Taiheiyo Cement Corporation

Masafumi Nakazaki

Osamu Yamaguchi

Junichi Terasaki

Yasuhiro Uchiyama

Kouji Kondou

Harutoshi Kidachi

An exhaust gas treatment method including: (A) a step of treating exhaust gas from cement manufacturing equipment by using a dust collectorto collect dust containing chlorinated organic compounds, and discharging the exhaust gas after the treatment by the dust collector, and (B) a step of charging all or part of the dust collected by the dust collectorinto a place (e.g. a rotary kiln, a pre-calciner, and a cyclone) having a temperature of at least 800&#xb0; C. inside the cement manufacturing equipment. The remainder of the dust from step (B) maybe charged into a place (e.g. a raw material supply passage) having a temperature below 800&#xb0; C. inside the cement manufacturing equipment, provided the amount of the remainder to be charged is smaller than a certain amount. Chlorinated organic compounds such as dioxins in the exhaust gas can be decomposed efficiently to be made harmless, merely by including simple and low-cost means (e.g. a dust feeding means, etc.).

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Tokyo, Japan

Masafumi Nakazaki