Carbonization of coals into anisotropic cokes: 6. Formed cokes of high density and optical anisotropy from non-fusible and slightly fusible coals |
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Authors: | Isao Mochida Akira Shiraki Yozo Korai Toshiaki Okuhara |
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Affiliation: | 1. Research Institute of Industrial Science, Department of Molecular Engineering, Graduate School of Engineering Sciences, Kyushu University 86, Kasuga, Fukuoka, 816 Japan;1. Research and Development Laboratories-Ill Nippon Steel Corp., Yawata-Higashi, Kitakyushu, 805 Japan |
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Abstract: | A procedure for the preparation of solid formed coke of enough adhesion and anisotropic development for use in the blast furnace has been studied, using non-fusible and slightly fusible coals with petroleum cocarbonizing additives. The coke precursor was prepared through the copreheat-treatment of coal and a suitable additive in adequate quantity under stipulated conditions. The desired coke was produced by carbonization after forming with a press. The conditions for the copreheat-treatment have been carefully examined in terms of the temperature, time and heating devices. The behaviour of coals during copreheat-treatment and carbonization were discussed in terms of coal ranks, comparing this behaviour to the liquefaction reactivity and thermal stability of their liquefied product. |
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Keywords: | coal formed coke cocarbonization anisotropic development |
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