1、内蒙古科技大学毕业论文 外购铁精矿再磨再选工艺现状调查及分析外购铁精矿再磨再选工艺现状调查及分析 摘摘 要要 随着钢产量的增加,包钢除采用自产铁精矿外,一直配加部分外购铁精矿。 外购铁精矿 来源较杂,成分、 粒度都很不稳定,特别是硅含量偏高,粒度偏粗,铁品位在 60 %66 %之间, 硅在 4 %10 %之间,用于高炉生产易造成波动。 针对这一问题,选矿厂经过大量的试验研 究,提出了利用闲置的选矿系列对外购铁精矿再磨再选提铁降硅的选矿工艺,为高炉的生 产提供了精料，提高高炉利用系数，提高铁精粉品位，对外购铁精矿采用“磨矿-弱磁选 -电磁螺旋柱-细筛-细磨-弱磁选”工艺流程，可实现再磨铁精矿品位
2、达到 69%。 关键词：关键词：再磨再选；细筛；铁精矿；电磁螺旋柱；弱磁选 内蒙古科技大学毕业论文 Outsourcing iron concentrate again choose status grinding Investigation and chromatography Abstract With the growth of the steel product , in addition to the locally produced iron ore concentrate , Baogang also uses the out - purchased iron ore conce
3、ntrate as an addition. The out - purchased iron ore concentrates are from many different places ,so both the composition and the particle size is not stable , especially the silicon content of those is higher and the particle size larger , and with the iron grade in 60 % - 66 % and silica in 4 % - 1
4、0 % , likely causing fluctuation in the blast furnace production. To this problem , a lot of research work has been done in our plant and as a result , the laid off dressing means are used again to decrease the silica content and improve the iron concentrate grade of the out - purchased iron concentrate , proving the qualified concentrate to the blast furnace production.Increase of blast furnace, improve the grade of iron essence pink, purchase by foreign iron concentrate “grinding - low inten
