某极低品位含铷矿石选矿试验研究

某含铷矿石中Rb_(2)O的含量为0.046%,铷元素没有独立的矿物存在,以类质同像赋存于含钾矿物(钾长石和黑云母)中,且铷的载体矿物与脉石矿物石英紧密共生,属于极低品位难选含铷矿石。为确定该含铷矿石的选矿工艺,较好地实现资源综合利用,对其进行磨矿细度试验、捕收剂条件试验、精选条件试验和浮铷尾矿综合回收试验的研究。结果表明,确定使用组合捕收剂椰油胺+SDS和抑制剂水玻璃的药剂制度下,固定磨矿细度为-0.074 mm占65%,采用“一粗两精两扫”浮选回收黑云母和部分钾长石中的铷,浮铷尾矿经磁选—浮选回收长石的工艺。全流程闭路试验可获得Rb_(2)O品位0.114%、Rb_(2)O回收率57.23%的铷精矿和Na_(2)O品位4.21%、Na_(2)O回收率48.66%,K_(2)O品位3.96%、K_(2)O回收率31.92%,白度为69%的长石精矿,有效地回收铷资源和长石产品,为该含铷矿石工业开发提供技术支撑。

Experimental study on Beneficiation of a very low-grade rubidium-bearing ore

The content of Rb2O in a rubidium-bearing ore is 0.046%. The rubidium element has no independent minerals, and is exists in potassium containing minerals (potassium feldspar and biotite) as isomorphisms, and the carrier mineral of rubidium is closely symbiotic with gangue mineral quartz, which is a very low-grade refractory ore. In order to determine the beneficiation process of the rubidium-bearing ore and better realize the comprehensive utilization of resources, the grinding fineness test, the collector condition test, the selected condition test and the comprehensive recovery Rb floating tailings test were studied. The results show that the reagent system for the combined collector cocoamine + SDS and inhibitor water glass is determined, when the grinding fineness is -0.074mm accounting for 65%, the flotation of "one coarse, two fine and two sweeps" is used to recover biotite and part of potassium feldspar, and Rb flotation tailings to recover feldspar concentrate through magnetic separation-flotation. The closed circuit test can obtain rubidium concentrate (Rb2O grade 0.114%, recovery rate 57.23%) and feldspar concentrate (Na2O grade 4.21%, recovery rate 48.66%; K2O grade 3.96%, recovery rate 31.92%; whiteness 69% ), effectively recover rubidium resources and feldspar products, and provide technical support for the industrial development of rubidium-bearing ore.