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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1 500℃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。
The process is to reduce the manganese iron ore with coke in a submerged arc furnace, and the temperature of the reduction reaction is controlled to be below 1,500 ° C. The slag basicity ω (CaO) / ω (SiO 2) is 0.16 and the mass fraction of SiO 2 is 18% , The mass fraction of MnO produced in the manganese-rich slag is not less than 70%, and carbon ferromanganese by-product is produced at the same time. Then, the manganese-rich slag is heat-exchanged into a shaker furnace, and the slag is refined by lime refining to raise the alkalinity to 2.0, which is favorable for removing phosphorus and sulfur and reducing the activity of SiO2. Finally, the industrial furnace is added to the furnace to reduce and reconcile the manganese in the slag to obtain metallic manganese with a manganese content of not less than 99%, and the energy-saving effect is obvious.