TEMPERATURE GRADIENT DURING THE REDUCTION OF SELF-REDUCING CHROMITE PELLETS

摘要

The reaction rate of self-reducing agglomerates is very dependent on temperature and how fast is the evolution of temperature from the periphery to the center of the agglomerate. The temperature gradient is dependent on the heat flow from the surface to inner part which is affected by many factors like components and phases, particle size, porosity, chemical reactions, counter-flow of generated gases, etc. This gradient is higher: i) at the beginning of heating;;ii) at high temperatures;;iii) for highly endothermic reactions, such as for chromite carbothermic reduction reaction;;iv) for large agglomerates.