某选矿厂细粒级矿泥分级过滤试验研究

Experimental Study on Grading Filtration of Fine-grained Mineral Slurry in a Concentrator

某选矿厂为了分选出细粒级矿泥中的粗粒物料并过滤,对该细粒级矿泥(一段旋流器溢流)的性质进行了分析,并在此基础上对其进行了旋流器分级及陶瓷过滤机过滤试验。试验结果表明:该矿泥粒度较细,-20μm粒级含量高达66.86%,且铅、锌氧化率较高;采用旋流器分级后,旋流器沉砂中-20μm粒级含量可降低至19.75%,且铅、锌氧化率均降低至10.0%以下;过滤试验表明,采用陶瓷过滤机可有效过滤旋流器沉砂中的水分,滤饼含水率为12.23%且滤液清澈。

In order to separate the coarse-grained materials in the fine-grained slime and filter in a concentrator,the properties of the fine-grained slime(one-stage cyclone overflow)are analyzed.On this basis,the cyclone classification and ceramic filter filtration test are carried out.The results show that the particle size of the slime is fine,the content of-20μm particle size is as high as 66.86%,and the oxidation rate of lead and zinc is high.After cyclone classification,the content of-20μm fraction in cyclone grit can be reduced to 19.75%,and the oxidation rate of lead and zinc can be reduced to less than 10.0%.The filtration test shows that the ceramic filter can effectively filter the water in the settling sand of the cyclone.The water content of the filter cake is 12.23%and the filtrate is clear.