含铀硼铁矿选铁尾矿中铀硼资源回收试验研究  

Study on Recovery Tests of Uranium and Boron Resources from Iron Tailings of Uranium-bearing Paigeite Ore

作　　者：刘飞飞 李丽匣[1] 靳跃栋 薛向欣 程功金 LIU Feifei;LI Lixia;JIN Yuedong;XUE Xiangxin;CHENG Gongjin(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;Liaoning Shougang Iron Boron Co.,Ltd.,Fengcheng 118103,China;School of Metallurgy,Northeastern University,Shenyang 110819,China;Liaoning Provincial Key Laboratory of Metallurgical Resource Circulation Science,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]辽宁首钢硼铁有限责任公司,辽宁凤城118103 [3]东北大学冶金学院,辽宁沈阳110819 [4]辽宁省冶金资源循环科学重点实验室,辽宁沈阳110819

出　　处：《金属矿山》2023年第7期204-212,共9页Metal Mine

基　　金：“十三五”国家重点研发计划项目(编号:2019YFC1907702)。

摘　　要：辽宁翁泉沟地区含铀硼铁矿中铀、硼资源丰富,主要以晶质铀矿和硼镁石的形式存在,某选矿厂含铀硼铁矿选铁尾矿中U、B2O3品位分别为0.0133%、14.05%。为了提高该选铁尾矿中铀、硼资源的利用率,进行了矿物特征自动定量分析系统(AMICS)测试、化学分析、铀硼元素的平衡计算和粒度分析,探明了尾矿中的矿物存在形式、粒度分布、解离特性、元素分布等特征,根据试样性质,制定了“微细粒铀、硼矿物强化物理场预富集—摇床精选—重选尾矿浮选”的重—浮联合工艺分选流程。试验结果表明:通过优化离心分选、摇床分选、浮选的操作,获得了铀精矿中U品位0.1518%,U作业回收率60.16%,硼精矿中B_(2)O_(3)品位14.76%,B_(2)O_(3)作业回收率94.84%的分选指标;铀矿物主要分布在-74μm细粒级中,U分布率为77.13%,硼矿物主要分布在-38μm细粒级中,B2O3分布率为84.67%;和原工艺指标相比,选铁尾矿中U、B_(2)O_(3)回收率都得到提高,可为企业增加效益。该含铀硼铁矿选铁尾矿重—浮联合工艺可以有效回收微细粒铀、硼矿物,对其他微细粒矿物的回收具有借鉴意义。Uranium and boron are abundant in uranium-bearing paigeite ore in Wengquangou area,Liaoning Province,which mainly exist in the form of uraninite and ascharite.The grades of U and B2O3 in the tailings of uranium-bearing paigeite ore in a concentrator are 0.0133%and 14.05%.In order to improve the utilization rate of uranium and boron resources in the tailings of iron separation,through the automatic mineral identification and characterization system(AMICS)test,chemical analysis,balance calculation of uranium and boron elements and particle size analysis,the characteristics of mineral existence,particle size distribution,dissociation characteristics and element distribution in the tailings were carried out.According to the tailings properties,the separation process of"gravity-flotation combination"of"enhanced physical field preconcentration of fine uranium and boron minerals,shaking table separation,gravity tailings flotation"was formulated.The test results indicate that:by optimizing centrifugal separation,shaking table separation and flotation,the separation indexes of U grade of 0.1518%and U operation recovery rate of 60.16%in uranium concentrate and B_(2)O_(3)grade of 14.76%and B_(2)O_(3)operation recovery rate of 94.84%in boron concentrate were obtained.Uranium minerals are mainly distributed in-74μm fine grains with a U distribution rate of 77.13%,while boron minerals are mainly distributed in-38μm fine grains with a B_(2)O_(3)distribution rate of 84.67%.Compared with the original process index,the recovery rates of U and B_(2)O_(3)in iron tailings are improved,which can increase the benefit of enterprises.The"gravity-flotation combined process"of uranium-bearing paigeite ore iron separation tailings can effectively recover fine uranium and boron minerals,which has reference significance for the recovery of other fine minerals.

关 键 词：含铀硼铁矿 尼尔森离心选矿 浮选 重—浮联合工艺 资源回收 

分 类 号：TD926.4[矿业工程—选矿]