甲醇/乙醇-氢气还原铁矿石制备Fe3C研究
Fabrication of iron carbide by methanol/ethanol and hydrogen during iron ore reduction
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摘要: 鉴于工业上成功采用CH4-H2系和CO-H2系气体作为还原剂制备Fe3C, 尝试以甲醇作为碳源, 同氢气共同还原铁矿石制备Fe3C.试验考察温度、氢还原时间、甲醇量对碳化铁率的影响.采用扫描电镜分析、XRD测试等手段研究产物的物相组成.结果表明:在反应温度700 ℃, 无水甲醇量高于60 mL, 氢还原时间120 min的试验条件下, 达到高效生产Fe3C的目的.该工艺方法流程简单, 操作条件温和, 具有广阔的应用前景.在此基础上, 用乙醇代替甲醇, 研究其还原效果.Abstract: Considering the industrial production of Fe3C by applying CH4-H2 and CO-H2 gas as reducing agents, Fe3C was attempted to produce by adopting hydrogen and methanol gas, the latter produced by the vaporization of anhydrous methanol. The effects of temperature, hydrogen reaction time and methanol content on iron carbide rate are investigated. Phase composition of the products is studied by SEM and XRD. The results indicate that the experiment attains the goal of high efficient production when the temperature is 700 ℃, the volume of anhydrous methanol is more than 60 mL, hydrogen reduction time is 120 min. The method has a good application prospect due to its simple process, mild operation condition. On this basis, the reduction performance was studied by replacing ethanol with methanol.