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金属矿山 ›› 2008, Vol. 38 ›› Issue (05): 146-148.

• 综合利用 • 上一篇    下一篇

硫酸渣用磁化焙烧工艺分选铁精矿的研究与应用

董风芝,姚德,孙永峰   

  1. 山东理工大学
  • 收稿日期:2008-03-20 出版日期:2008-05-15 发布日期:2011-07-19
  • 基金资助:

    山东省教育厅科技计划项目(编号:J06D04)。

Investigation and Application of Magnetization-Roasting Process for Iron Separation from Pyrite Cinder

Dong Fengzhi,Yao De,Sun Yongfeng   

  1. Shandong University of Technology
  • Received:2008-03-20 Online:2008-05-15 Published:2011-07-19

摘要: 对硫酸渣回收铁精矿的磁化焙烧工艺进行了试验研究,在焙烧温度800 ℃、焙烧时间15 min、掺碳量7%的条件下,磁化焙烧较为理想。经一段磨矿、3次磁选可获得精矿品位65.30%、回收率83.54%、产率67.60%的铁精矿。磁化焙烧工艺中试生产线取得了铁精矿品位64.71%、回收率86.85%、产率70.92%、硫含量0.23%的指标。每吨精矿加工成本110元左右,经济效益十分显著。

关键词: 硫酸渣, 铁精矿, 磁化焙烧

Abstract: Investigation was made on the magnetization-roasting process for recovering iron from pyrite cinder. At a roasting temperature of 800 ℃, roasting time of 15 min, and carburizing rate of 7%, the magnetization effect was ideal. An iron concentrate grading 65.03% at a recovery of 83.54% and yield of 67.60% could be obtained by one-stage grinding and three stage magnetic separation. In the test production line adopting the magnetization-roasting process, an iron concentrate grading 64.71% at a recovery of 86.85% and yield of 70.92% and containing 0.23% sulfur was obtained. The per-ton processing cost of concentrate was about RMB 110, very obvious economic benefit.

Key words: Pyrite cinder, Iron concentrate, Magnetization-roasting process