摘要
采用实验室循环流化床装置,以CO与N2的混合气体和电加热方式模拟燃煤还原焙烧气氛,对铁品位为47.20%的鄂西某鲕状赤铁矿进行磁化焙烧—弱磁选试验,结果表明,在合适的焙烧温度、焙烧时间、焙烧气氛、气体流量、磁场强度及-325目占80%的最终磨矿细度下,经过循环流化床焙烧—阶段磨矿—一粗一精两段弱磁选,可获得精矿铁品位为56.60%,对焙烧矿铁回收率为77.79%的较好选别指标。
Experiments of magnetizing roasting and low intensity magnetic separation on the oolitic hematite （TFe 47.20% ） in the west of Hubei were carried out by simulating the condition of coal-burning reduction roasting by heating with mixture of CO and N2 and electricity. The results showed that at suitable roasting temperature, roasting time, roasting atmosphere, gas flow and magnetic intensity and the final grinding at -325 mesh 80%, a good concentrate grading of 56.60% at a 77.79% recovery can be obtained by the process of the circulating fluidized bed（CFB）-stage grinding-two low intensity magnetic separations of one-roughing and one-cleaning.
出处
《金属矿山》
CAS
北大核心
2010年第2期57-61,共5页
Metal Mine
基金
教育部博士点基金新教师基金项目(编号:200803351056)
教育部和国家外国专家局高等学校学科创新引智计划项目(编号:B08026)
关键词
鲕状赤铁矿
循环流化床
还原磁化焙烧
弱磁选
Oolitic hematite, Circulating fluidized bed（ CFB）, Magnetization roast, Low intensity magnetic separation
