US4192730A
Expired / Lapsed
US
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Carbonaceous luting paste and ambient temperature luting process
Assignee: Carbone Savoie SAS
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Filing: 1979-04-20
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Granted: 1980-03-11
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Expires: 1999-04-20
Abstract
Abstract A carbonaceous paste is disclosed which is used at ambient temperature without need for prior heating. The paste contains: at least 70% of calcined carbonaceous material; a low-temperature plasticizing agent such as molasses, a sugar, an alginate or a lignosulfonate; and a high-temperature plasticizing agent such as a dry pitch. The paste is used in particular for luting aluminum electrolysis cells.
Inventors
- 👤 Daniel Dumas
- 👤 Serge Lacroix
- 👤 Jean Vallon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:52
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/08; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134; Y02P10/25
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
43 words
A carbonaceous luting paste capable of being cold shaped, essentially comprising at least about 70% by weight of particulate calcined carbonaceous material, a high-temperature plasticizing agent comprising a water-insoluble organic carbonaceous compound, and an ambient-temperature plasticizing agent comprising a compound in aqueous solution.
Claim 2
Dependent Claim
43 words
A carbonaceous luting paste capable of being cold shaped, essentially comprising at least about 70% by weight of particulate calcined carbonaceous material, a high-temperature plasticizing agent comprising a water-insoluble organic carbonaceous compound, and an ambient-temperature plasticizing agent comprising a compound in aqueous solution.
Claim 3
Dependent Claim
31 words
A carbonaceous paste according to claim 1 wherein the ambient-temperature plasticizing agent is present in a concentration wherein the water content of the paste does not exceed about 5% by weight.
Claim 4
Dependent Claim
34 words
A carbonaceous paste according to claim 2 wherein the water content is limited to about 3% by weight, the content of aqueous solution of ambient-temperature plasticizing agent does not exceed about 13% by weight.
Claim 5
Dependent Claim
32 words
A carbonaceous paste according to claim 1 wherein the ambient-temperature plasticizing agent is an aqueous solution of a compound selected from the group consisting of molasses, sugar, alginate, lignosulfonate and mixtures thereof.
Claim 6
Dependent Claim
27 words
A carbonaceous paste according to claim 1 wherein the high-temperature plasticizing agent is selected from the group consisting of a water-insoluble thermoplastic resin, pitch and mixtures thereof.
Claim 7
Dependent Claim
29 words
A carbonaceous paste according to claim 1 comprising from 8 to 15% by weight of ambient-temperature plasticizing agent and from 6 to 15% by weight of high-temperature plasticizing agent.
Claim 8
Dependent Claim
27 words
A carbonaceous paste according to claim 1 wherein the carbonaceous materials contained therein are selected from the group consisting of waste from pre-baked graphite or carbon blocks.
Claim 9
Dependent Claim
28 words
A carbonaceous paste according to claim 1 wherein the particulate calcined carbonaceous materials contained therein comprise from 50 to 80% of fines which are smaller than 0.25 mm.
Claim 10
Dependent Claim
12 words
A carbonaceous paste according to claim 1 including an anti-mildew preserving agent.
Claim 11
Dependent Claim
93 words
In a process for forming carbonaceous linings intended to be baked, and comprising linings at least partially produced by utilization of a carbonaceous paste the improvement comprising applying at ambient temperature, without preliminary heating of the paste, paste substrate or the materials with which the paste is brought into contact, a carbonaceous paste capable of being cold shaped and essentially comprising at least about 70% by weight of calcined particulate carbonaceous material, a high-temperature plasticizing agent comprising a water-insoluble organic carbonaceous compound, and an ambient-temperature plasticizing agent comprising a compound in aqueous solution.
Claim 12
Dependent Claim
93 words
In a process for forming carbonaceous linings intended to be baked, and comprising linings at least partially produced by utilization of a carbonaceous paste the improvement comprising applying at ambient temperature, without preliminary heating of the paste, paste substrate or the materials with which the paste is brought into contact, a carbonaceous paste capable of being cold shaped and essentially comprising at least about 70% by weight of calcined particulate carbonaceous material, a high-temperature plasticizing agent comprising a water-insoluble organic carbonaceous compound, and an ambient-temperature plasticizing agent comprising a compound in aqueous solution.
Claim 13
Dependent Claim
36 words
A process according to claim 10 wherein the carbonaceous lining which is formed comprises pre-baked carbon blocks which are disposed side-by-side and which are jointed by filling the spaces, at ambient temprature, with said carbonaceous paste.
Claim 14
Dependent Claim
12 words
The process of claim 10 carried forth for luting aluminum electrolysis cells.
Claim 15
Dependent Claim
20 words
The process of claim 10 carried forth for forming linings for runners or channels for casting liquid alloys or metals.
Claim 16
Dependent Claim
20 words
The process of claim 10 carried forth for forming furnace linings comprising a generally monalithic layer of said carbonaceous paste.
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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) | 1983-03-11 | 1983-09-10 | 1984-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-11 | 1987-09-10 | 1988-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-11 | 1991-09-10 | 1992-03-11 | $7700.00 | Window Closed / Lapsed |