Method for producing silica brick
AssigneeShinagawa Refractories Co., Ltd.
InventorsKenji Ichikawa, Hisayuki Harako, Teiichi Fujiwara, Masashi Taniguchi
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Abstract
A method for producing silica brick comprising firing a siliceous stone material containing silica as a main component is disclosed, in which 0.05 to 0.25% by weight of Na.sub.2 O--CaO--SiO.sub.2 fused and solidified material and 0.1 to 1.0% by weight, in terms of Fe.sub.2 O.sub.3, of iron oxide are added to the siliceous stone material, before firing. Transformation of silica into tridymite is effectively accelerated to provide silica bricks mainly comprising tridymite with reduced contents of residual silica and amorphous glass and exhibiting improved creep resistance.
Claims4
A method for producing silica brick comprising firing a siliceous stone material containing silica as a main component, wherein from 0.05 to 0.25% by weight of Na.sub.2 O--CaO--SiO.sub.2 fused and solidified material and from 0.1 to 1.0% by weight, in terms of Fe.sub.2 O.sub.3, of iron oxide, based on the siliceous stone material are added to the siliceous stone material, before firing.
Dependencies are inferred from the claim text.