1、内蒙古科技大学毕业设计说明书 I 摘摘 要要 巴润矿业公司选矿厂年处理原矿能力为1100万吨， 给矿粒度为1200-0 毫米。 白云鄂博铁矿西矿矿石的组成矿物种类繁多，但大多含量甚微，对选 矿意义不大，可供选矿回收的有用矿物以铁矿物为主，但其中又以磁铁矿 居多，磁性率在 21.29%左右，采用单一磁选工艺。 工艺流程介绍如下：破碎为三段一闭路。磨选为阶段磨矿阶段选别工 艺流程，一段磨矿分级的溢流给入一段弱磁，精矿产物品位为 52.50%、 产率为 44.50%、回收率为 75.34%；弱磁一尾矿进入中磁进行选别，其精 矿和弱磁一精矿混合进入二次分级设备进行二次分级， 分级溢流进入弱磁 二，弱磁
2、二精矿产物品位为 61.80%、产率为 36%、回收率为 71.40%。磁 选精矿接着给入细筛， 筛下品位为 62.81%、 产率为 35 %、 回收率为 70.89%。 筛下产物给入弱磁三，弱磁三精矿进入弱磁四得到最终精矿，品位为 67.30%、产率为 31.50%、回收率为 68.36%。 关键词：关键词：磁选；阶段磨矿；阶段选别 内蒙古科技大学毕业设计说明书 II ABSTRACT Baron in processing ore mining company concentrator capacity of 1,100 tons of ore particle size to the 1
3、200-0 mm. West Ore Iron Ore mineral composition of a wide range, but most content little, little significance to the mineral processing, mineral processing for recovery of useful minerals iron mineral-based, but among which the majority of magnetite, magnetic rate In about 21.29%, using a single mag
4、netic separation technology. Process described below: broken into three parts, a closed circuit. Selected stage grinding mill stage sorting process, a grinding and classification section of the overflow to enter the weak magnetic concentrate grade of 52.50% product yield was 44.50%, recovery was 75.34%; weak magnetic one into the magnetic mine for selection, the weak magnetic concentrate and a concentrate mixture into the second grade of secondary grading equipment, overflowing into the weak
