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US 4,303,700 AGranted
Sprayable material for repairing base plates of ingot molds
AssigneeNalco Chemical Company
InventorsPaul G. Adams, Kenneth A. Gebler
Life of this patent
Estimating the term…
Abstract
The base plates or stools of ingot molds used in the casting and teeming of molten steel can be repaired by spraying onto the ingot mold base plate from 2-5 gallons of a composition comprising: ______________________________________ Aluminum silicate refractory grain.sup.1 50-80% Al.sub.2 O.sub.3 4.0-17.0% Bentonite clay 0.2-5.0% Binder 4.0-25% 75% phosphoric acid 72-82% Alumina trihydrate 6.2-16.2% Powdered boric acid 1.0-7.0% H.sub.2 O 4.0-14.0% Water 5-30% ______________________________________
Claims2
A process for repairing ingot mold stools which comprises:
- (1) forming a thixotropic, self-leveling stool repair material comprising:
- (a) 50-80% by weight powdered aluminum silicate, said silicate having the following particle size distribution:
- 10-25% not greater than 200 mesh
- 75-90% 15-30 mesh
- (b) 4-17% by weight powdered alumina of from 200-400 mesh
- (c) 0.2-5.0% bentonite clay of from 200-400 mesh
- (d) 4.0-25% of a binder having a composition comprising:
- 75% phosphoric acid--72-82%
- alumina trihydrate--6.2-16.2%
- powdered boric acid--1.0-7.0%;
- and
- water--4.0-14.0%
- (e) 5.0-30% water
- (2) pumping said stool repair material onto an ingot mold stool, said stool having been previously damaged by molten metal;
- (3) allowing said composition to cure, utilizing the residual heat contained in said ingot mold stool;
- and then,
- (4) recovering a repaired ingot mold stool having a strong, crack-free patch.
14 more elements
An ingot mold stool repair composition comprising:
- (1) 50-80% powdered aluminum silicate refractory grain having the following particle size distribution:
- 10-25% not greater than 200 mesh
- 75-90% 15-30 mesh
- (2) 4-17% by weight powdered alumina of from 200-400 mesh
- (3) 0.2-5.0% bentonite clay of from 200-400 mesh
- (4) 4.0-25% of a binder having a composition comprising:
- (a) 75% phosphoric acid--72-82%
- (b) alumina trihydrate--6.2-16.2%
- (c) powdered boric acid--1.0-7.0%;
- and,
- (d) water--4.0-14.0%
- (5) 5.0-30% water
- said composition being thixotrophic and sprayable through a 1" i.d. hose having a length of 75 feet.
10 more elements
Dependencies are inferred from the claim text.