某鲕状赤铁矿石低温连续悬浮焙烧试验  

Continuous Suspension Roasting Experiments on an Oolitic Hematite Ore at Low Temperature

作　　者：陈超[1,2,3] 刘亚川[1,2,3] 张裕书[1,2,3] 张少翔[1,2,3] 

机构地区：[1]中国地质科学院矿产综合利用研究所,四川成都610041 [2]国土资源部钒钛磁铁矿综合利用重点实验室,四川成都610041 [3]中国地质调查局金属矿产资源综合利用技术研究中心,四川成都610041

出　　处：《金属矿山》2015年第11期70-73,共4页Metal Mine

基　　金：中国地质大调查项目(编号:12120113087600)

摘　　要：中国地质科学院矿产综合利用研究所与东北大学联合研制了连续悬浮焙烧炉,为检验某应用于鲕状赤铁矿石开发的可能性,采用该炉进行悬浮磁化焙烧—弱磁选选矿试验。结果表明,-0.3 mm的某鲕状赤铁矿石在焙烧温度为575℃,还原气体CO的体积分数为90%(N2的体积分数为10%)、总流量为6 m3/h的情况下以100 kg/h的给矿速度连续悬浮焙烧,焙烧产物磨至-0.074 mm占90%后用400×300型筒式弱磁选机1次弱磁选(磁场强度为120 k A/m),获得的精矿铁品位为56.22%、铁回收率为88.84%。悬浮焙烧过程的特点及弱磁选精矿指标表明,连续悬浮焙烧炉可实现鲕状赤铁矿石的高效、低耗开发利用。To test the possibility of develop oolitic hematite ore utilization using continuous suspension roaster developed by Institute of the Multipurpose Utilization of Mineral Resource and Northeastern University,suspension magnetic roasting-low intensity magnetic separation was conducted. The results showed that the -0. 3 mm oolitic hematite ore was roasted at the con-ditions of temperature 575℃,CO volume concentration 90%（ N2 volume concentration 10%） ,and total gas flow 6 m3/h,feed-ing rate of 100 kg/h and roasted products ground to-0. 074 mm 90%,and then beneficiated by low intensity magnetic separa-tion on Ф400×300 low intensity magnetic separator at the field intensity of 120 kA/m,concentrate with iron grade 56. 22% and recovery 88. 84% was obtained. The features of the suspension roasting and the index of the concentrate affirm continuous sus-pension roaster can realize high efficiency and low consumption utilization of oolitic hematite ore.

关 键 词：鲕状赤铁矿石 连续悬浮焙烧炉 流态化焙烧 还原 

分 类 号：TF046[冶金工程—冶金物理化学] TD924.12[矿业工程—选矿]