US3637412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladle lining refractory
Assignee: VFR Inc 901 EAST 8TH AVENUE KING OF PRUSSIA PA 19406 A DE CORP
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Filing: 1968-09-16
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Granted: 1972-01-25
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Expires: 1988-09-16
Abstract
Abstract A refractory material for lining metallurgical ladles and the method of producing the same are disclosed. The material comprises refractory aggregate particles such as calcined flint clay which are coated with various materials including an outer coating of graphite which is covered with an elastic film of material such as aluminum phosphate binder. The graphite gives the refractory mixture the desirable properties and the film protects the graphite from oxidation and wear. The material is prepared in apparatus such as a pelletizer with an inclined revolving disk whereby the separate particles are each coated to produce a final mixture of discrete particles which are flowable and thus easy to handle. The refractory may be used as a monolithic lining or it may be formed into brick.
Inventors
- 👤 Frank T Felice
- 👤 Robert E Fisher
- 👤 Louis J Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:32
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/02; F; F27; F27D; F27D1/00; F27D1/16; F27D1/0003; F27D1/0006; F27D1/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
43 words
A method as recited in claim 1 and further including the step of adding a quantity of silicate of aluminum selected from the group consisting of kyanite, andalusite and sillimanite to said discrete particles subsequent to step (b) and prior to step (d).
Claim 2
Dependent Claim
18 words
A method as recited in claim 2 wherein said phosphate binder is mixed with water prior to coating.
Claim 3
Dependent Claim
46 words
A method as recited in claim 3 wherein said quantities comprise from 40-95 parts by weight refractory aggregate, 1-15 parts by weight phosphate binder, 1-15 parts by weight water, 2-30 parts by weight graphite and up to 20 parts by weight of said silicate of aluminum.
Claim 4
Dependent Claim
60 words
The method as recited in claim 4 wherein said refractory aggregate particles are selected from the group consisting of calcined flint clay, alumina, zircon, silica, chrome ore, and mullite; said bonding clay is selected from the group consisting of bond fireclay, kaolin and bentonite; and said phosphate binder is selected from the group consisting of aluminum phosphate and phosphoric acid.
Claim 5
Independent Claim
138 words
A method of producing a refractory composition of nonagglomerated, discrete particles for monolithic construction comprising the steps of: a. providing discrete calcined flint clay particles having a particle size primarily between 3 and 100 mesh; b. spraying a slurry of aluminum phosphate and water on said discrete flint clay particles to coat said particles therewith; c. mixing a bond clay selected from the group consisting of bond fireclay and kaolin with the discrete particles from step (b) to coat said particles therewith, said bond clay having been sized to pass through a 12 mesh screen; d. mixing graphite with the discrete particles from step (c), said graphite having a particle size primarily less than 50 mesh; and e. adding additional aluminum phosphate and water slurry to the discrete particles from step (d) to produce said nonagglomerated refractory composition.
Claim 6
Dependent Claim
71 words
A method as recited in claim 6 wherein said refractory composition comprises about 64.0 percent calcined flint clay, 6.5 percent aluminum phosphate, 5.1 percent water, 10.3 percent bonding clay, and 8.9 percent graphite and further including 5.2 percent of silicate of aluminum selected from the group consisting of kyanite, andalusite and sillimanite, said silicate of aluminum being added to said discrete particles subsequent to step (b) and prior to step (d).
Claim 7
Dependent Claim
50 words
A refractory composition consisting essentially of a base of refractory aggregate particles, a coating on said particles of a phosphate binder, a coating of bonding clay over said phosphate binder coating, a coating of graphite over said bonding clay, and a further coating of phosphate binder over said graphite coating.
Claim 8
Dependent Claim
28 words
A refractory composition as recited in claim 8 and further including a quantity of silicate of aluminum applied to said particles prior to the coating of graphite thereon.
Claim 9
Dependent Claim
26 words
A refractory composition as recited in claim 9 and further including a quantity of water mixed with said phosphate binder prior to coating said particles therewith.
Claim 10
Dependent Claim
52 words
A refractory composition as recited in claim 10 wherein said composition contains about 40-95 parts by weight refractory-aggregate, 1-15 parts by weight phosphate binder, 1-15 parts by weight water, 2-30 parts by weight bonding clay, 2-40 parts by weight graphite and up to 20 parts by weight of said silicate of aluminum.
Claim 11
Dependent Claim
48 words
A refractory composition consisting essentially of calcined fliNt clay particles, a coating of aluminum phosphate on said particles, a coating of bonding clay over said aluminum phosphate coating, a coating of graphite over said coating of bonding clay, and a coating of aluminum phosphate over said graphite coating.
Claim 12
Dependent Claim
26 words
A refractory composition as recited in claim 12 and further including a quantity of kyanite applied to said particles prior to the coating of graphite thereon.
Claim 13
Dependent Claim
59 words
A refractory composition as recited in claim 13 and further including a quantity of water mixed therewith wherein said composition contains about 40-95 parts by weight calcined flint clay, 1-15 parts by weight aluminum phosphate, 1-15 parts by weight water, 2-30 parts by weight bonding clay, 2-40 parts by weight graphite and up to 20 parts by weight kyanite.
Claim 14
Dependent Claim
45 words
A refractory composition as recited in claim 13 and further including a quantity of water mixed therewith wherein said composition contains about 64.0 percent calcined flint clay, 6.5 percent aluminum phosphate 5.1 percent water, 10.3 percent bonding clay, 5.2 percent kyanite and 8.9 percent graphite.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |