辽宁某深埋铁矿石选矿试验

采用磨矿-弱磁选-中强磁选-中强磁选精矿再磨后反浮选工艺流程对辽宁某深埋铁矿石进行了选矿工艺研究。结果表明，对铁品位为29.22%、赤褐铁占总铁67.76%、脉石矿物以石英为主的试样，在磨矿细度为-0.043 mm占75%的情况下，经1次弱磁选（磁场强度为95.50 kA/m）。1次中强磁选，中强磁选精矿再磨至-0.038 mm占90%后经1粗1精3扫、中矿顺序返回反浮选，弱磁选精矿与反浮选精矿合并为最终精矿，其铁品位为67.26%、铁回收率为84.68%。试验指标理想，工艺流程简单，可作为该铁矿石资源开发利用的依据。

Mineral Processing Experiment of a Deep Buried Iron Ore from Liaoning

Mineral processing technology of grinding-low intensity magnetic separation-middle-high intensity magnetic separation-concentration via regrinding and reverse flotation was applied for a deep buried hematite ore from Liaoning.The results showed that the test sample with iron grade of 29.22%，the hematite and limonite occupied the whole of iron ore for 67.76%，the main gangue mineral was quartz.The sample was ground to the fineness of -0.043 mm accounted for 75%，which applied for the low intensity magnetic separation (magnetic field intensity was 95.50 kA/m)，the middle-high intensity magnetic separation，and the magnetic separation concentrate was grinding to -0.038 mm accounted for 90%，then endure one roughing，once cleaning，three scavenging，the middling return to the flowsheet in turn reverse flotation.The low intensity magnetic concentrate and the reverse flotation concentrate were merged into the total concentrate，which with the iron grade of 67.26%，the iron recovery of 84.68%.Ideal technical indicators were achieved and process flow was simple，which can be the basis for the exploitation and utilization of iron ore resources.