Influence factors of iron coke properties and discussion on use of iron coke in hydrogen-rich blast furnace
Iron coke is a new type of carbon and iron composite charge.Compared with the ordinary coke,it has high reactivity,can reduce the temperature in the heat reserve zone of blast furnace and promote the working efficiency.The properties of iron coke are affected by the types,proportions and technological parameters of raw materials.Due to the change of iron ore reduction and slagging process,it is necessary to accelerate the melting of primary slag and carburizing of metal iron for hydrogen-rich blast furnace smelting.The gasification reaction temperature of iron coke is low,which is conducive to the precipitation of carbon black and promote the carburizing of metal iron.Therefore,the application of iron coke instead of partial coke in the hydrogen-rich blast furnace smelting can exert the double advantages of energy saving and emission reduction with hydrogen and iron coke.The effect of prepara-tion factors on the properties of iron coke is systematically discussed,and the feasibility and advantages of the appli-cation of iron coke in the hydrogen-rich blast furnace are discussed.The results show that iron ore powder has a positive catalytic effect on the reactivity of iron coke.The structure of iron coke can be densified by adding a certain ratio of binder.The carbonization temperature will affect the metallization rate of iron coke.Appropriate carboniza-tion time can strengthen the compressive strength of iron coke and increase the strength after reaction.Part of iron coke is used instead of coke in the hydrogen-rich blast furnace,which can protect coke,accelerate the carburizing process of hot metal and improve the gas permeability of blast furnace as well as playing its highly reactive role.It is suggested to explore the reaction behavior and performance evolution of iron coke in the hydrogen-rich blast furnace.Combined with the performance requirements of the hydrogen-rich blast furnace and the factors affecting the prepa-ration of iron coke,the preparation technology of iron coke suitable for the hydrogen-rich blast furnace smelting is studied in order to promote the implementation of low carbon smelting technology of blast furnace.
iron cokelow carbon smeltinggasification reactioninfluence factorhydrogen-rich blast furnace
NETL
NSTL
万方数据
