摘要:
以某微细粒赤褐铁矿样品为研究对象,针对赤褐铁矿嵌布粒度细、比表面大、磁选易团聚等特点,进行了不同选别工艺流程对比,最终采用粗细分选、强磁—螺旋溜槽与离心选矿机重选—中矿再磨再选工艺流程进行选别,获得了铁品位56.46%、硫含量1.47%、铁回收率77.24%的铁精矿。选别过程中利用离心力与重力的相互作用机理,将离心选矿机与强磁选机组合应用,充分发挥各单机优势,实现了微细粒赤褐铁矿有效分选,为微细粒赤褐铁矿综合利用提供了新的技术途径。
Abstract:
Aiming at characteristics of fine dissemination ,large specific surface ,easy agglomerate for magnetic separation,etc.of a micro-fine hem-limonite ore,separation index comparison of vari-ous mineral procession operation is conducted .Iron concentrate assaying 56.46%iron,1.47%sul-fur,with iron recovery of 77.24%is obtained through different process for coarse and fine particles , high intensity magnetic separation ( HIMS)—gravity separation using spiral chute¢rifugal con-centrator—regrinding and reconcentration for middlings .Take centrifugal force and gravity interac-tion mechanism in sorting process ,united centrifugal separator and magnetic separator ,make full use of each machine ,realizing efficient separation of microfine hem -limonite and providing new meth-ods for comprehensive utilization of this kind of ore .
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