张庄铁矿石提铁降硅选矿试验及超纯铁精矿探索试验
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摘要
为将马钢张庄铁矿现场铁品位为65.52%的铁精矿中的SiO_2含量降低至4%,进行了张庄铁矿石的提铁降硅选矿试验。试验通过采用粗粒预选—一段磨矿—1次弱磁选—二段磨矿—1粗1精弱磁选—三段磨矿—1粗1精弱磁选工艺流程,可获得铁精矿产率37.35%、全铁品位68.97%、含SiO_2 3.70%的良好指标,可为现场技术改造提供参考。另将三段磨矿细度放细到-0.030 mm 90%的条件下,进行了用弱磁精矿生产超纯铁精矿的探索试验,采用反浮选工艺脱硅,最低可获得SiO_2含量0.26%、全铁品位为71.58%的高纯铁精矿。
In order to reduce the content of SiO_2 in iron concentrate with iron grade of 65.52% to 4%,Zhangzhuang Iron Mine had carried out a test for iron increasing and silicon reduction.By adopting the process flowsheet of coarse grain preseparation-first stage grinding-one stage low intensity magnetic separation-second stage grinding-one roughing and one cleaning low intensity magnetic separation-third stage grinding-one roughing and one cleaning magnetic separation process,the concentrate with the yield of 37.35%,total iron grade of 68.97% and SiO_2 content of 3.70% can be obtained,which can provide reference for on-site technical transformation.Under the condition that the fineness of third stage grinding was reduced to-0.030 mm 90%,the exploratory test of producing ultra-pure iron concentrate with low-intensity magnetic concentrate was carried out.By using reverse flotation process,the ultra-pure iron concentrate containing 0.26% SiO_2 and total iron grade of 71.58% can be obtained.
In order to reduce the content of SiO_2 in iron concentrate with iron grade of 65.52% to 4%,Zhangzhuang Iron Mine had carried out a test for iron increasing and silicon reduction.By adopting the process flowsheet of coarse grain preseparation-first stage grinding-one stage low intensity magnetic separation-second stage grinding-one roughing and one cleaning low intensity magnetic separation-third stage grinding-one roughing and one cleaning magnetic separation process,the concentrate with the yield of 37.35%,total iron grade of 68.97% and SiO_2 content of 3.70% can be obtained,which can provide reference for on-site technical transformation.Under the condition that the fineness of third stage grinding was reduced to-0.030 mm 90%,the exploratory test of producing ultra-pure iron concentrate with low-intensity magnetic concentrate was carried out.By using reverse flotation process,the ultra-pure iron concentrate containing 0.26% SiO_2 and total iron grade of 71.58% can be obtained.
引文
[1] 齐美超,吴红,叶献华.张庄铁矿湿抛尾矿捞砂工业试验[J].现代矿业,2018(1):167-168,180.
[2] 王欢.白象山选矿厂主厂房工艺优化[J].现代矿业,2016(11):108-109.
[3] 李新,丁亚卓,印万忠.庙沟铁矿提铁降硅工艺改造实践[J].金属矿山,2009(5):63-66.
[4] 孙平.鞍钢弓长岭选矿厂“提铁降硅”改造的实践[J].金属矿山,2002(12):41-43,46.
[5] 陶红标,曹学锋,卢建安.河北某磁选铁精矿反浮选提铁降硅试验[J].金属矿山,2013(9):64-66.
[2] 王欢.白象山选矿厂主厂房工艺优化[J].现代矿业,2016(11):108-109.
[3] 李新,丁亚卓,印万忠.庙沟铁矿提铁降硅工艺改造实践[J].金属矿山,2009(5):63-66.
[4] 孙平.鞍钢弓长岭选矿厂“提铁降硅”改造的实践[J].金属矿山,2002(12):41-43,46.
[5] 陶红标,曹学锋,卢建安.河北某磁选铁精矿反浮选提铁降硅试验[J].金属矿山,2013(9):64-66.