US3744962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for firing or sintering fine material
Assignee: ThyssenKrupp Industrial Solutions AG
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Filing: 1971-09-09
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Granted: 1973-07-10
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Expires: 1991-09-09
Abstract
Abstract The apparatus comprises a firing or sintering chamber followed by a fine material separator. Material from a fine material preheater and air form an air preheater are introduced into a premixing chamber, A connection is provided for introducing a mixture of preheated fine material and air from the premixing chamber into the firing or sintering chamber, and fuel is introduced in a flow which is substantialby coaxial with the flow of air and fine material, to cause the fuel to burn in the air and to heat the fine material.
Inventors
- 👤 H Ritzmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:41
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/34; F27B7/2016; F27B7/2025
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
119 words
Apparatus for firing or sintering fine material, comprising a tubular firing or sintering chamber having an inlet end, and having its opposite end connected to a fine material separator, an air preheater, a fine material preheater, a premixing chamber and means for introducing material from the fine material preheater and air from the air preheater into the premixing chamber, wherein the improvement comprises a feed nozzle leading from the premixing chamber into the inlet end of the tubular chamber, and an annular burner nozzle which is connected to a fuel supply and is coaxial with and surrounds the feed nozzle to cause the fine material from the feed nozzle to enter coaxially the flame produced by the burner nozzle.
Claim 2
Dependent Claim
119 words
Apparatus for firing or sintering fine material, comprising a tubular firing or sintering chamber having an inlet end, and having its opposite end connected to a fine material separator, an air preheater, a fine material preheater, a premixing chamber and means for introducing material from the fine material preheater and air from the air preheater into the premixing chamber, wherein the improvement comprises a feed nozzle leading from the premixing chamber into the inlet end of the tubular chamber, and an annular burner nozzle which is connected to a fuel supply and is coaxial with and surrounds the feed nozzle to cause the fine material from the feed nozzle to enter coaxially the flame produced by the burner nozzle.
Claim 3
Dependent Claim
30 words
Apparatus according to claim 1, wherein the nozzles for introducing fuel, fine material and air into the firing or sintering chamber discharge into the chamber in a substantially horizontal direction.
Claim 4
Dependent Claim
19 words
Apparatus according to claim 1, wherein the fine material separator is directly connected to the firing or sintering chamber.
References Cited (Backward Citations)
US2689973A
Cited
US3603568A
Cited
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 |