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金属矿山 ›› 2013, Vol. 42 ›› Issue (01): 73-75.

• 矿物工程 • 上一篇    下一篇

湖南某褐铁矿磁化焙烧—磁选试验

高照国1,2,曹耀华1,2,刘红召1,2,王威1,2   

  1. 1.中国地质科学院郑州矿产综合利用研究所;2.国家非金属矿资源综合利用工程技术研究中心
  • 出版日期:2013-01-15 发布日期:2013-01-23

Experiments on the Magnetic Roasting-Magnetic Separation of a Limonite in Hunan

Gao Zhaoguo1,2,Cao Yaohua1,2,Liu Hongzhao1,2,Wang Wei1,2   

  1. 1.Zhengzhou Mineral Resources Multi-purpose Utilization Institute of Chinese Academy of Geological Sciences;2.National Engineering Research Center for Multipurpose Utilization of Nonmetallic Mineral Resources
  • Online:2013-01-15 Published:2013-01-23

摘要: 以湖南某地隐晶质胶状结构为主的低硫磷褐铁矿样为对象,进行了磁化焙烧及磨选工艺技术条件研究。试验确定的适宜工艺技术条件为:造球用矿样粒度为-0.074 mm占35%、还原煤添加量为矿样质量的10%,适宜的焙烧温度为800 ℃、焙烧时间为80 min,焙烧产物碎磨细度为-0.045 mm占80%、弱磁选磁场强度为90 kA/m,经1粗1精弱磁选,最终可获得铁品位为58.83%、铁回收率为81.19%的弱磁选精矿。

关键词: 褐铁矿, 磁化焙烧, 弱磁选

Abstract: Taking a low-sulfur low-phosphorus limonite with the Aphanitic gel structures in Hunan as a case,the technical conditions of the magnetic roasting and grinding are studied.The optimal technical conditions are determined as follows: the fineness of pelletizing ore is -0.074 mm 35%,the dosage of reducing coal is 10% of the ore samples,the optimum sintering temperature is at 800 ℃ for 80 min,the grinding fineness of the calcined product -0.045 mm accounts for 80%,the magnetic field strength in the low intensity magnetic separation is 90 kA/m.Under the above conditions,the concentrate with Fe grade of 58.83% and Fe recovery of 81.19% was ultimately achieved by the process of one-roughing and one-cleaning low intensity magnetic separation.

Key words: Limonite, Magnetic roasting, Low intensity magnetic separation