Abstract
It was tried to summarize recent informations on the behavior of coke in blast furnaces obtained mainly by dissective investigations of quenched furnaces. The general tendencier of the changes of size, strength, alkali content, reactivity, etc. of coke as it descends in the furnaces as well as their mutual relations were found. Special regard was paid to the role of the raceway and its vicinity where remarkable size-decrease or disintegration occurred. Some considerations were given to the causes of degradation in the furnace, putting emphasis on the solution loss or gasification reaction. A few informations on the behavior of formed coke involved discrepancies in themselves, which may be natural under the present situation.
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