摘要
混合型磁赤铁矿通常采用弱磁—强磁阶段磁选工艺进行分选。根据鞍山地区混合型磁赤铁矿的磁性特征,采用复合型磁系设计方法和半闭合式磁系结构,结合重力、离心力和流体曳力等复合力场的综合应用,研制了三产品磁选机,分选筒体内4种磁极的表面平均磁场强度由低到高分别为200.4、449.9、529.5、643.2 k A/m,能够同步实现磁铁矿的弱磁选和赤铁矿的强磁选。对某TFe品位为32.89%的混合型磁赤铁矿进行分选试验,在磨矿细度为-0.074 mm占44.15%的条件下,调整筒体转速、筒体倾角、分散水压分别为0.4 m/s、5°和0.2 MPa,可获得精矿、中矿、尾矿TFe品位分别为44.63%、26.60%、10.17%,TFe回收率分别为72.14%、20.98%、6.88%的指标。研究结果能够为混合型铁矿石的短流程同步磁选提供新的技术途径。
The mixed maghemite is usually separated by the magnetic separation process of"low intensity magnetic and high intensity magnetic"stage.According to the magnetic characteristics of mixed magnetite in Anshan area,a three-product magnetic separator is developed by using the design method of compound magnetic system and the structure of semi-closed magnetic system,combined with the comprehensive application of gravity,centrifugal force and fluid drag force.The average surface magnetic field intensity of the four magnetic poles in the sorting cylinder is 200.4、449.9、529.5、643.2 k A/m from low to high,which can realize the low intensity magnetic separation of magnetite and high intensity magnetic separation of hematite simultaneously.The sorting test of a mixed maghemite was carried out.Under the condition that the content of-0.074 mm was 44.15%and the grade of TFe was 32.89%,the speed of the cylinder,the Angle of the cylinder and the dispersed water pressure were adjusted to 0.4 m/s,5°and 0.2 MPa,respectively.The TFe grade of concentrate,middle and tailings is 44.63%,26.60%and 10.17%,and the TFe recovery is 72.14%,20.98%and 6.88%,respectively.This study can provide a new technical approach for short process synchronous magnetic separation of mixed iron ore.
作者
李梓豪
吴俊杰
郭小飞
岳翔
马阳
代淑娟
LI Zihao;WU Junjie;GUO Xiaofei;YUE Xiang;MA Yang;DAI Shujuan(School of Mining Engineering,University of Science and Technology Liaoning,Anshan 114051,China)
出处
《金属矿山》
CAS
北大核心
2022年第12期184-188,共5页
Metal Mine
基金
辽宁省教育厅服务地方项目(编号:2020FWDF12)
辽宁省“兴辽英才计划”项目(编号:XLYC20020208)。
关键词
混合型磁赤铁矿
三产品磁选机
复合型磁系
复合力场
同步磁选
mixed type maghemite
three products magnetic separator
complex magnetic system
compound force field
synchronous magnetic separation
