某复杂难选红铁矿磁化焙烧-磁选工艺及机理研究  

Study on the Technology and Mechanism of Magnetic Roasting and Separation of a Refractory Red Iron Ore

作　　者：黄红军[1] 胡岳华[1] 杨帆[1] 孙伟[1] 

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《矿冶工程》2010年第6期38-41,共4页Mining and Metallurgical Engineering

摘　　要：对某复杂难选红铁矿进行了磁化焙烧-磁选工艺研究。试验结果表明,在焙烧温度为950℃,焙烧时间为15 min,碳粉(0～1 mm)用量为15%,磁场强度为0.16 T,磨矿粒度-0.074 mm粒级占87%左右的条件下,可获得Fe含量为63.06%、回收率为88.45%的铁精矿。磁化焙烧-磁选机理研究表明,红铁矿经磁化焙烧后的产品呈疏松多孔结构,有利于磨矿作业;红铁矿在950℃下磁化焙烧15 min,焙烧产品的物相仅为Fe3O4。Technology of magnetic roasting and separation for a complex refractory red iron ore was studied and the corresponding mechanism was analyzed.The results show that an iron concentrate with an iron grade of 63.06% and recovery of 70.54% can be obtained under the conditions of calcination temperature of 950 ℃,calcination time of 15 min,carbon powder（0～1 mm） content of 15%,magnetic field intensity of 0.16 T and grinding fineness（-0.074 mm） about 87%.The research on the mechanism of magnetic roasting and separation indicates that,according to the phase analysis,the only structure of red iron ore calcined for 15 minutes at 950 ℃ is Fe3O4,and,as the calcined powder is loose and porous,it shows an advantage for grinding operation.

关 键 词：红铁矿 磁化焙烧 磁选 

分 类 号：TD92[矿业工程—选矿]