To provide the production of the flame-retardant carbon low in powdering phenomenon, relatively high in hardness of each particle and nearly uniform in particle size.
A porous inorg. matter having a particle size of order of 3-5 mm is used as a center core material, and an org. material to be carbonized which is much finer than the center core material, an inorg. binder of a fine pulverous mineral clay and the center core material are mixed. Water is added to the mixture and the mixture is agitated to form a granular body in which the center core material becomes a center core caused by a difference of particle size by the agitation function. A surface layer of the mixture of the material to be carbonized an the inorg. binder is formed around the center core, and the granular body is burned.
KAYAMA HIROSHI
AKAIKE SENSUKE
KOTODA TAKASHI
SHIMOI MASAO
KASAN RYOKKA SANGYO KK
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