To provide carbon-containing basic brick having durability improved by reducing the loss due to oxidation/abrasion.
The carbon-containing basic brick is obtained from a blended material prepared by adding 0.5-5 mass % Al-Mg alloy, or 0.1-5 mass% Al and 0.5-5 mass% Al-Mg alloy, and 0.012-2 mass% boron-containing raw material such as magnesium borate, in external multiplication, into a mixture consisting essentially of a magnesia raw material and a carbon raw material. The carbon-containing basic brick has ≥5 MPa bending strength at room temperature after reduction firing at 1,400°C for 3 hr and the ratio S1,550/S1,400 of the bending strength S1,550 at room temperature after reduction firing at 1,550°C for 3 hr °C to the bending strength S1,400 at room temperature after reduction firing at 1,400°C for 3 hr is 0.6-1.4.
COPYRIGHT: (C)2004,JPO
Satoshi Tsuboi
Koji Kono
Itakusu Motokuni
Kyushu Fire Brick Co., Ltd.
Nippon Steel Corporation
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Takato Tsutsumi