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。
Ruyang Molybdenum Mine originally adopted a simple flowsheet of direct low intensity magnetic separation to recover the magnetite from the railings 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.
出处
《金属矿山》
CAS
北大核心
2008年第8期148-150,共3页
Metal Mine
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
Tailings of molybdenum flotation, Magnetite, Comprehensive recovery, Staged grinding-separation, Tube mill, Technical transformation
