云南某中低品位白钨矿常温浮选技术研究

【作者】 杨晓峰；

【导师】 刘全军；

【作者基本信息】 昆明理工大学 ， 矿物加工工程， 2008， 硕士

【摘要】 我们针对云南某地区的钨矿资源进行了选矿新技术研究,其目的是充分利用矿产资源,利用选矿新技术、新药剂、新工艺,对该地区的钨矿资源进行可选性评价。本次试验所选用的原矿品位在0.38%,属于中低品位氧化矿,委托方要求选矿后精矿品位大于60%,回收率大于80%。由于白钨矿与方解石、萤石等含钙脉石矿物的可浮性十分相近,因此它们的浮选分离十分困难。前苏联和国内大部分选矿厂对白钨矿多采用加温浮选,即彼得罗夫法,但此方法操作复杂,能耗大,成本高,生产环境差,因而白钨矿与含钙脉石矿物在常温条件下浮选分离一直是选矿界探索的话题,为此,我们在本次试验中的目标就是在常温下实现白钨矿与脉石的分离。我们在试验过程中对该矿石进行了三种选别流程方案的比较,即(1)单一重选(摇床)方法；(2)浮选法；(3)重—浮联合流程。经过试验对比,在磨矿细度为-200目占62.58%时,单一重选法可得出钨精矿含三氧化钨34.67%,但钨的回收率只有25.97%；此方案不可取。重—浮联合流程,可分别得出重选钨精矿和浮选钨精矿,其品位较好,两种钨精矿中钨的总回收率也较高,但流程较复杂,生产过程中控制较难。全浮选法,浮选流程结构简单,操作方便,选别指标也好,采用了6次精选,两次扫选就可以使钨精矿品位达到63.17%,钨金属回收率为86.32%。在对比了白钨矿重选、重浮联合、全浮选三种流程后,最后采用全浮选作为此次白钨矿分选的最终流程,并在多次试验的基础上,运用新药剂、新方法,创新的实现了白钨矿的常温浮选。在确定了药剂制度和工业流程后,我们从节能、减排、可持续发展的角度上考虑,对浮选尾矿进行了回水试验,并证明了选矿废水可以重新返回利用,不但减少了对选厂周围水质的污染,又减少了选矿成本。更多还原

【Abstract】 We directed against the resources of wolfram ore in the area of YUN NAN province, the purpose is adequate use the mineral resources, use the new technology and reagent to research if this area of wolfram ore has the value to be opened up and develop.In this experiment, the grade of the ore is only 0.38%, which is belonging to the ore of lower-grade. The company requests us the grade of the finished ore must higher than 60%, the recover must higher than 80%.Because of the scheelite’s floatability is similar with the calcite and kelve, the scheelite is different to be celebrated. Russia and most of the concentrator in our country is used the hot flotation, but this way is complex to operate, the consumption of energy is very big, also has the high capital and the environment of the concentrator is very disappointing. So how to celebrate the scheelite and gangue mineral with calcium in the normal temperature is a target of the experts. In our experiment, our purpose is try to realize this target.In this experiment, we have taken three ways for celebrating the scheelite, so as:(1) only in gravimetric separation (2) flotation (3) combined work with gravity and flotation.Through with comparison, when the mesh-of-grind at 62.58%(below the 0.074millimeter), only work as gravity, the finished ore’s grade is 34.67%, the recover is only 25.97%. So this way has given up. Combined work with gravity and flotation, we can received the finished ore as gravity and flotation, the grade and the recover are qualified, but the circuit is very complex, it is not easy to be controlled. Floatation, the circuit is simply, and easy to control, the most important is the indicator is very well, after six times concentration, we can receive the finished ore’s grade at 63.17%, the recover at 86.32%.After the comparison with gravity、flotation and the combined work, we use the way with flotation at last. Based on many experiments, we have realized the way to celebrate the scheelite under the normal temperature with the new reagent and method.The reagent and circuit have been finalized, we considered reducing the waste, so we have taken many experiments on the waste water, and have proved that the waste water can be used again. In this way, we not only reduce the pollution near the concentrator, but also reduce the capital.更多还原