US3897256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory lining mixture for hot metallurgical vessels
Assignee: Individual
•
Filing: 1973-01-04
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Granted: 1975-07-29
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Expires: 1993-01-04
Abstract
Abstract A method for relining metallurgical ladles, soaking pits, and furnaces at temperatures of at least about 250*F by applying a mixture of refractory materials against a prior-existing lining without prior cooling thereof, the relining thickness being at least one-fourth inch. The dry refractory mixture consists essentially of, by weight, from about 1/2 % to about 4% of sodium silicate, from about 1/2 % to about 4% of an organic binder, from about 20% to 80% of clay, and from about 12% to about 72% quartzite. To facilitate its application, the dry refractory mixture may be mixed with about 4% to 6% water as it is applied.
Inventors
- 👤 Crawford B Murton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:31
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/634; C04B35/63492; B; B22; B22C; B22C15/00; B22C15/20; B22D; B22D41/00; B22D41/02; C04B35/6303; C04B35/6316; C04B35/63496; C04B35/66; F; F27; F27D; F27D1/00; F27D1/16; F27D1/1636; F27D1/1673; C04B2111/00; C04B2111/00474; C04B2111/00482; C04B2111/0087; C04B2111/72; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/34; C04B2235/3418; C04B2235/70; C04B2235/96; C04B2235/9669; C04B2235/9676
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
106 words
A REFRACTORY COMPOSITION SUITABLE FOR APPLICATION AT TEMPERATURES OF AT LEAST 250*F AND BEING CAPABLE OF BEING APPLIED TO HOT VESSEL BY PROJECTION CONSISTING ESSENTIALLY OF, BY WEIGHT, FROM ABOUT 1/2% TO ABOUT 4% OF AT LEAST ONE OF AN ALKALI SILICATE SELECTED FROM THE GROUP CONSISTING OF POTASSIUM SILICATE AND SODIUM SILICATE, FROM ABOUT 1/2% TO ABOUT 4% OF ORGANIC MATERIAL, SELECTED FROM THE GROUP CONSISTING OF PITCH, TAR, ROSIN, POLYVINYLCHLORIDE, POLYETHYLTERTRACHLORIDE, AND MIXTURES THEREOF, THE ORGANIC MATERIAL HAVING MELTING POINTS OF FROM ABOUT 250* TO 400*F, FROM ABOUT 12% TO ABOUT 72% OF QUARTIZITE, AND FROM ABOUT 20% TO ABOUT 80% OF BONDING CLAY.
Claim 2
Dependent Claim
106 words
A REFRACTORY COMPOSITION SUITABLE FOR APPLICATION AT TEMPERATURES OF AT LEAST 250*F AND BEING CAPABLE OF BEING APPLIED TO HOT VESSEL BY PROJECTION CONSISTING ESSENTIALLY OF, BY WEIGHT, FROM ABOUT 1/2% TO ABOUT 4% OF AT LEAST ONE OF AN ALKALI SILICATE SELECTED FROM THE GROUP CONSISTING OF POTASSIUM SILICATE AND SODIUM SILICATE, FROM ABOUT 1/2% TO ABOUT 4% OF ORGANIC MATERIAL, SELECTED FROM THE GROUP CONSISTING OF PITCH, TAR, ROSIN, POLYVINYLCHLORIDE, POLYETHYLTERTRACHLORIDE, AND MIXTURES THEREOF, THE ORGANIC MATERIAL HAVING MELTING POINTS OF FROM ABOUT 250* TO 400*F, FROM ABOUT 12% TO ABOUT 72% OF QUARTIZITE, AND FROM ABOUT 20% TO ABOUT 80% OF BONDING CLAY.
Claim 3
Dependent Claim
39 words
The mixture of claim 1 wherein there is from about 1.5% to about 2.5% sodium silicate, from about 1.5% to about 2.5% organic material, from about 25% to about 70% quartzite, and from about 20% to about 80% clay.
Claim 4
Dependent Claim
23 words
The mixture of claim 1 wherein there is about 2% sodium silicate, about 2% organic material, about 36% quartzite, and about 60% clay.
Claim 5
Dependent Claim
20 words
The mixture of claim 1 wherein the mixture contains water in an amount of from about 4% to about 6%.
Claim 6
Dependent Claim
36 words
The mixture of claim 4 wherein there is about 2% sodium silicate and potassium silicate, from about 1.5% to about 2.5% organic material, about 12% to about 50% quartzite, and about 20% to about 80% clay.
Claim 7
Dependent Claim
35 words
The mixture of claim 4 wherein there is about 1.5% to about 2.5% sodium silicate, about 1.5% to about 2.5% organic material, about 25% to about 50% quartzite, and about 45% to about 70% clay.
Claim 8
Dependent Claim
23 words
The mixture of claim 4 wherein there is about 2% sodium silicate, about 2% organic material, about 36% quartzite, and about 60% clay.
Claim 9
Dependent Claim
32 words
The mixture of claim 1 wherein there is at least one material of the group consisting of sodium silicate and potassium silicate in an amount of from about 1.5% to about 2.5%.
References Cited (Backward Citations)
US3026212A
Cited
US3193402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |