1968 Volume 54 Issue 14 Pages 1427-1431
The gasification of coke by carbon dioxide or steam is one of the important reactions which take place in the blast furnace. But the rate equation, which may be applied to such an atmosphere of CO2-H2O-O-H2-N2-mixture as in the blast furnace, has not been reported yet. In order to determine the rate equation applicable to such gas mixtures, the gasification rates of pulverized metallurgical coke (24-35 mesh) by CO2-N2, CO2-CO, H2O-N2and H2O-H2systems were measured between 1000 and 1100°C. The experimental results led to the following expression,
(Rate of gasification)=k1pCO2+k4pH2O/l+k2pCO2+k3pCO+k5pH2O
where PCO2, PH2O and Pco were the partial pressures of CO2, H2O and CO respectively, and the constants were functions of temperature.
Some workers have reported the retardation of gasification reaction by CO and H2, but hydrogen did not retard the reaction under our experimental conditions. The above equation may be available for the mathematical simulation of the blast furnace.