墨西哥某含硫铁矿石提质降杂选矿试验研究

对铁品位62.26%、含硫3.14%的墨西哥某含硫铁矿石开展了提质降杂选矿试验研究。采用浮选-弱磁选-强磁选工艺,可获得精矿产率87.12%、铁回收率92.59%、TFe品位65.17%、S含量0.261%、SiO2含量3.86%的综合铁精矿,同时获得产率7.53%、S品位37.22%的合格硫精矿。该高硫铁矿配入梅山自产原矿混合选铁,生产中通过提高强磁扫选磁场强度,在保证最终铁精矿品位57%前提下,可多从尾矿中回收铁品位32%的弱磁性矿物。

Upgrading Concentrate from Mineral Processing of Mexican Sulfur-Bearing Iron Ore

To process a Mexican sulfur-bearing iron ore with iron grade of 62.26% and sulfur content of 3.14%, experiments were performed to improve concentrate quality and reduce impurities therein by adopting a processing technique consisting of flotation, low intensity magnetic separation (LIMS) and high intensity magnetic separation (HIMS).  A comprehensive iron concentrate was obtained with a yield of 87.12%, iron recovery of 92.59%, TFe grade of 65.17%, S content of 0.261% and SiO2 content of 3.86%, and a qualified sulfur concentrate was also recovered with a yield of 7.53% and S grade of 37.22%. In the production, this high-sulfur iron ore is blended into the Meishan local raw iron ore. It is shown more weak-magnetic iron minerals grading 32% Fe can be recovered from the tailings by increasing the magnetic field strength of HIMS at the stage of scavenging, while ensuring the final iron concentrate grade at 57%.