公开(公告)号：JP4681456B2

公开(公告)日：2011-05-11

申请号：JP2006000392

申请日：2006-01-05

Applicant: 黒崎播磨株式会社

Inventor： 利之 保木井 ,  章二 吉田 ,  聡 坪井 ,  英一郎 波多江 ,  博之 淵本

IPC: C04B35/043 ,  B22D41/02 ,  C04B35/66 ,  F27D1/00

Abstract: PROBLEM TO BE SOLVED: To impart a strength and spalling resistance equivalent to a magnesia carbon brick containing a comparatively large amount of graphite, to a low carbon magnesia-containing fire-resistant unburned brick containing chromium, while preventing occurrence of a carbon pickup and maintaining superior corrosion resistance. SOLUTION: The low carbonaceous magnesia carbon brick is obtained by adding an organic binder to a fire-resistant raw material mixture consisting of 90-99 mass% of a magnesia-based raw material, 0.5-5 mass% of a flake graphite, and 0.3-10 mass% of metal chromium and/or a chromium alloy; kneading; molding and heat-treating; and its fixed carbon content is 0.5-7 mass%. The magnesia-based raw material in the fire-resistant raw material mixture of this low carbon magnesia carbon brick is occupied by particles having particle sizes from larger than 10 μm to 500 μm by 20-50 mass%, and the amount of particles having a particle size of 10 μm or smaller is 5 mass% of the fire-resistant raw material mixture. COPYRIGHT: (C)2007,JPO&INPIT