Determination of the cooling gas composition effect on the coke quality parameters during a coke dry quenching

The purpose of the study is to establish the quantitative influence of the composition of the cooling gas on the main qualitative indicators of coke during its dry quenching, in particular on CRI (Coke Reactivity Index) and CSR (Coke Strength after Reaction). The research methodology included laboratory modeling of the coke dry quenching process using laboratory equipment (coking oven, special laboratory dry quenching system, etc.). The main results showed that an increase in CO content in the cooling gas (from 0 to 9.6%) with a decrease in CO₂ (from 17.43 to 9.43%) is accompanied by a decrease in CRI_с from 46.2% to 42.0% and an increase in CSR_с from 31.7% to 42.8%. At the same time, a slight decrease in coke weight loss was observed, which indicates a decrease in carbon gasification. The practical value of the work lies in the possibility of optimizing the composition of the circulating gas in industrial coke dry quenching systems in order to improve the quality of coke and reduce its losses.