庙沟铁矿提铁降硅工艺改造实践

Technical Transformation Practice of Miaogou Iron Mine for Iron Increase & Silica Decrease

庙沟铁矿矿石性质复杂,嵌布粒度极细。原工艺流程长,能耗高,铁精矿品位在60%～63%之间,SiO2含量高达8.75%。选用磁场筛选机、精选淘洗机以及高频振网筛等设备,以全磁选流程对原有工艺流程进行改造,获得铁精矿品位达到65.00%以上,SiO2含量降到6.83%,达到了提铁降硅的目的,提高了选厂的综合经济效益。

Miaogou iron ore has complex properties and extremely fine dissemination size. Its original beneficiation process was long and consumed large amount of energy, with the iron concentrate containing 60% -63% iron and as high as 8.75% SiO2. A full magnetic separation process with equipment such as magnetic field screen, elutriating machine for cleaning and high frequency vibration mesh screen was adopted to transform the original process, which achieved an iron concentrate having an iron grade as high as above 65.00% and a reduced SiO2 content of 6.83%. As a result, the objective of iron increase and silica reduction was achieved, improving the comprehensive economic benefit of the concentrator.