金山店铁矿高压辊磨-预选试验研究  

Experimental Study on High Pressure Roller Mill-Pre-selection in Jinshandian Iron Mine

作　　者：王中才 WANG Zhongcai(Wuhan Iron and Steel Group Mining Co.,Ltd.)

机构地区：[1]武钢资源集团有限公司,湖北省武汉市430080

出　　处：《现代矿业》2022年第9期111-114,共4页Modern Mining

摘　　要：为进一步提高矿山的综合效益,针对武钢金山店铁矿入磨矿品位低、入磨粒度大等问题,采用高压辊磨工艺对原料进行了预选处理试验研究。研究了高压辊磨开路流程压力、转速和物料水分对辊磨效果的影响以及闭路流程筛上产品干式磁选及筛下产品湿式磁选抛尾效果。研究表明:高压辊磨工艺可有效降低原矿颗粒尺寸,筛下物料经湿式磁选抛尾,抛尾率可达46.43%,精矿铁品位和回收率分别为42.26%和89.98%;筛上物料经干式磁选抛尾,效果较差,综合抛尾率仅为9.61%。In order to further improve the comprehensive benefits of the mine,in view of the prob⁃lems of low grinding grade and large grinding particle size in Jinshandian Iron Mine of Wuhan Iron and Steel Co.,Ltd.,the pre-concentration treatment test of raw materials was carried out by high pressure roll⁃er mill process.The effects of pressure,rotational speed and material moisture on the open-circuit process of high pressure roll mill and the effects of dry magnetic separation on the closed-circuit process and wet magnetic separation on the closed-circuit process were studied.The results show that the high pressure roll⁃er mill process can effectively reduce the particle size of the raw ore.The material under the sieve is dis⁃carded by wet magnetic separation,and the discarding rate can reach 46.43%.The iron grade and recovery of the concentrate are 42.26%and 89.98%,respectively.The material on the sieve was discarded by dry magnetic separation,the effect was poor,and the comprehensive discarding rate was only 9.61%.

关 键 词：高压辊磨 磁选 预处理 抛尾 筛分 

分 类 号：TD951[矿业工程—选矿]