US3744959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of burning molded carbon bodies in round-down-draft kilns
Assignee: SIGRI ELEKTROGRAPHIT GmbH
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Filing: 1971-02-18
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Granted: 1973-07-10
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Expires: 1991-02-18
Abstract
Abstract A process for burning molded carbon bodies in round down-draft kilns, which comprises cooling at least one of the chambers ahead of the fire box by the introduction of cold gases or vapors.
Inventors
- 👤 E Nedopil
- 👤 W Krohe
- 👤 K Wittmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:29
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
106 words
In the process for burning carbon bodies in round down-draft kilns comprising a series of longitudinally disposed successive sections including preheating, firing and cooling zones, each section comprising a plurality of chambers adapted to contain the carbon bodies and a protective packing material, each of the chambers containing fire shafts, fluid fuel burner units disposed in at least one of the chambers of the firing zone and fans to suck flue gas from the firing zone through the preheating zone to a chimney, the improvement which comprises cooling at least one of the chambers of the preheating zone by the introduction of cold gases or vapors.
Claim 2
Dependent Claim
106 words
In the process for burning carbon bodies in round down-draft kilns comprising a series of longitudinally disposed successive sections including preheating, firing and cooling zones, each section comprising a plurality of chambers adapted to contain the carbon bodies and a protective packing material, each of the chambers containing fire shafts, fluid fuel burner units disposed in at least one of the chambers of the firing zone and fans to suck flue gas from the firing zone through the preheating zone to a chimney, the improvement which comprises cooling at least one of the chambers of the preheating zone by the introduction of cold gases or vapors.
Claim 3
Dependent Claim
16 words
The process of claim 1, wherein a plurality of chambers are cooled in the preheating zone.
Claim 4
Dependent Claim
13 words
The process of claim 1, wherein air is used as the cooling gas.
Claim 5
Dependent Claim
14 words
The process of claim 1, wherein water vapor is used as the cooling gas.
Claim 6
Dependent Claim
17 words
The process of claim 1, wherein cooling water is sprayed into one chamber of the preheating zone.
Claim 7
Dependent Claim
19 words
The process of claim 5, wherein the cooling water is sprayed against the fire shafts in the preheating zone.
Claim 8
Dependent Claim
14 words
The process of claim 5, wherein the cooling water is sprayed with compressed air.
Claim 9
Dependent Claim
30 words
The process of claim 5, which includes measuring the temperature in the one chamber of the preheating zone and, in accordance therewith, controlling the amount of the cooling water sprayed.
Claim 10
Dependent Claim
29 words
The process of claim 1, wherein the one chamber of the preheating zone is cooled, partially by spraying water and partially by the introduction of cold gas or vapor.
Claim 11
Dependent Claim
22 words
The process of claim 1, which includes measuring the draft between the firing zone and the cooled chamber in the preheating zone.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |