中文摘要：

采用柱体高度为80mm、底锥锥角为90°的Ф50mm旋流器对太钢尖山铁矿选矿厂作为反浮选给矿的弱磁选精矿进行精选试验，在溢流管插入深度为50mm、溢流管直径为15mm、沉砂口直径为8mm、给矿压力为0．04MPa、给矿浓度为23％的条件下，获得了作业产率为36．03％、铁品位为69．03％、SiO：含量为3．89％、作业铁回收率为38．94％的最终铁精矿，证明旋流器可以将部分合格铁精矿提前选出从而减少反浮选入选量，达到降低选矿成本，减轻环境污染的目的。

英文摘要：

The concentration tests on low intensity magnetite rougher concentrate of inverse flotation for the concentrator of Jianshan iron mine of Taisteel are carried out by adopting q550 mm cyclones with the column height of 80 rain and bottom cone angle of 90°. Under conditions of the overflow pipet immersion depth of 50 mm and diameter of 15 mm, the spigot diameter of 8 ram, feeding pressure of 0. 04 MPa and feeding concentration of 23% , final iron concentrate with yield of 36. 03% , iron grade of 69.03% , SiO2 content of 3.89% and the operating iron recovery of 38.94% was obtained. It is confirmed that the cyclones can separate parts of qualified iron concentrate in advance and reduce the amount of feed in inverse flotation so as to lower the separation cost and reduce the environment pollution.