Carbon dissolution from four types of metallurgical cokes and graphite was investigated by using immersion rods in a resistance furnace to clarify the influence of factors governing the rate of carbon dissolution from...Carbon dissolution from four types of metallurgical cokes and graphite was investigated by using immersion rods in a resistance furnace to clarify the influence of factors governing the rate of carbon dissolution from carbonaceous materials into Fe-Mn melts at 1550℃.The factors studied were the nmicrostructure of carbonaceous materials,roughness,porosity and the wettability between carbonaceous materials and the melt.Carbon/metal in terface was characterised by sea nning electron microscopy accompanied with energy-dispersive X-ray spectrometry to investigate the form at io n of an ash layer.The results showed that coke E had the highest dissolution rate.Surface roughness and porosity of the carbonaceous materials seemed to be dominant factors affecting the dissolution rates.Further,crystallite size did not have a significant effect on the dissolution rates.Solid/liquid wettability seemed to affect the initial stage of dissolution reaction.The dissolution mechanism was found to be both mass transfer and interfacial reactions.展开更多
基金funded by Department of Materials Science and Engineering of Norwegian University of Science and Technology(NTNU)in cooperation with the SFI Metal production(NRC 237738).
文摘Carbon dissolution from four types of metallurgical cokes and graphite was investigated by using immersion rods in a resistance furnace to clarify the influence of factors governing the rate of carbon dissolution from carbonaceous materials into Fe-Mn melts at 1550℃.The factors studied were the nmicrostructure of carbonaceous materials,roughness,porosity and the wettability between carbonaceous materials and the melt.Carbon/metal in terface was characterised by sea nning electron microscopy accompanied with energy-dispersive X-ray spectrometry to investigate the form at io n of an ash layer.The results showed that coke E had the highest dissolution rate.Surface roughness and porosity of the carbonaceous materials seemed to be dominant factors affecting the dissolution rates.Further,crystallite size did not have a significant effect on the dissolution rates.Solid/liquid wettability seemed to affect the initial stage of dissolution reaction.The dissolution mechanism was found to be both mass transfer and interfacial reactions.
