用矿热炉和摇炉生产金属锰的工艺探讨

该工艺是在矿热炉中用焦炭还原锰铁矿石，将还原反应的温度控制为1500℃以下，渣碱度ω(CaO)/ω(SiO2)为0.16，SiO2的质量分数为18%，生产出的富锰渣中MnO的质量分数不小于70%，同时有副产物碳素锰铁产生。然后将富锰渣热兑入摇炉中，加石灰精炼生产调和渣，使其碱度提高到2.0，这样有利于脱除磷、硫，并降低SiO2的活度。最后在摇炉中加入工业硅还原调和渣中的锰，获得锰质量分数不小于99%的金属锰，节能效果明显。

Discussion on process of smelting metal manganese by submerged arc furnace and rocking furnace

In submerged arc furnace，coke was used to reduce manganese iron ore in process，reaction temperature was strictly controlled under 1500℃，slag basicity ω(CaO)/ω(SiO2) was 0.16，mass fraction of SiO2 was 18%，mass fraction of MnO in manganese rich slag was not less than 70%. Meanwhile，byproduct carbon ferromanganese was produced. Hot rich-manganese slag was poured into rocking furnace to refine and product harmonic slag which basicity will be increased to 2.0. This condition was beneficial to remove P and S，and decreased activity of SiO2. Finally，industrial silicon was added to reduce Mn of harmonic slag and get metal manganese，in which mass fraction of Mn was not less than 99% in rocking furnace. It can have a remarkable energy saving effect.