The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 12, 2010
Filed:
Sep. 10, 2004
Kenji Kato, Futtsu, JP;
Yukihiro Kubota, Futtsu, JP;
Takashi Arima, Futtsu, JP;
Masaki Sasaki, Tokai, JP;
Makoto Matsuura, Tokai, JP;
Hiroki Nakai, Tokai, JP;
Kenji Kato, Futtsu, JP;
Yukihiro Kubota, Futtsu, JP;
Takashi Arima, Futtsu, JP;
Masaki Sasaki, Tokai, JP;
Makoto Matsuura, Tokai, JP;
Hiroki Nakai, Tokai, JP;
The Japan Iron and Steel Federation, Tokyo, JP;
Abstract
Methods for pretreating and improving coking coal quality for producing blast-furnace coke by: (a) rapid-heating the coal charge in a fluidized-bed to a temperature range between not lower than 300° C. and not higher than the temperature at which the coal charge begins to soften, at a rate of 30 to 10° C./min., (b) classifying the rapid-heated coal charge to fine- and coarse-size coal, and then (c-1) briquetting the fine-size coal or (c-2) rapid-heating the fine- and coarse-size coal individually in a pneumatic preheater to a temperature range between not lower than 300° C. and not higher than the temperature at which the coal charge begins to soften, at a rate of 10to 10° C./min., and (d) forming the fine-size coal.