东秦岭某稀有金属矿石的工艺矿物学与主要矿物的回收工艺

发布时间：2018-08-08 16:38

【摘要】：对东秦岭某稀有金属矿的工艺特性进行了研究,确定了矿石的物质组成、结构构造、主要矿物的嵌布特征和粒度分布,对矿石中的有用矿物进行了选矿探索试验。结果表明:矿石中Nb_2O_5+Ta_2O_5含量为0.050%,伴生的Li、Be、Rb和Cs等元素可考虑综合回收;钽铌矿选矿采用磁选—重选联合流程回收(磁选富集铌铁矿和钽锰矿,重选富集钽铁矿、细晶石和烧绿石),最终获得Nb_2O_5和Ta_2O_5含量分别为20.728%和50.462%、回收率分别为28.82%和33.99%的铌钽精矿;锂矿物选矿采用浮选环境为中性的自主研发药剂,通过1粗1扫3精浮选流程处理,可获得Li_2O含量为1.65%、回收率为31.31%的锂精矿。鉴于长石以钠长石为主,且多含微细粒包裹体,大部分未解离,很难获得合格精矿,而锂尾矿Cs_2O和Rb_2O含量分别为0.20%和0.16%,经济价值较高,建议直接采用焙烧—水浸法工艺进行回收。
[Abstract]:The technological characteristics of a rare metal ore in East Qinling are studied. The material composition, structure, distribution and distribution of the main minerals are determined, and the ore dressing experiments are carried out for the useful minerals in the ore. The results show that the content of Nb_2O_5 Ta_2O_5 in the ore is 0.050, the associated elements such as Li-BeBeRb and Cs can be considered for comprehensive recovery, and the combined process of magnetic separation and gravity separation is used for the recovery of tantalum-niobium ore, which concentrates niobium ore and tantalum manganese ore by magnetic separation, and concentrates tantalite ore by gravity separation. The content of Nb_2O_5 and Ta_2O_5 were 20.728% and 50.462%, respectively, and the recoveries of niobium and tantalum concentrate were 28.82% and 33.99%, respectively. The Li_2O content is 1.65 and the recovery is 31.31%. In view of the fact that feldspar is dominated by albite and contains mostly microgranular inclusions, most of them are not dissociated, it is difficult to obtain qualified concentrate, while the Cs_2O and Rb_2O contents of lithium tailings are 0.20% and 0.16%, respectively. The economic value of feldspar is high. It is suggested that the roasting-water leaching process be directly used for recovery.
【作者单位】：中国地质科学院郑州矿产综合利用研究所;国家非金属矿资源综合利用工程技术研究中心;国土资源部多金属矿评价与综合利用重点实验室;
【基金】：中国地质调查局地质调查项目(编号:DD20160073,12120113061200)
【分类号】：TD91;TD954

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