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金属矿山 ›› 2016, Vol. 45 ›› Issue (12): 43-47.

• 矿物工程 • 上一篇    下一篇

内配残煤对某低品位铁矿石小球团还原—弱磁选影响研究

黄柱成,黄遥,姚圣杰   

  1. 中南大学资源加工与生物工程学院,湖南 长沙 410083
  • 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:51234008)。

Effect of Inner Residual-coal on Reduction and Low Intensity Magnetic Separation of Low Grade Iron Ore Mini-Pellets

Huang Zhucheng,Huang Yao,Yao Shengjie   

  1. School of Mineral Processing and Bioengineering,Central South University,Changsha 410083,China
  • Online:2016-12-15 Published:2017-02-16

摘要: 将回转窑还原后的残煤和原煤按比例混合作为内配煤,研究了某低品位铁矿石内配残煤对其还原—弱磁选的影响。结果表明:低品位铁矿石内配残煤不利于铁氧化物的快速还原和铁晶粒长大,焙烧小球金属化率有所降低,但能降低内配煤焙烧小球的孔隙率,提高小球的抗压强度;残煤配比为50%时,磨矿—弱磁选指标较好。

关键词: 低品位铁矿石, 残煤, 球团, 还原&mdash, 弱磁选

Abstract: Effect of residual-coal proportion on reduction-low intensity magnetic separation of low grade iron ore was studied,using mixture of residual-coal which had been reacted in rotary kiln and the raw coal in a property ratio as inner coal.The results show that the inner residual-coal in low grade iron ore pellets was not conducive to rapid reduction of iron oxide and growing up of iron grain,and metallization rate of mini-pellets decreased.But the strength of pellets was improved due to decrease of roasting pellets porosity.The grinding-low intensity magnetic separation index were preferable as the proportion of the residual-coal in inner coal was 50%.

Key words: Low grade iron ore, Residual-coal, Pellet, Reduction-low intensity magnetic separation