US4425092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for burning fine-grained material, particularly for the manufacture of cement clinkers
Assignee: Kloeckner Humboldt Deutz AG
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Filing: 1981-08-05
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Granted: 1984-01-10
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Expires: 2001-08-05
Abstract
Abstract The invention relates to a method for burning fine-grain material, particularly for the manufacture of cement clinker from cement raw meal. The material is thermally treated in a multi-stage burning process with a pre-heating stage, a calcining stage with a high-degree of calcination, a sintering stage in a very short rotary kiln and a cooling stage. Fuel is introduced both into the sintering stage in the short rotary kiln as well as into the calcinating stage. Hot exhaust air from the cooling stage is supplied both to the sintering stage as well as to the calcining stage as furnace air. The invention also relates to an apparatus for the manufacture of mineral products of the burning process such as cement clinker.
Inventors
- 👤 Kunibert Brachthauser
- 👤 Horst Herchenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:15
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/36; C04B7/43; F; F27; F27B; F27B7/00; F27B7/20; F27B7/2016; F27B7/2025; F27B7/2033
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
104 words
In a combustion installation for the production of mineral combustion products such as cement clinkers out of raw meal having a raw meal preheater, a rotary kiln and a clinker cooler, an improvement comprising: a calciner having an input connected to the output of said preheater and an output connected to the input of said rotary kiln; fossil fuel burning means operatively connected to said calciner to partly heat and partly calcine the raw meal passing therethrough; and non-combustion heating means operatively connected to said calciner to provide additional heat to the raw meal passing therethrough without introducing any additional gases into said calciner.
Claim 2
Dependent Claim
104 words
In a combustion installation for the production of mineral combustion products such as cement clinkers out of raw meal having a raw meal preheater, a rotary kiln and a clinker cooler, an improvement comprising: a calciner having an input connected to the output of said preheater and an output connected to the input of said rotary kiln; fossil fuel burning means operatively connected to said calciner to partly heat and partly calcine the raw meal passing therethrough; and non-combustion heating means operatively connected to said calciner to provide additional heat to the raw meal passing therethrough without introducing any additional gases into said calciner.
Claim 3
Dependent Claim
52 words
The installation of claim 1, including further: second fossil fuel burning means operatively connected to said kiln to partly heat and sinter the material passing therethrough; and second heating means operatively connected to said kiln to provide additional heat to the material passing therethrough without introducing any additional gases into said kiln.
Claim 4
Dependent Claim
18 words
The installation of claim 1, wherein said heating means comprises: electric heating elements consisting of resistance heating units.
Claim 5
Dependent Claim
26 words
The installation of claim 1, wherein said heating means comprises: a source of high energy particles adapted to irradiate the raw meal passing through said calciner.
Claim 6
Dependent Claim
25 words
The installation of claim 1, wherein said heating means comprises: a source of infrared radiation adapted to irradiate the raw meal passing through said calciner.
Claim 7
Dependent Claim
28 words
The installation of claim 1, wherein said heating means comprises: a source of heat generated by solar energy adapted to heat the raw meal passing through said calciner.
Claim 8
Dependent Claim
32 words
The installation of claim 1, wherein said calciner has two stages with said fossil fuel burning means comprising first and second heating locations with one location in each of said two stages.
Claim 9
Dependent Claim
43 words
The installation according to claim 1, wherein: said fossil fuel burning means is adapted to generate on the order of 80% of the heat needed for said calciner; and said heating means is adapted to generate the remaining heat needed for said calciner.
Claim 10
Dependent Claim
15 words
The installation according to claim 2, wherein: said second heating means consisting of resistance heaters.
Claim 11
Dependent Claim
27 words
The installation according to claim 2, including a third heating means affixed to an input end of said kiln; said third heating means consisting of resistance heaters.
Claim 12
Dependent Claim
27 words
The installation according to claim 2, including a fourth heating means affixed to an output end of said kiln; said fourth heating means consisting of resistance heaters.
Claim 13
Dependent Claim
14 words
The installation of claim 2 wherein said second heating means consists of induction heaters.
Claim 14
Dependent Claim
16 words
The installation of according to claim 2 wherein said second heating means consists of infrared heaters.
Claim 15
Dependent Claim
15 words
The installation according to claim 2 wherein said second heating means consists of solar heaters.
Claim 16
Dependent Claim
19 words
The installation according to claim 2 wherein said second heating means consists of sources of high energy particle beams.
Claim 17
Dependent Claim
23 words
The installation of claim 2 including a third heating means affixed to an input end of said kiln and consisting of induction heaters.
Claim 18
Dependent Claim
23 words
The installation of claim 2 including a third heating means affixed to an input end of said kiln and consisting of infrared heaters.
Claim 19
Dependent Claim
23 words
The installation of claim 2 including a third heating means affixed to an input end of said kiln and consisting of solar heaters.
Claim 20
Dependent Claim
27 words
The installation of claim 2 including a third heating means affixed to an input end of said kiln and consisting of sources of high energy particle beams.
Claim 21
Dependent Claim
26 words
The installation of claim 2 including a fourth heating means affixed to an output end of said kiln, said fourth heating means consisting of induction heaters.
Claim 22
Dependent Claim
26 words
The installation of claim 2 including a fourth heating means affixed to an output end of said kiln, said fourth heating means consisting of infrared heaters.
Claim 23
Dependent Claim
26 words
The installation of claim 2 including a fourth heating means affixed to an output end of said kiln, said fourth heating means consisting of solar heaters.
Claim 24
Dependent Claim
30 words
The installation of claim 2 including a fourth heating means affixed to an output end of said kiln, said fourth heating means consisting of sources of high energy particle beams.
Claim 25
Dependent Claim
13 words
The installation of claim 1 wherein said heating means comprises inductive heating means.
Claim 26
Dependent Claim
143 words
In a combustion installation for the production of mineral combustion products such as cement clinkers out of raw meal comprising: a raw meal preheater; a calciner receiving preheated meal from said preheater; a rotary kiln having an input end receiving calcined meal from said calciner, and an output end; a clinker cooler receiving clinker from the output end of said rotary kiln; fossil fuel burning means operatively connected to said kiln to partly heat and sinter the material passing therethrough; first heating means affixed along the length of said kiln between said input end and said output end; second heating means affixed at said input end of said kiln; third heating means affixed at said output end of said kiln; said heating means being adapted to provide additional non-combustion type heat to the material passing through said kiln without introducing additional gases therein.
Claim 27
Dependent Claim
143 words
In a combustion installation for the production of mineral combustion products such as cement clinkers out of raw meal comprising: a raw meal preheater; a calciner receiving preheated meal from said preheater; a rotary kiln having an input end receiving calcined meal from said calciner, and an output end; a clinker cooler receiving clinker from the output end of said rotary kiln; fossil fuel burning means operatively connected to said kiln to partly heat and sinter the material passing therethrough; first heating means affixed along the length of said kiln between said input end and said output end; second heating means affixed at said input end of said kiln; third heating means affixed at said output end of said kiln; said heating means being adapted to provide additional non-combustion type heat to the material passing through said kiln without introducing additional gases therein.
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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) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |