Effect of CRI and CSR on the softening-melting behavior of burden in the high temperature zone

The influence of coke properties on the softening and melting behavior of burden was investigated through high temperature reaction tests. The results indicated that with an increase in the CRI of coke, the ΔT_10% and ΔT_40% both decreased while the ΔT₁ increased. The higher CRI got, the lower T_s was. In other words, under the identical primary slag condition, the resistance of cohesive zone for gas would increase with the increasing of CRI, as a result, the ΔP_max and S both rose. Because the S increased with increasing of coke which was less than 5 mm, it is necessary for the improvement of permeability to increase the CSR of coke. Notably, the CRI and CSR could reflect the quality of coke at high temperature, consequently, they still can be used as the quality indices of coke in the cohesive zone. (authors)