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:
Apr. 05, 2005
Filed:
Oct. 19, 2000
Koji Hanaoka, Okayama, JP;
Seiji Sakamoto, Okayama, JP;
Katsutoshi Igawa, Okayama, JP;
Yutaka Yamauchi, Okayama, JP;
Shizuki Kasaoka, Okayama, JP;
Toshiro Sawada, Okayama, JP;
Koichi Shinohara, Okayama, JP;
Yuji Tsukihara, Okayama, JP;
Shinjiro Baba, Okayama, JP;
Koji Hanaoka, Okayama, JP;
Seiji Sakamoto, Okayama, JP;
Katsutoshi Igawa, Okayama, JP;
Yutaka Yamauchi, Okayama, JP;
Shizuki Kasaoka, Okayama, JP;
Toshiro Sawada, Okayama, JP;
Koichi Shinohara, Okayama, JP;
Yuji Tsukihara, Okayama, JP;
Shinjiro Baba, Okayama, JP;
JFE Steel Corporation, , JP;
Abstract
Related to a blast furnace coke and a production method thereof. A coke having high reactivity and high strength in which coke strength, reactivity with COand a pore size distribution are each at a desired level can be produced at a low cost by using a coal blend composed of a small number of brands comprising a large quantity of caking coal having medium rank and low fluidity. The blast furnace coke, being obtained by charging a coal blend comprising 60 wt % or more of semi-heavy caking coal having medium rank and low fluidity in which a content of inert component is 30 vol % or more in total or another coal blend comprising 60 wt % to 95 wt % of semi-heavy caking coal having medium rank and low fluidity in which mean reflectance (Ro) is 0.9 to 1.1 and maximum fluidity (MF) is less than 3.0 and the balance being a caking coal in which mean reflectance (Ro) exceeds 1.1 into a coke oven and coking the coal blend, which has a pore size distribution where a content ratio of pores having a diameter of less than 10 μm is from 12 vol % to 15 vol % and a content ratio of pores having a diameter of from 10 μm to 100 μm is from 10 vol % to 15 vol % and the production method thereof.