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Title:
HEARTH FOR MOVING FLOOR FURNACE
Document Type and Number:
WIPO Patent Application WO/2003/018849
Kind Code:
A1
Abstract:
A hearth for moving floor furnace having an excellent heat resistance, using inexpensive material, and used for a moving floor furnace for manufacturing reduced iron bulk material by heating and reducing iron oxide bulk material containing coal material on a moving floor moving in the furnace, characterized in that refractory waste containing magnesium oxide is laid down on the upper surface of the hearth, wherein the content of the magnesium oxide in the refractory waste should desirably be 30 w.% or more, and a heat resistant layer formed of the iron oxide bulk material is formed on the upper surface of the refractory waste.

Inventors:
Ichikawa, Hiroshi (C/O NIPPON STEEL CORPORATION, Engineering Divisions Group 46-59, Oaza Nakabaru, Tobata-k, Kitakyushu-shi Fukuoka, 804-0002, JP)
Shima, Shinji (C/O NIPPON STEEL CORPORATION, Engineering Divisions Group 46-59, Oaza Nakabaru, Tobata-k, Kitakyushu-shi Fukuoka, 804-0002, JP)
Shibata, Tomoaki (C/O NIPPON STEEL CORPORATION, Engineering Divisions Group 46-59, Oaza Nakabaru, Tobata-k, Kitakyushu-shi Fukuoka, 804-0002, JP)
Application Number:
PCT/JP2002/008754
Publication Date:
March 06, 2003
Filing Date:
August 29, 2002
Export Citation:
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Assignee:
NIPPON STEEL CORPORATION (6-3 Otemachi 2-chome, Chiyoda-ku, Tokyo, 100-8071, JP)
Ichikawa, Hiroshi (C/O NIPPON STEEL CORPORATION, Engineering Divisions Group 46-59, Oaza Nakabaru, Tobata-k, Kitakyushu-shi Fukuoka, 804-0002, JP)
Shima, Shinji (C/O NIPPON STEEL CORPORATION, Engineering Divisions Group 46-59, Oaza Nakabaru, Tobata-k, Kitakyushu-shi Fukuoka, 804-0002, JP)
Shibata, Tomoaki (C/O NIPPON STEEL CORPORATION, Engineering Divisions Group 46-59, Oaza Nakabaru, Tobata-k, Kitakyushu-shi Fukuoka, 804-0002, JP)
International Classes:
C21B13/10; F27B9/16; F27B9/30; F27D1/00; (IPC1-7): C21B13/10
Foreign References:
US6254665B1
US20010032527A1
JPS5247017A
JPH11304369A
JPH10203862A
JPS5130214A
US4597564A
Attorney, Agent or Firm:
Ishida, Takashi (A. AOKI, ISHIDA & ASSOCIATES Toranomon 37 Mori Bldg., 5-1, Toranomon 3-chom, Minato-ku Tokyo, 105-8423, JP)
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