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内蒙古某低品位铷多金属矿选矿试验研究

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内蒙古某铷多金属矿主要有价元素是铷和钽铌,Rb2O品位为0.11%、(Ta,Nb)O5含量为222.9 g/t,铷主要以类质同像形式存在于云母和钾长石中,少量赋存于钠长石中,钽铌矿物主要是烧绿石.为回收铷和钽铌资源,在原矿工艺矿物学研究的基础上开展了选矿试验研究,采用"强磁选+重选回收钽铌-中性浮选含铷云母-无氟有酸浮选含铷长石"的工艺流程,硫酸调节矿浆pH值,CK-Y1+DDA组合捕收浮选云母,SDS+DDA组合捕收浮选长石,全流程闭路试验获得产率为 0.17%、(Ta,Nb)O5 品位为 4.33%、(Ta,Nb)O5回收率为33.22%的钽铌精矿和产率为70.26%、Rb2O品位为0.134%、Rb2O回收率为87.49%的综合铷精矿产品,尾矿中Rb2O品位为0.045%,实现了矿石中铷资源的充分回收和伴生钽铌资源的有效回收.
Experimental Study on Beneficiation of a Low-Grade Rubidium Polymetallic Ore in Inner Mongolia
The main valuable elements of a rubidium polymetallic ore in Inner Mongolia are rubidium,tantalum and niobium.The Rb2O grade is 0.11%and the content of(Ta,Nb)O5 is 222.9 g/t.Rubidium mainly exists in mica and potassium feldspar in the form of isomorphism,and a small amount exists in albite.Tantalum-niobium minerals are mainly pyrochlore.In order to recover rubidium,tantalum and niobium resources,beneficiation experiments were carried out on the basis of process mineralogy of raw ore.The process flow combining high-intensity magnetic separation with gravity separation recovery of tantalum,niobium-neutral flotation of rubidium-containing mica-fluorine,and free acid flotation of rubidium-containing feldspar was adopted.The pH value of the pulp was adjusted by sulfuric acid.The CK-Y1+DDA combination was used to collect the flotation mica,and the SDS+DDA combination was used to collect the flotation feldspar.Tantalum-niobium concentrate with yield of 0.17%,(Ta,Nb)Os grade of 4.33%and(Ta,Nb)Os recovery of 33.22%,as well as comprehensive rubidium concentrate with yield of 70.26%,Rb2O grade of 0.134%and Rb2O recovery of 87.49%were obtained in the whole process closed-circuit test.The grade of Rb2 O in the tailings was 0.045%,which realized the full recovery of rubidium resources in the ore and the effective recovery of associated tantalum-niobium resources.

RubidiumTantalum-NiobiumMica-FeldsparMagnetic separationFlotation

李杰、孙大勇、祁忠旭、韩远燕、陈巧妹

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长沙矿山研究院有限责任公司,湖南长沙 410012

钽铌 云母-长石 磁选 浮选

2024

矿业研究与开发
长沙矿山研究院有限责任公司 中国有色金属学会

矿业研究与开发

CSTPCD北大核心
影响因子:0.763
ISSN:1005-2763
年,卷(期):2024.44(1)
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