Thermal strength requirement and testing method for blast furnace coke

The BF ironmaking process usually requires coke has low reactivity and higher strength after reaction,but it is unfavorable to improve efficiency of blast furnace reaction while coke has reactivity is too low.The consumption mechanism of coke in blast furnace was analyzed in this paper;the results show that the coke consumption in shaft directly related with the degree of direct reduction,and the consumption quantity is stable,so the existing evaluation method for coke thermal strength is inappropriate.In order to avoid coke overreacted,the evaluation method should be adjusted,such as change the atmosphere or determine testing time according to coke weight lost,thus the determination results would be reasonable and corresponded with facts of coke consumption in blast furnace.