论文部分内容阅读
针对某铁品位为30.16%低品位褐铁矿,采用制粒—气基磁化焙烧—磁选工艺进行了试验研究。结果表明,对小球粒度为5～2 mm,混合气体CO、CO2、N2体积比为1∶2∶2,磁化焙烧料层厚度200 mm,焙烧温度为725℃,保温时间为10 min的磁化焙烧产品进行磨选试验,在磨矿细度为-0.074 mm占85%、弱磁选磁场强度为100 kA/m情况下,可以获得铁品位为59.78%、铁回收率达86.19%的弱磁精矿。
Aiming at the low-grade limonite with an iron grade of 30.16%, the pellet-air-based magnetization roasting-magnetic separation process was studied. The results show that for the microspheres with the size of 5 ~ 2 mm, the mixed gas of CO, CO2, N2 volume ratio of 1: 2: 2, magnetized roasting layer thickness of 200 mm, calcination temperature of 725 ℃, holding time of 10 min magnetization In the grinding test of roasted products, the weak magnetic fluxes with the grade of 59.78% Fe and the iron recovery rate of 86.19% can be obtained under the condition of the grinding fineness is -0.074 mm and the weak magnetic field strength is 100 kA / m. Concentrate.