To meet severer working conditions of heating
furnaces, mullite based castables are updated by adopting high purity binding
system to improve refractoriness under load. They have brought about reduced
deformation during long-term service at high temperature higher loading ability
and longer service life. They have been adopted in many heating furnaces of
Shoudu I & S Co., Wuhan I & S Co., Tangshan Guofeng I & S Co.,
Jiangyin Xingcheng Special Steel Co., etc. They have also been adopted in magnesium
reduction furnace, with greatly improved service life, 5~8 times that of the previous
brick linings.