Study on Relationship between Physicochemical Structure and Combustion Characteristics of Solid Fuels Injected into BF
The technology of injecting pulverized coal into a blast furnace (BF) is the main technical measure to reduce cost and increase efficiency in modern iron and steel enterprises,while the combustion characteristics of solid fuels for injecting into a BF is the key element in improving the replacement ratio of coals and cokes. In order to clarify the key factors affecting the combustion characteristics of solid fuels injected into BF,the relationship between the physicochemical structure of different solid fuels and their combustion characteristics were systematically analyzed. The analytical results showed that the ordering degree of carbon structures in solid fuels injected into BF had a significant effect on their combustion characteristics. The samples with higher ordering degree needed higher energy to destroy the structure of aromatic ring in the combustion reaction process,resulting in higher ignition temperatures and lower combustion rates. In the process of selecting and using pulverized coals or fuels for injection into a BF by the technology of injecting pulverized coal into a BF,solid fuels with higher content of fixed carbon,higher calorific values,developed pore structures,rich organic functional groups and low degrees of carbon structures with higher ordering degrees were selected for injecting fuels into BF,which could effectively improve the combustion state of mixed pulverized coals before coming into tuyeres and improve the utilization rates of pulverized coals injected into BF.
万方数据
维普
