贵州某褐铁矿可选性试验

为确定贵州某褐铁矿的开发利用方案，进行了磁化焙烧-弱磁选工艺技术条件研究。结果表明，在煤粉添加量为8%、焙烧温度为850 ℃、焙烧时间为60 min、焙烧产物磨矿细度为 -0.074 mm占75%、弱磁选磁场强度为151.27 kA/m情况下，采用1粗1精1扫、中矿集中返回流程处理该矿石，可获得铁品位为61.14%、铁回收率为89.80%的铁精矿。

Beneficiation Tests on a Limonite in Guizhou Province

Magnetic roasting, low intensity magnetic separation mineralogical research was conducted in order to find a suitable way to develop and utilize a limonite in Guizhou. The results show that with the 8% dosage of coal powder, roasted at 850 ℃ for 60 min, roasted products grinding at fineness of 75% passing 0.074 mm, with intensity of 151.27 kA/m for low intensity magnetic separation, through one roughing, one cleaning, one scavenging, middles back to the flowsheet in turn process, iron concentrate with iron grade of 61.14%, iron recovery of 89.80% was achieved.