烟煤包覆磁铁矿粉的还原行为分析

Reduction Behavior of Bituminous Coal Coated Magnetite Powder

为了抑制铁矿粉在流化态还原过程中发生粘结失流,采用了烟煤包覆磁铁矿粉的方法。针对还原过程中矿粉形貌研究了烟煤包覆磁铁矿粉的还原行为,对不同温度下烟煤包覆磁铁矿粉的还原试样进行了SEM、EDS、XRD表征,并进行了对比分析。结论证实了升温可以有效提高固体碳与铁矿粉的反应进程,以及烟煤碳包覆磁铁矿粉可以有效地抑制铁晶须的生成。

In order to restrain the agglomeration and loss of flow of iron ore powder in fluidized reduction process,the method of bituminous coal coated magnetite powder was adopted.The reduction behavior of bituminous coal coated magnetite powder was studied the morphology based on ore powder during reduction.The reduction samples of bituminous coal coated magnetite powder at different temperatures were characterized by SEM,EDS and XRD,and the results were compared and analyzed.It is concluded that the reaction process between solid carbon and iron ore powder can be effectively improved by increasing temperature,and the formation of iron whiskers can be effectively inhibited by coating magnetite powder with bituminous coal carbon.