SILICA-BASED CASTABLE REFRACTORY AND SILICA-BASED PRECAST BLOCK REFRACTORY

PROBLEM TO BE SOLVED: To provide a silica-based castable refractory which has excellent thermal shock resistance during heating, suppresses shrinkage under load at high temperatures, exhibits good creep resistance at high temperatures, and hardens within a proper time.SOLUTION: A silica-based castab...

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Bibliographic Details
Main Authors NISHIJIMA KOJI, TAKENAMI JUNYA, ISHIHARA JUN, ENDO YOSHIYASU
Format Patent
LanguageEnglish
Published 26.09.2013
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Summary:PROBLEM TO BE SOLVED: To provide a silica-based castable refractory which has excellent thermal shock resistance during heating, suppresses shrinkage under load at high temperatures, exhibits good creep resistance at high temperatures, and hardens within a proper time.SOLUTION: A silica-based castable refractory is obtained by adding, to 100 mass% of a silica-based refractory raw material mixture comprising fused quartz and fired silica stone, 3.0-9.3 mass% (expressed in terms of solid SiO) of colloidal silica and 0.04-0.30 mass% (expressed in terms of solid NaO) of sodium silicate. The fired silica stone consists mainly of tridymite, blending percentages of fused quartz and fired silica stone are 40-100 mass% of fused quartz and 0-60 mass% of fired silica stone, and a total addition amount of sodium components is 0.06-0.32 mass% (expressed in terms of solid NaO) externally relative to 100 mass% of the composition. The fired silica stone may consist mainly of tridymite and cristobalite. In this case, blending percentages of fused quartz and fired silica stone are set to 60-100 mass% of fused quartz and 0-40 mass% of fired silica.
Bibliography:Application Number: JP20120035847