center of High-efficient Exploitation Technology for Refractory Iron Ore Resources,Shenyang 110819,China;Liaoning Dongda Mining&Metallurgy Engineering Technology Co.,Ltd.,Chaoyang 122000,China)

机构地区：[1]海南矿业股份有限公司,海南昌江572799 [2]东北大学资源与土木工程学院,辽宁沈阳110819 [3]难采选铁矿资源高效开发利用技术国家地方联合工程研究中心,辽宁沈阳110819 [4]辽宁东大矿冶工程技术有限公司,辽宁朝阳122000

出　　处：《金属矿山》2024年第2期152-156,共5页Metal Mine

基　　金：国家重点研发计划项目(编号:2021YFC2902400)。

摘　　要：海南石碌铁矿石铁品位为52.45%,铁主要以赤(褐)铁矿形式存在,分布率达86.18%,少量以磁铁矿形式存在。为高效回收利用该矿石,采用氢基矿相转化(HMPT)—磁选工艺流程开展了系统的试验研究,并对适宜条件下的产品进行了化学成分、XRD和VSM分析。结果表明:试样在给矿粒度-0.074mm占89.41%、HMPT温度525℃、HMPT时间10min、总气体流量500m L/min、H_(2)浓度20%、HMPT产品磨矿细度-0.045mm占69.68%的适宜条件下,经磁选获得铁品位65.26%、铁回收率95.39%的铁精矿。试验所获铁精矿较原重磁联合工艺铁精矿品位提高了2.7个百分点,铁回收率增加了30个百分点。研究不仅为海南石碌铁矿氢基矿相转化—高效分选工业应用提供技术支撑,还为其他复杂难选铁矿资源的绿色高效分选提供了参考依据。The iron content of the Shilu iron ore in Hainan province is 52.45%.Within this composition,a substantial 86.18%manifests as hematite/limonite,with a minor presence of magnetite.To efficiently recover this ore,a systematic experi-mental study on Hydrogen-based Mineral Phase Transformation(HMPT)-magnetic separation process was carried out,and the products under the optimal conditions were analyzed by chemical composition,XRD and VSM.The results indicate that,under the optimal conditions of a feed particle size of-0.074 mm accounting for 89.41%,HMPT temperature of 525℃,HMPT time of 10 min,total gas flow rate of 500 mL/min,H_(2) concentration of 20%,and HMPT product grinding fineness of-0.045 mm ac-counting for 69.68%,the iron concentrate with an iron grade of 65.26%and an iron recovery rate of 95.39%was obtained by magnetic separation.The iron concentrate obtained from the experiments exhibited an increase of 2.7 percentage points in iron grade and a commendable 30 percentage point rise in iron recovery rate compared to the original gravity and magnetic separa-tion combined process.The study not only provides technical support for the industrial application of HMPT-efficient sorting in Hainan Shilu iron ore,but also opens up new avenues for the green and efficient sorting of other complex and refractory iron ore resources.

关 键 词：铁矿石 氢基矿相转化 磁选 H_(2)与CO摩尔比 

分 类 号：TD925[矿业工程—选矿]