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金属矿山 ›› 2010, Vol. 39 ›› Issue (2): 57-61.

• 矿物工程 • 上一篇    下一篇

某鲕状赤铁矿循环流化床焙烧-磁选试验研究

王国军,王智化,杨丽,黄镇宇,周俊虎,岑可法   

  1. 浙江大学
  • 出版日期:2010-02-15 发布日期:2010-11-09
  • 基金资助:

    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)。

Experiments on Roasting Technology Magnetic Separation of Oolitic Hematite Ore by the Circulating Fluidized Bed

 WANG  Guo-Jun, WANG  Zhi-Hua, YANG  Li, HUANG  Zhen-Yu, ZHOU  Jun-Hu, CEN  Ke-Fa   

  1. Zhejiang University
  • Online:2010-02-15 Published:2010-11-09

摘要: 采用实验室循环流化床装置,以CO与N2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。

关键词: 鲕状赤铁矿, 循环流化床, 还原磁化焙烧, 弱磁选

Abstract: 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 N2 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.

Key words: Oolitic hematite, Circulating fluidized bed(CFB), Magnetization roast, Low intensity magnetic separation