文档介绍：大杨庄选矿厂年处理量为40万吨原矿,给矿粒度为500~0mm,选厂设计为一次性平地建厂。
大杨庄铁矿属于中硬度矿石,含泥量小,采用三段一闭路破碎流程;主要有用矿物是磁铁矿,且粒度不均匀,,采用阶段磨矿,阶段磁选工艺。%。矿石经第一段磨矿分级溢流进入第一段磁选,%,%,%;粗选产品再经过地二段磁选,%,%,%;此时大量的尾矿被甩出,然后第二段磁选产品再进入第二段磨矿,之后对细粒磁铁矿进行选别;磨矿产品经过细筛选别,%,%,%;筛下产品经过第三段磁选,%,%,%;第三段磁选产品再经第四段磁选,%,回收率为85%,%,精矿经过滤机过滤,含水率小于10%。
关键词:选矿磁选精矿品位阶段选别
Abstract
The capacity of the Dayangzhuang dressing plant is 400,000t/a,the plant is going to be built on the ground which is filt and is put up at one time.
The Dayangzhuang iron ore is the medium degree of hardness and contains little slime, so we choose the three section of closed crushing circults; Consideration of the mainly valuable mineral is ite and the size of ite particles are not average ,we adopted stage grinding and ic separation technology. The grade of run-of-mine ore %. The overflow product of the first classifier is given into the first ic and the degree of the product of the first ic separator is %, product ratio is % and recovery of concentrate is %; Then the concentrate is given into the ic separator and the degree,the product ratio and the recovery of concentrate of its are %,%,% respectively;Now,large aquantity of gangue is separated,then product of the second ic separator is given into the second mill ,entering into the stage of separating fine ite product of mill is given into the fine screen and the product of fine screen′s degree, product ratio and recovery are %,%,% respectively;then the product of the fine screen is given into the third ic separator and the degree,the product ratio and the recovery of concentrate of the third ic separator are %,%,%
respectively;after that the product pass through the fourth ic separator and the concentrate′s degree, product ratio and recovery can to be 68%,85%,%
respecti