| 초록 |
An experimental study was carried out to examine the effect of different blending ratio of semi-soft coking coal on coke characteristics, especially on coke reactivity and coke structural modifications after the boudouard reaction. Three different type of cokes were reacted with CO2 at the CSR test temperature of 1373 K. During the coke reactivity test evolution of CO was monitored and calculated the carbon conversion rate. Coke internal structual analysis was done with CT-scanning technique before and after the CO2 reactivity test. Carbon structure and mineralogy of cokes was measured using X-ray diffraction. Under the test conditions, high blending ratio of semi-soft coking coal showed high reactivity and strutural degradation progressed faster than low blending ratio of semi-soft coking coal. Low reactivity of cokes indicated high ordering of carbon structure and lesser amounts of reactive iron-bearing minerals. The study has implications on the efficient utilization of premium coal resources and for the reference of coke performance in a blast furnace. |
