陕西某钼矿石选矿新工艺研究

陕西某低品位钼矿石中主要含钼矿物为辉钼矿，辉钼矿呈微细粒嵌布在脉石矿物中。现场采用一段磨矿-1粗1精2扫、二段磨矿-9精2精扫、中矿顺序返回流程处理该矿石，仅能获得钼品位50%左右、钼回收率80%左右的钼精矿。为进一步改善分选指标，对该矿石进行了选矿新工艺研究。结果表明，采用一段磨矿-1粗1精2扫、二段磨矿-5精2精扫、三段磨矿-4次精选、中矿顺序返回流程处理该矿石，获得的钼精矿钼品位为54.23%、钼回收率为89.70%，精矿指标得到了显著提高。

A New Beneficiation Process for a Molybdenum Ore in Shaanxi

The main molybdenum mineral in a low-grade molybdenum ore in Shaanxi is molybdenite，and molybdenite was disseminated in gangues in micro-fine particle.Molybdenum concentrate with Mo grade of about 50% and Mo recovery of about 80% was obtained by adopting the process of one-stage grinding-one roughing，one cleaning，two scavenging，and two-stage grinding-nine cleanings and two scavenging-middles back to the flow-sheet in turn,on site. In order to further improve the separation indexes，the technical conditions tests on beneficiation of this ore were studied.The results showed molybdenum concentrate with Mo grade of 54.23% and Mo recovery of 89.70% was gained by the process of one-stage grinding-one roughing，one cleaning，two scavenging，and two-stage grinding-five cleanings，two scavenging of the concentrate，three-stage grinding-tree cleaning-middles back to the flow-sheet in turn.Thus，the final concentrate index has been significantly improved.