Microscopic study on the interior and exterior reactions of coke with CO2 and H2O

作者：Wang, P.; Yu, S.; Long, H.^*; Wei, R.; Meng, Q.; Zhang, Y.

来源：Ironmaking and Steelmaking, 2017, 44(8): 595-600.

DOI：10.1080/03019233.2016.1223792

• Coke
• CO2 and H2O
• Interior reaction
• Microscopic morphology

The interior and exterior reactions of coke with H2O and CO2 were studied at 950-1250 degrees C by self-made gas-solid reacting apparatus, including the particle diameter, apparent porosity, relative volume density distribution and pore structure of coke after reaction. It was obtained that the porcoke in the interior and exterior parts were all eroded after reacting with CO2 or H2O. However, compared with CO2, the reaction of coke with H2O occurred at the coke exterior more strongly, but in the coke interior occurred more weakly, indicating the reaction area of coke with H2O was much closer to the coke exterior. Therefore, injecting hydrogen fuel into blast furnace can increase the coke particle size, so as to make coke playing a better role as skeleton in blast furnace. In addition, increasing the temperature can reduce the amount of solution loss in the coke interior, in particular for the reaction with H2O.

• 出版日期2017
• 单位安徽工业大学