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金属矿山 ›› 2016, Vol. 45 ›› Issue (12): 18-21.

• 矿物工程 • 上一篇    下一篇

东鞍山铁矿混磁精矿悬浮焙烧—弱磁选试验研究

高鹏,余建文,张淑敏,韩跃新   

  1. 东北大学资源与土木工程学院,辽宁 沈阳 110819
  • 出版日期:2016-12-15 发布日期:2017-02-16
  • 基金资助:

    基金项目:国家自然科学基金项目(编号:51674064,51674065),中央高校基本科研业务费项目(编号:N140108001,N150106003)。

Experimental Study on Suspension Roasting-Low Intensity Magnetic Separation of Magnetic Mixed Concentrate from Donganshan

Gao Peng,Yu Jianwen,Zhang Shumin,Han Yuexin   

  1. School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China
  • Online:2016-12-15 Published:2017-02-16

摘要: 磁化焙烧技术是处理难选铁矿资源典型、有效的方法。采用实验室间歇式悬浮焙烧炉,以高纯N2和H2的混合气体作为还原气体,在气体流量为8 m3/h、H2浓度为30%、焙烧温度为650 ℃、焙烧时间为8 s条件下,对东鞍山铁矿铁品位为43.92%为的混磁精矿进行悬浮焙烧,焙烧产品磨细至-0.038 mm占85%,在磁场强度为80 kA/m条件下弱磁选,获得了铁品位为65.48%、回收率为88.26%的精矿。为我国含碳酸盐铁矿资源的高效利用提供了新途径。

关键词: 含碳酸盐铁矿石, 悬浮焙烧, 弱磁选

Abstract: Magnetizing roasting pretreatment has been proven as a typical and effective method for the beneficiation of refractory iron ores.Magnetizing roasting via a laboratory-batch scale fluidized reactor was carried out for the beneficiation of a carbonates-bearing hematite ore,and it was performed under mixed H2 and N2 atmosphere.The optimized conditions were determined as gas flow 8 m3/h,hydrogen concentration 30%,roasting temperature 650 ℃ and reduction time 8 s.The roasted products ground to 85% -0.038 mm,via low intensity magnetic separation at field intensity of 80 kA/m,iron concentrate containing 65.48% Fe and recovery of 88.26% was achieved.The results provided a new way for the efficient utilization of carbonates-bearing hematite iron ores.

Key words: Carbonates-bearing hematite ore, Suspension roasting, Low intensity magnetic separation