09-08-2012 дата публикации
Номер: WO2012105102A1
Автор:
HIGUCHI, Takayuki,
TOMIOKA, Shigeru,
WATANABE, Akira,
YAMAMOTO, Kenji,
MORIOKA, Minoru,
SHOJI, Makoto
Принадлежит:
A process for producing β-2CaO·SiO2, comprising: selecting a raw material which comprises CaO and SiO2 as the main components and has a CaO/SiO2 molar ratio of 1.8 to 2.2 and which, after being heated at 1000°C, exhibits a total content of Al2O3 and Fe2O3 of less than 5 mass%, and a total content of boron, phosphorus, barium, strontium and molybdenum of less than 0.5 mass% in terms of oxides; preparing, from the raw material, a mixture wherein the ratio of particles passing through a screen having 150-μm openings is 90 mass% or higher; granulating the mixture; and firing the granulated mixture at a firing temperature of 1350 to 1600°C in a rotary kiln in which brick or mortar is used on the inside surface of the firing zone. The brick or mortar is at least one selected from the group consisting of silica-alumina bricks comprising 45 to 80 mass% of Al2O3 and 20 to 55 mass% of SiO2, silica-alumina mortars comprising 25 to 80 mass% of Al2O3 and 20 to 75 mass% of SiO2, magnesia bricks comprising ...
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