Title

Selection and Evaluation of Blends for Cokemaking

Selection and Evaluation of Blends for Cokemaking

Authorship

Sakawa, Mitsuhiro; Yamaguchi, Takuji; Sakurai, Yoshihisa; Okuhara, Toshiaki

Sakawa, Mitsuhiro

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Yamaguchi, Takuji

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Sakurai, Yoshihisa

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Okuhara, Toshiaki

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DOI

10.5151/1TH-MEETING-COAL-1987-1987045

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Abstract

For the manufacture of good quality metallurgical coke, it is necessary, in the first place, to select coals that have suitable properties. For this reason, the procedure for correctly evaluating the properties of coking coals naturally plays the most important role among the cokemaking techniques. Particularly in Japan, there are few resources of good quality coking coals; hence, it has been an important mission for those concerned to select coals for importing from abroad that are suitable for coke making and to use them effectively. It is desired that coals for the making of metallurgical coke have as low ash and sulfur contents as possible, but it is even more important for them to have good coking properties necessary for forming lump coke of excellent strength. As for the strength of coke, the drum strength measured at room temperature was taken as a target formerly, but recently, as the behavior of coke in the blast furnace comes to light, the strength of coke after its reaction with CO2 has become a necessary item.

For the manufacture of good quality metallurgical coke, it is necessary, in the first place, to select coals that have suitable properties. For this reason, the procedure for correctly evaluating the properties of coking coals naturally plays the most important role among the cokemaking techniques. Particularly in Japan, there are few resources of good quality coking coals; hence, it has been an important mission for those concerned to select coals for importing from abroad that are suitable for coke making and to use them effectively. It is desired that coals for the making of metallurgical coke have as low ash and sulfur contents as possible, but it is even more important for them to have good coking properties necessary for forming lump coke of excellent strength. As for the strength of coke, the drum strength measured at room temperature was taken as a target formerly, but recently, as the behavior of coke in the blast furnace comes to light, the strength of coke after its reaction with CO2 has become a necessary item.

Keywords

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