Dissolution Reaction of Earthy Graphite in Liquid Steel
Earthy graphite is an abundant natural resource with a high content of fixed carbon. It can be considered as a carbon source for steel carburizers. Also, it can reduce the production cost of enterprises. The study is aimed to clarify the kinetics of dissolution reaction and the carbon increase effect. The experiments were carried out by quartz tube sampling at 1873 K, with 0.1 and 0.4% theoretical carbon increase. Effect of added amount on S, N and O content in steel was studied. The results indicated that carbon increase effect was equivalent to some company carbon additives. The added amount of earthy graphite has little influence on S, N and O content. Considering the carbon oxidation reaction consumption during carbon dissolution process, a dynamic model was obtained and the reaction rate constant of the carbon dissolution reaction was calculated.
KeywordsEarthy graphite Dissolution Kinetics Liquid steel
This work was supported by the National Natural Science Foundation of China (No. 51334001, No. 51804126, No. 51474019), Natural Science Foundation of Hebei Province (No. E2018209266) and Natural Science Foundation of Tangshan city (No. 17110208a).
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