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金属矿山 ›› 2009, Vol. 39 ›› Issue (05): 57-59.

• 矿物工程 • 上一篇    下一篇

某鲕状赤铁矿磁化焙烧—磁选试验研究

王成行,童雄,孙吉鹏   

  1. 昆明理工大学
  • 出版日期:2009-05-15 发布日期:2011-11-09

Research on the Magnetizing Roasting and Magnetic Separation of an Oolitic Hematite Ore

Wang Chenghang,Tong Xiong,Sun Jipeng   

  1. Kunming University of Science and Technology
  • Online:2009-05-15 Published:2011-11-09

摘要: 磁化焙烧技术是提高难选铁矿资源综合利用率的有效途径之一。对某鲕状赤铁矿进行了磁化焙烧的影响因素的试验研究,确定了最优的磁化焙烧—弱磁选工艺条件为无烟煤5%,焙烧温度850 ℃,焙烧时间60 min,磨矿细度-0.074 mm占70%,弱磁选磁场强度145.6 kA/m。在此最优条件下,得到了铁品位和回收率分别为58.40%和87.86%的铁精矿指标,精矿中的硫达到冶炼要求,可以作配料使用;磷超标,如直接作为冶炼原料,尚需进一步试验研究。

关键词: 鲕状赤铁矿, 磁化焙烧, 弱磁选工艺, 难选铁矿石

Abstract: Magnetizing roasting is one of the effective ways to improve the comprehensive utilization of refractory iron ores. The factors influencing the magnetizing-roasting of an oolitic hematite ore were studied and the optimal conditions of the process of magnetizing roasting-low intensity magnetic separation were determined to be: 5% anthracite, 850 ℃ roasting temperature, 60 min roasting time, 70%-0.074 mm grinding size and 145.6 kA/m magnetic field intensity. At these optimal conditions, an iron concentrate grading 58.40% at an 87.86% iron recovery was obtained, with the sulfur content reaching the metallurgical requirement, which can be used as a component. However, it has a phosphorus content exceeding the standard, and a further study has to be made on its use as a direct metallurgical material.

Key words: Oolitic hematite, Magnetizing roasting, Low intensity magnetic separation, Refractory iron ore