Abstract: The adsorption capacity of converter slag for pure CO2 and CO2 in simulated blast furnace gas was detected by PCA-2200 chemical adsorption analyzer. Regardless of the influence of other gases in the blast furnace gas,the simulated blast furnace gas was consisted of 19.89% (volume fraction) CO2, 25.00 % CO, and 55.11% N2. The results show that the temperature has a notable effect on the CO2 adsorption reaction of converter slag. Increasing temperature improves the adsorption capacity of converter slag for CO2. At 400 ℃,the amount of CO2 adsorbed by converter slag per kilogram of pure CO2 and simulated blast furnace gas is 3.448 g and 5.575 g, respectively. However, when the reaction temperature rises to 500 ℃ and 550 ℃, the adsorption capacity of converter slag for pure CO2 is higher than that for CO2 in simulated blast furnace gas. At 550 ℃, the uptake for pure CO2 and CO2 in simulated blast furnace gas by the per kilogram converter slag reached the highest, which are 9.339 g and 7.062 g, respectively.

Key words: converter slag, pure CO2, simulated blast furnace gas, CO2 adsorption