Mitsui Engineering and Shipbuilding Company Limited

Hiroshi Kamei

Kazuya Yamada

Yasuaki Harada

Gentaro Takasuka

Mazumi Itaya

Tatuo Kato

Yoshimichi Hanai

Hiroshi Otake

Incineration flyash is treated by reducing the organic chlorine compounds contained in the flyash. A cylindrical body equipped with a rotating shaft having a screw conveyor and agitating blades for conveying and agitating the flyash is filled to at least a 75 vol % charge so that contact of the flyash with oxygen is made as small as possible. The flyash is subjected to agitation and heat-treatment at 300.degree. C. or higher. The cylindrical body has a feeding port for the waste incineration flyash and a discharging port for the discharge of the treated flyash. The screw conveyor is at the introducing part and has a pitch that is successively reduced toward the agitating part for charging the flyash in the agitating part at a greater vol. % than that which occurs in the introducing part.

Apparatus and process for treating waste incineration flyash

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Yokohama, Japan

Hiroshi Kamei