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金属矿山 ›› 2008, Vol. 38 ›› Issue (08): 148-150.

• 综合利用 • 上一篇    下一篇

汝阳钼矿综合回收磁铁矿工艺的技术改造

李红卫,徐引行   

  1. 金堆城钼业汝阳有限责任公司
  • 收稿日期:2008-06-10 出版日期:2008-08-15 发布日期:2011-07-15

Technical Transformation of the Process for the Comprehensive  Recovery of Magnetite in Ruyang Molybdenum Mine

Li Hongwei,Xu Yinxing   

  1. Ruyang Co., L td, Jinduicheng Molybdenum Group
  • Received:2008-06-10 Online:2008-08-15 Published:2011-07-15

摘要: 汝阳钼矿原采用直接弱磁选的简单流程从浮钼尾矿中综合回收磁铁矿,但由于磁铁矿嵌布粒度极细,铁精矿品位仅为20%左右。为此,汝阳钼矿经过两次技术改造,最终采用两段再磨的阶段磨选工艺,并且在二段采用管磨机以及旋流器直接串联的二次分级方式,使二段再磨细度达到-400目占95%以上,铁精矿品位超过63%,回收率较第2次改造前提高1个多百分点,为矿山带来了显著的经济效益。

关键词: 浮钼尾矿, 磁铁矿, 综合回收, 阶段磨选, 管磨机, 技术改造

Abstract: Ruyang Molybdenum Mine originally adopted a simple flowsheet of direct low intensity magnetic separation to recover the magnetite from the tailings of molybdenum flotation. However, the iron concentrate had an iron grade of only about 20% due to a very fine dissemination particle size of the magnetite. Therefore, the mine finally adopts a two-staged grinding-separation process after two technical transformations. And a secondary classification featuring a tube mill in direct connection with hydrocyclones in the secondary stage grinding, enabling the final grind fineness to be over 95% -400 mesh, the iron ore to have a grade of higher than 63% and the recovery to increase by more than one percentage point compared to that before the second technical transformation. This has brought remarkable economic benefits to the mine.

Key words: Tailings of molybdenum flotation, Magnetite, Comprehensive recovery, Staged grinding-separation, Tube mill, Technical transformation