白云鄂博霓石型低品位铁-稀土矿石矿选矿试验研究  

Experimental study on beneficiating of low grade iron rare earth ore of aegirine type in Bayan Obo

作　　者：王维维 候少春 李二斗 李强[1,2] 魏威[1,2] WANG Weiwei;HOU Shaochun;LI Erdou;LI Qiang;WEI Wei(Baotou Research Institute of Rare Earths,State Key Laboratory of Bayan Obo Rare Earth Resource Researches and Comprehensive Utilization,Baotou 014030,China;National Engineering Research Centre of Rare Earth Metallurgy and Functional Materials,Baotou 014030,China)

机构地区：[1]包头稀土研究院白云鄂博稀土资源研究与综合利用国家重点实验室,内蒙古包头014030 [2]稀土冶金及功能材料国家工程研究中心,内蒙古包头014030

出　　处：《中国矿业》2021年第9期132-138,共7页China Mining Magazine

基　　金：内蒙古自然基金项目资助(编号:2020MS05001);内蒙古自然基金重大专项资助(编号:2019ZD11)。

摘　　要：针对白云鄂博混合型铁-稀土矿石生产的铁精矿和稀土精矿回收率低、杂质含量高的问题,按照矿石类型进行分类选别。以霓石型低品位铁-稀土矿石为对象,在系统研究其矿石性质的基础上进行回收铁、稀土的选矿试验。研究结果表明,原矿中TFe品位为17.50%,稀土REO品位为8.43%,主要的铁矿物为磁铁矿,氟碳铈矿和独居石是主要的稀土矿物;脉石矿物主要是霓石、重晶石和方解石等;通过磨矿-两段弱磁选-再磨-弱磁选回收铁,在一段磨矿细度-0.074 mm 90%、粗选磁场强度和精选磁场强度分别为112 kA/m和96 kA/m、再磨细度和再磨磁场强度为-0.0454 mm 90%和96 kA/m的条件下获得TFe品位65.83%、TFe回收率69.86%的铁精矿;选铁尾矿在浮选温度60℃、水玻璃用量2.1 kg/t、捕收剂H 205用量1.0 kg/t的条件下经一次粗选、两次扫选的闭路试验可获得REO品位为50.89%,回收率为63.17%的稀土精矿。研究结果为白云鄂博矿的分类选矿提供技术借鉴。Aiming at the problems of low recovery rate and high impurity content of iron concentrates and rare earth concentrates produced in Bayan Obo mixed iron-rare earth ore,they are classified according to ore type.Taking neonite low-grade iron and rare earth ore as the object,the beneficiation test of iron and rare earth is carried out on the basis of systematically studying the properties of the ore.The results show that the TFe grade is 17.50%and the REO grade is 8.43%in the raw ore,the main iron minerals are magnetite,the main rare earth minerals are bastnaesite and monazite,and the gangue minerals are mainly neonite,barite and calcite,etc.Iron is recovered through grinding-two-stage weak magnetic separation and re-grinding-weak magnetic separation,the fineness of grinding in one section is-0.074 mm 90%,the magnetic field strength of coarse separation and the magnetic field strength of selective separation are 112 kA/m and 96 kA/m,respectively,regrind fineness and regrind magnetic field strength are-0.0454 mm 90%and 96 kA/m to obtain iron concentrate with TFe grade 65.83%and recovery 69.86%,and the impurity content reaches the smelting requirements;under the conditions of flotation temperature 60℃,water glass dosage 2.1 kg/t,collector H 205 dosage 1.0 kg/t,rare earth concentrate with a REO grade of 50.89%and recovery of 63.17%can achieve a through a closed circuit test with one rough selection and two sweep.The research results provide technical reference for the development and utilization of this type of ore.

关 键 词：白云鄂博 霓石型 铁 稀土 选矿 低品位 

分 类 号：TD912[矿业工程—选矿]