青海某铅锌矿预选抛废工业试验研究

Industrial Experiment Study on Pre-selection and Waste Ore Discarding of one Qinghai Lead-zinc Mine

青海某铅锌矿原矿品位较低,使得破碎、磨矿以及浮选等工序能耗和材耗上升,生产成本增加,导致经济效益变差。通过对矿石进行预选抛废小型试验,原矿品位含铅0.6%、含锌2.83%,经过预抛铅可提升至1.0%,含锌可提升至4.24%,入选原矿品位有明显提升。在小试基础上,从给矿品位、单机台效、抛废率及尾矿品位等关键指标开展工业试验,试验结果显示,给矿品位与单机台效、抛废率成反比关系,与尾矿品位成正比关系,原矿品位越低,抛废效果越好,反之则越差。

The ore grade of raw ore from one Qinghai lead-zinc mine is low,it is the reason for rising energy consumption and material consumption of working procedures of ore crushing and grinding,as well as increasing of production cost,and decreasing of economic benefit.The results of small test of ore pre-selection and waste ore discarding technology show,the lead grade of raw ore is 0.6%,the zinc grade is 2.83%,the lead grade can be increased to 1.0%,the zinc grade can be increased to 4.24%after pre-selection and waste ore discarding,the selected raw ore grade is increased greatly.On the basis of small test,the industrial tests about ore grade,productiveness of single machine,waste ore discarding rate and tailings grade and the other critical indicators were carried out,test results show,ore grade is inversely related to single machine,dump rate,and it is in direct proportion to tailings grade,the lower the raw ore grade,the better the waste ore discarding results,and vice versa.