コークスの燃焼粉化性試験法の開発(<特集>製銑)

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A new test method for the evaluation of disintegration property of coke during the progress of gasification has been developed in order to simulate the state of coke at the raceway in blast furnace. This method uses a spouted bed reactor into which heated CO_2 gas or perfect combustion gas containing CO_2 and H_2O is injected at the flow rate enough for fluidizing the specimen coke particles. The cokes which are shot into the reactor react with CO_2 or H_2O, and thereby the strength deterioration progresses at their surfaces. The fine coke particles are generated by the impact or abrasion of fluidizing particles and carried over to the outside by the stream of gas. The fine cokes are collected by a cyclone and the total mass of them is measured continuously. The curve of showing the amount of fine coke collected against reaction time represents the disintegration property of coke and this seems to be well corresponded to the burning character of coke in the raceway. The two indexes are defined to indicate the test result. One is mean disintegration rate and the other is fine coke ratio. The former shows good correlation to the reactivity of coke matrix with CO_2 and this is well corresponded also to the test value of CSR (coke strength after reaction in a small scale reactor). The latter is correlated to the minimum gasification degree where disintegration of coke surface starts under a certain condition and that seems to be related to the macro-structure of coke.
社団法人日本鉄鋼協会の論文
1980-11-01

コークスの燃焼粉化性試験法の開発(<特集>製銑)

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