Nippon Kokan Kabushiki Kaisha

Yasuo Okuyama

Gyoichi Suzuki

Mitsutoshi Miura

Takashi Miyazu

Hiroaki Nishio

Takashi Mori

Kazuo Kunioka

Sanseki Moriguchi

Taro Matsushita

Teruo Shimotsuma

Masahiro Muroya

Mamoru Yanagiuchi

A method for recovering and utilizing heat of coke-oven gas, which comprises: through heat exchange with a high-temperature coke-oven gas generated from a coke oven battery and containing vaporized coal tar, vaporized low boiling point substances and dust, drying and preheating a blended raw material coal fine to be charged into coking ovens of said coke oven battery, and, on the other hand, causing most of said coal tar contained in said coke-oven gas to condense and deposit onto the particle surfaces of said coal fine during the process of said heat exchange, thereby recovering and utilizing sensible heat and condensation heat of said coke-oven gas and substances contained therein, and at the same time, eliminating most of the contained coal tar from said coke-oven gas.

Method for recovering and utilizing heat of coke-oven gas

A plurality of different types of raw material coal fines are sieved to a size not exceeding 1.5 mm; said sieved raw material coal fines are blended so as to satisfy the following conditions:

Method for manufacturing high-strength formed coke in slight mutual

With the use of low-fluidity blended raw material coal fines having a maximum fluidity of up to 20 d.d.p.m. as an inner core material, and coal fines having a maximum fluidity of at least 30 d.d.p.m. or a bituminous material having a C/H ratio of from 0.7 to 1.9 as an outer envelope material, green composite briquettes are formed by covering said inner core material with said outer envelope material. Said green composite briquettes thus formed are charged into a conventional coke oven battery and carbonized by an ordinary process, whereby a high-strength metallurgical formed coke in a slight mutual agglomeration is produced.

Method for producing metallurgical coke

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Yokohama, Japan

Yasuo Okuyama