Castable refractory systems
AssigneeAlcan International Limited
InventorsFarid Azizian, Kevin John Wills
Life of this patent
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Abstract
A composition suitable for admixture with refractory grains to make a refractory monolithic formulation, consisting essentially of: 2 to 10 parts by weight of activated alumina; 0.25 to 1.0 parts by weight of an additive material which comprises at least one of an alumino-silicate-phosphate compound; a resin derived from an aldehyde and either an amine or an aromatic hydroxy compound; cellulose; polyethylene glycol(s); and methoxy polyethylene glycols; 0 to 50 parts by weight of fine alumina; 0 to 10 parts by weight of fine silica; 0 to 1 parts by weight of a dispersant; and 0 to 1 part by weight calcium aluminate cement.
Claims20
A composition suitable for admixture with refractory grains to make a refractory monolithic formulation, consisting essentially of:
- 2 to 10 parts by weight of activated alumina;
- 0.25 to 1.0 parts by weight of an additive material which is selected from the group consisting of an alumino-silicate-phosphate compound;
- a resin derived from an aldehyde and either an amine or an aromatic hydroxy compound;
- cellulose;
- polyethylene glycol(s);
- methoxy polyethylene glycols and mixtures thereof;
- 0 to 50 parts by weight of fine alumina;
- 0 to 10 parts by weight of fine silica;
- 0 to 1 parts by weight of a dispersant;
- and
- 0 to 1 part by weight calcium aluminate cement.
A refractory monolithic formulation, consisting essentially of:
- up to 97.75 weight percent inert refractory grains of graded size;
- and
- the remainder being a composition consisting essentially of
- 2 to 10 parts by weight of activated alumina;
- 0.25 to 1.0 parts by weight of an additive material which provides low temperature binding of the formulation but does not inhibit rehydration of the activated alumina in the presence of water;
- 0 to 50 parts by weight fine alumina;
- 0 to 10 parts by weight of fine silica;
- 0 to 1 parts by weight of a dispersant;
- and
- no more than 1 part by weight calcium aluminate cement.
Dependencies are inferred from the claim text.