Phenolic coated refractory aggregates
AssigneeBorden Chemical, Inc.
InventorsAvis Lloyd McCrary, Jimmy Pingao Chen, Pitchaiya Chandramouli
Life of this patent
Estimating the term…
Abstract
A method for forming resin coated refractory aggregates and the resulting resin coated aggregates which can be used for forming refractory shapes such as furnace linings, bricks, etc. The process includes contacting a heated refractory material in particulate form with a resin or resin solution which is then shaped or projected or otherwise compacted, exhibiting high green strength when cold pressed. Substantially reduced organic emissions are the result.
Claims21
A resin coated refractory aggregate formed by the process of:
- (A) preheating a refractory aggregate selected from the group consisting of magnesia, doloma, graphite, carbon, silicon carbide and combinations thereof to a temperature above the softening point of a resin to be added to the refractory aggregates;
- (B) adding a resin to the heated refractory aggregate of step (A);
- (C) mixing the resin and heated refractory aggregate under conditions so as to coat the refractory aggregate with resin;
- and
- (D) recovering a free-flowing resin coated refractory aggregate.
A process of forming refractory shapes from refractory aggregate comprising:
- (A) preheating a refractory aggregate to a temperature above the softening point of a resin to be added to the aggregate;
- (B) contacting a resin with the heated aggregate of step (A);
- (C) mixing the resin and heated aggregate under conditions so as to coat the aggregate with resin;
- and
- (D) forming the coated aggregate into a refractory shape.
A process of forming refractory shapes from refractory aggregate comprising:
- (A) preheating a refractory aggregate to a temperature sufficient to convert a thermosetting resin to a B-stage cure;
- (B) contacting a resin comprising a resole resin with the heated aggregate of step (A);
- (C) mixing the resin and heated aggregate under conditions so as to coat the aggregate with resin;
- and
- (D) forming the coated aggregate into a refractory shape.
Dependencies are inferred from the claim text.