US4457705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcining system for the manufacture of cement clinker and the like
Assignee: Kloeckner Humboldt Deutz AG
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Filing: 1982-08-31
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Granted: 1984-07-03
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Expires: 2002-08-31
Abstract
Abstract A calcining system for the manufacture of cement clinker and the like including the combination of a preheater into which the raw material to be calcined is introduced, a rotary kiln which receives the preheated material either directly or through a preliminary calcinator, and a cooler which receives the discharge of the rotary kiln. In accordance with the invention, a heater means is operatively associated directly with the cooler to bring the cooler up to operating temperatures during start-up.
Inventors
- 👤 Hubert Ramesohl
- 👤 Horst Herchenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:58
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/38; C; C04; C04B; C04B7/00; C04B7/36; C04B7/43; F27B7/2016; F27B7/2025; F27B7/2033; Y; Y02; Y02P; Y02P40/00; Y02P40/10; Y02P40/121
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
73 words
A calcining system for the manufacture of cement clinker and the like comprising: a preheater, means for introducing raw material to be calcined into said preheater, a rotary kiln, means for transporting preheated material from said preheater into said rotary kiln, a cooler, means connecting the discharge of said rotary kiln to said cooler, and heater means operatively associated directly with said cooler to bring said cooler up to operating temperatures during start-up.
Claim 2
Dependent Claim
73 words
A calcining system for the manufacture of cement clinker and the like comprising: a preheater, means for introducing raw material to be calcined into said preheater, a rotary kiln, means for transporting preheated material from said preheater into said rotary kiln, a cooler, means connecting the discharge of said rotary kiln to said cooler, and heater means operatively associated directly with said cooler to bring said cooler up to operating temperatures during start-up.
Claim 3
Dependent Claim
20 words
A system according to claim 1 in which: said heater means is independent of the remainder of the calcining system.
Claim 4
Dependent Claim
28 words
A system according to claim 1 which includes: a source of hot gas independent of the remaining calcining system connected to said heater means for heating the same.
Claim 5
Dependent Claim
17 words
A system according to claim 3 in which: said source of hot gas is a separate burner.
Claim 6
Dependent Claim
15 words
A system according to claim 1 in which: said heater means includes an electrical heater.
Claim 7
Dependent Claim
17 words
A system according to claim 1 in which: said heater means includes a circulating fluid heat exchanger.
Claim 8
Dependent Claim
32 words
A system according to claim 1 which includes: a conduit arranged to recycle gases from said cooler into said preheater, and burner means disposed in said conduit for heating the interior thereof.
Claim 9
Dependent Claim
30 words
A system according to claim 1 which includes: a calcinator interconnecting said preheater and said rotary kiln, and an additional burner means positioned in said calcinator to preheat the same.
Claim 10
Dependent Claim
28 words
A system according to claim 1 in which: said cooler is a tube type cooler and said heater means is positioned at the discharge end of said cooler.
Claim 11
Dependent Claim
33 words
A system according to claim 1 which includes: means for introducing coal dust as a fuel into said rotary kiln, and means for introducing coal dust as a fuel into said heater means.
References Cited (Backward Citations)
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Cited
US3091443A
Cited
US3824069A
Cited
US3782888A
Cited
US4104018A
Cited
US4193755A
Cited
US4315734A
Cited
US4367065A
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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) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |