Refractory compositions suitable for preparing low water-content injectable pastes
AssigneeSociete Europeenne des Produits Refractaires
InventorsJean-Pierre Kiehl, Bernard A. Clavaud
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Abstract
The invention relates to produced refractory compositions comprising the four following particulate fractions: (1) 30-60% by weight of a coarse fraction at least 50% of which are greater than 0.5 mm; (2) 10-30% by weight of a fine fraction at least 50% of which are smaller than 75 microns; (3) 10-30% by weight of a very fine fraction at least 50% of which are smaller than 5 microns; and (4) 10-30% by weight of an ultra fine fraction at least 80% of which are smaller than 0.1 micron; the fractions being comprised of materials which are inert to water. The refractory compositions, when mixed with less than 10% by weight of water, give injectable pastes suitable for repairing refractory furnace linings.
Claims9
Refractory compositions suitable for preparing injectable pastes, which comprise the following essential constituents:
- (1) 30 to 60% by weight of a coarse fraction comprised of grains at least 50% of which have a particle size greater than 0.5 mm, the greatest grains being not greater in size than 10 mm, said course fraction being comprised of natural or synthetic inorganic materials which are inert to water;
- (2) 10 to 30% by weight of a fine fraction comprised of particles at least 50% of which have a particle size smaller than 75 microns, the finest particles being not smaller in size than 10 micron, said fine fraction being comprised of natural or synthetic inorganic materials which are inert to water;
- (3) 10 to 30% by weight of a very fine fraction comprised of particles at least 50% of which have a particle size smaller than 5 microns, the finest particles being not smaller in size than 0.1 micron, said very fine fraction being comprised of natural or synthetic inorganic materials which are inert to water;
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- (4) 10 to 30% by weight of an ultra fine fraction comprised of particles at least 80% of which have a particle size smaller than 0.1 micron, the finest particles being not smaller in size than 0.1 micron, said ultra fine particles being selected from the group consisting of silica, chromium oxide Cr.sub.2 O.sub.3, titanium dioxide, zirconia, silicon carbides, silicon nitrides and silicon oxinitrides which are inert to water.
Dependencies are inferred from the claim text.