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为了确定重液旋流器预先富集矿石的能力,对影响固体在旋流器中的行为的一些参数进行了研究。为了评价试验结果,将旋流器产品在不同此重条件下进行浮沉分析,浮沉结果以TromP型分配曲线来检验。在这种分析中使用了SG50(即该比重矿粒,共50％进入溢流,另外的50％进入沉砂)的概念,而不采用在分级中常用的d50(粒度)。用于试样进行的试验室闭路旋流器试验结果证明,下列公式是有效的: 试验结果表明,从含0.4％Sn的矿样中可以丢弃占给矿83％含0.1％Sn的尾矿,并得到晶位为1.7％Sn的精矿,回收率在80％以上。在现厂给矿可能为被水浸湿的矿粒,为了查明给矿中水分的影响,进行了单独的试验,共结果指出,进入的水分分为两部分:一部分是游离水,排入旋流器的溢流中,另一部分以水膜附着在矿粒上,使矿粒的大小及比重有所变化。水膜的存在使重液易于回收,但降低了富集效果。提高给矿压力或应用表面活性剂可以最大限度地降低水在旋流器中的不良影响。以增加剪切力的高给矿压力能降低矿粒上水膜的厚度。吸附到矿粒上从而形成琉水表面的表面活性剂,能置换水膜并使重液润湿改变后的表面。在达两种情况下,给矿所带入的水都能以游离水从旋流器溢流中排出。这样,水对富集效果的不良影响就能减少。尚需进行补充试验,以研究水在系统中的行为,从而确定预先富集最合适的粒度、最佳的单体分离粒度、现有选矿厂的产品进一步处理问题以及测定从产品中回收重液的效果等。
In order to determine the ability of a heavy hydrocyclone to pre-concentrate ore, some parameters affecting the behavior of solids in the cyclone were studied. In order to evaluate the test results, the cyclone product was subjected to the floatation analysis under different heavy conditions. The result of the floatation test was verified by TromP type distribution curve. Instead of using the d50 (particle size) commonly used in fractionation, the SG50 (ie, the specific gravity mineral particles, 50% total flooding, 50% additional grit entry) was used in this analysis. The laboratory closed-loop hydrocyclone test results for the samples demonstrate that the following formula is valid: The results show that 83% of the tailings containing 0.1% Sn are accounted for from the 0.4% Sn- And get the crystal site of 1.7% Sn concentrate, the recovery rate of more than 80%. In the factory, the mine may be wetted by water. In order to find out the influence of the water in the mine, a separate experiment was carried out. The results showed that the incoming water was divided into two parts: one was free water and the other was discharged Swirler overflow, the other part of the water film attached to the mineral particles, so that the size and proportion of mineral particles vary. The presence of a water film makes heavy fluids easy to recycle but reduces the enrichment effect. Increasing ore pressure or applying surfactants minimizes the adverse effects of water in the cyclone. The high feed pressure to increase the shear force can reduce the thickness of the water film on the mineral particles. Surfactants adsorbed to the mineral particles to form the Ryukyu surface displace the water film and allow the heavy liquid to wet the altered surface. In either case, the water supplied to the mine can be discharged from the cyclone overflow with free water. In this way, the adverse effects of water on enrichment can be reduced. Additional tests are required to study the behavior of water in the system to determine the most appropriate particle size for pre-enrichment, the best monomer separation particle size, further processing issues with existing concentrator products, and the determination of recovery of heavy fluid from the product The effect and so on.