Abstract:In order to study the influence of RH furnace chemical heating process on the cleanliness of IF steel. For the different stages of RH for chemical heating up, a systematic analysis of the three indexes, including the total oxygen of slab, number density distribution of inclusions and inclusions size was made to have a quantitative evaluation of the impact of RH chemical heating node and temperature on steel cleanliness. The results showed that when the RH was chemical heating up, the cleanliness of the steel was worse, and the total oxygen of the billet was increased by 0.000 8%- 0.001 3%. Under the condition of different heating points at the same temperature, in the case of RH temperature of 32- 36 ℃, the cluster inclusion size of 20 μm for scheme 4, was less than that of 30 μm for scheme 5. Therefore, adopting the heating process of "pre- decarbonization and terminal decarbonization", the inclusion size was less than that of "terminal decarburizing" heating process. In the production practice, if the molten steel entered the RH with low temperature, and the RH heating operation was unavoidable, the "pre- decarbonization and terminal decarbonization" heating process should be adopted to reduce the influence of RH heating operation on the cleanliness of molten steel.
李应江. 300 t RH炉化学升温工艺对IF钢洁净度的影响[J]. 中国冶金, 2018, 28(12): 24-30.
LI Ying- jiang. Effect of chemical heating process of 300 t RH furnace on IF steel cleanliness[J]. China Metallurgy, 2018, 28(12): 24-30.