New Process for Resource Utilization of Converter Gas and Simulation on the Combustion of Converter Gas

摘要

A new process for resource utilization of converter gas is proposed to produce CO_(2) at a lower cost in this paper. Converter gas is burned in O_(2)–CO_(2) atmosphere instead of O_(2)–N_(2) atmosphere in a closed combustion furnace. Flue gas with high concentration of CO_(2) can be used as low-grade CO_(2) directly or be purified as raw gas for preparing high-purity CO_(2). Both the low-grade CO_(2) and high-purity CO_(2) can be recycled for the converter blowing and sealing. In order to analyze the combustion characteristics of converter gas, numerical simulations based on a three dimensional combustion furnace model were carried out. Volume fraction of N_(2) in combustion flue gas dropped from 63.37% to 3.92%, meanwhile CO_(2) concentration in flue gas reached 95.08% when the N_(2) in air was totally replaced by CO_(2). In addition, to control the CO content in flue gas within the safety criterion, lower stoichiometry is an optimal solution for the converter gas compete combustion.