青海某低品位难选铁矿选矿试验研究  

Experimental study on beneficiation of a low-grade refractory iron ore in Qinghai province

作　　者：罗云波 肖金雄[4] 石云良[4] 谢宝华 Luo Yunbo;Xiao Jinxiong;Shi Yunliang;Xie Baohua(Guangzhou Yueyouyan Mineral Resources Technology Co.,Ltd.,Guangzhou 510651,Guangdong,China;State Key Laboratory of Separation and Comprehensive Utilization of Rare Metal,Guangzhou 510651,Guangdong,China;Institute of Resource Utilization and Rare Earth Development,Guangdong Academy of Sciences,Guangzhou 510651,Guangdong,China;Changsha Research Institute of Mining and Metallurgy Co.,Ltd,Changsha 410012,Hunan,China)

机构地区：[1]广州粤有研矿物资源科技有限公司,广东广州510651 [2]稀有金属分离与综合利用国家重点试验室,广东广州510651 [3]广东省科学院资源利用与稀土开发研究所,广东广州510651 [4]长沙矿冶研究院有限责任公司,湖南长沙410012

出　　处：《钢铁钒钛》2023年第5期28-35,共8页Iron Steel Vanadium Titanium

摘　　要：针对青海某难选铁矿石铁品位较低,磁铁矿嵌布粒度细,与脉石矿物关系复杂的特点,采用干抛—阶段磨矿—阶段磁选的工艺流程进行试验研究,该工艺流程的主要特点是在干抛和一段磨矿作业时可以抛掉大量的尾矿,大幅度降低后续磨矿作业的入磨量。结果表明,经过四段磨矿,在最终磨矿细度-0.025 mm占95.15%时,可以获得含TFe 64.10%,TFe回收率为70.45%的铁精矿,较好地实现了该低品位难选铁矿的回收。同时,分析了四段铁精矿中的磁铁矿仍有少部分呈铁的贫连生体产出,其组成是影响铁精矿品位难以进一步提高的主要原因。Aiming at the characteristics of low iron grade,fine distribution size of magnetite and complex relationship with gangue minerals of a refractory iron ore in Qinghai province,the technological process of dry throw-stage grinding and stage magnetic separation was adopted for experimental study.The main feature of this technological process is that a large amount of tailings can be discarded during dry throwstage grinding and the subsequent grinding operation can greatly reduce the grinding amount.The results show that after four stages of grinding,iron concentrate containing TFe grade of 64.10%and TFe recovery rate of 70.45%can be obtained when the final grinding fineness of−0.025 mm is 95.15%.The recovery of the low-grade refractory iron ore is better realized.At the same time,it is analyzed that a small part of magnetite in the iron concentrate of the fourth section is mainly produced as iron-poor auxiliaries,and its composition is the main reason that it is difficult to further improve the grade of iron concentrate.

关 键 词：低品位铁矿石 嵌布粒度 干抛 阶段磨矿—阶段磁选 反浮选 

分 类 号：TD951[矿业工程—选矿]