Kobe Steel, Ltd.

Takahiro Shimizu

Takuo Shigehisa

Seiichi Yamamoto

Satoru Sugita

Shigeru Kinoshita

Yoichi Takahashi

Hiroki Watanabe

Yutaka Mitou

Atsushi Furuya

Toru Higuchi

A process for producing a modified coal from a coal of low-rank as a raw material includes dehydrating the coal, adding water to the dehydrated coal, agglomerating the water-added coal, and gradually oxidizing the agglomerated coal. In the water addition, an added amount of the water is regulated so that the water-added coal has a water content of 5% by mass or more and 20% by mass or less. In the oxidation, the agglomerated coal is held in an air at a temperature of 70&#xb0; C. or more and 105&#xb0; C. or less.

Method of producing modified coal, and modified coal

Provided is a manufacturing method for a briquetted solid fuel that can reduce the briquetting cost while maintaining the strength of the briquetted product. A mixed oil that includes a heavy oil and a solvent oil, and a porous coal are mixed to obtain a slurry. The slurry is dewatered by heating to obtain a dewatered slurry. Solvent oil is separated from the dewatered slurry to obtain a cake, the cake is heated, and solvent oil is further separated from the cake to obtain a modified coal. Moisture is added to the modified coal to obtain a moist modified coal with a moisture content of 3 wt % to 10 wt %, and then the moist modified coal is briquetted under pressure.

Method for manufacturing briquetted solid fuel using porous coal as starting material

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Hyogo, Japan

Takahiro Shimizu