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.
作者
郭风芳
韩跃新
张琦
高鹏
何佳昊
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)
出处
《金属矿山》
CAS
北大核心
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)。
关键词
铁矿石
氢基矿相转化
磁选
H_(2)与CO摩尔比
iron ore
Hydrogen-based Mineral Phase Transformation(HMPT)
magnetic separation
H_(2) and CO molar ratio
