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Title:
PRECAST BLOCK FOR GUTTER FOR MOLTEN STEEL TAPPING FROM ELECTRIC FURNACE
Document Type and Number:
Japanese Patent JPH09255409
Kind Code:
A
Abstract:

To obtain the subject precast block incorporated with a specified amount of specific sintered compact clinker having a specific granular size as aggregate to improve both the spalling resistance and abration resistance of the block.

This precast block contains 10-50wt.% of magnesia-chromium sintered compact clinker as aggregate 20-100mm in granular size consisting mainly of MgO and Cr2O3 and containing Al2O3, Fe2O3, etc., as the rest. The clinker is obtained by mixing magnesia clinker, natural chromium ore, fused magnesia-chromium sintered compact clinker etc., together followed by firing and then regulating the product to a specified granular size. The magnesia- chromium sintered compact clinker comprises 50-70wt.% MgO and 15-25wt.% Cr2O3 as the basic domain and contains ≤25wt.% of the rest. The matrix of this block is e.g. a castable of high-alumina cement type, magnesia-based substance.


Inventors:
Kawamoto, Eiji
Chihara, Kenji
Iwamoto, Takashi
Yamada, Iwao
Application Number:
JP1996000097697
Publication Date:
September 30, 1997
Filing Date:
March 26, 1996
Export Citation:
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Assignee:
TOKYO YOGYO CO LTD
International Classes:
B22D35/00; C04B35/00; C04B35/047; F27B3/19; F27D3/14; (IPC1-7): C04B35/00; B22D35/00; C04B35/047; F27B3/19; F27D3/14
Attorney, Agent or Firm:
大矢 須和夫