US3595544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for cement kiln
Assignee: United States Steel Corp
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Filing: 1969-07-15
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Granted: 1971-07-27
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Expires: 1989-07-15
Abstract
Abstract This invention relates to the combination of a rotary kiln for sintering raw material into sinter and having drive means connected to the rotary kiln for rotating the rotary kiln, heating means disposed adjacent one end of the rotary kiln for directing a heated fluid through the rotary kiln to sinter the raw material as the raw material passes through the rotary kiln from the other end of the rotary kiln to the one end of the rotary kiln, and control means associated with the rotary kiln for controlling the operation of one of the drive means and the heating means.
Inventors
- 👤 George T Curtis
- 👤 Marshal Hunt Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:29
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/42
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
248 words
In combination: a. a rotary kiln for sintering raw material into sinter and having: 1. drive means connected to said rotary kiln for rotating said rotary kiln, 2. heating means disposed adjacent one end of said rotary kiln for directing a heated fluid through said rotary kiln to sinter said raw material as said raw material passes through said rotary kiln from the other end of said rotary kiln to said one end of said rotary kiln, and b. control means associated with said rotary kiln for controlling the operation of one means of said drive means and said heating means, c. said control means having: 1. temperature measuring means disposed adjacent said one end of said rotary kiln for measuring the temperature at said one end of said rotary kiln and for producing a temperature signal, and 2. a first control means to said temperature measuring means and to said one means of said drive means and said heating means and adapted to receive said temperature signal, d. said control means also having: 1. a device disposed adjacent said other end of said rotary kiln for determining the True CO2 content of the exit gases of said rotary kiln and for producing a True CO2 signal, and said first control means connected to said device and to said one means of said drive means and said heating means for controlling the operation of said one means in response to said temperature signal and said True CO2 signal.
Claim 2
Dependent Claim
248 words
In combination: a. a rotary kiln for sintering raw material into sinter and having: 1. drive means connected to said rotary kiln for rotating said rotary kiln, 2. heating means disposed adjacent one end of said rotary kiln for directing a heated fluid through said rotary kiln to sinter said raw material as said raw material passes through said rotary kiln from the other end of said rotary kiln to said one end of said rotary kiln, and b. control means associated with said rotary kiln for controlling the operation of one means of said drive means and said heating means, c. said control means having: 1. temperature measuring means disposed adjacent said one end of said rotary kiln for measuring the temperature at said one end of said rotary kiln and for producing a temperature signal, and 2. a first control means to said temperature measuring means and to said one means of said drive means and said heating means and adapted to receive said temperature signal, d. said control means also having: 1. a device disposed adjacent said other end of said rotary kiln for determining the True CO2 content of the exit gases of said rotary kiln and for producing a True CO2 signal, and said first control means connected to said device and to said one means of said drive means and said heating means for controlling the operation of said one means in response to said temperature signal and said True CO2 signal.
Claim 3
Dependent Claim
78 words
heating means disposed adjacent one end of said rotary kiln for directing a heated fluid through said rotary kiln to sinter said raw material as said raw material passes through said rotary kiln from the other end of said rotary kiln to said one end of said rotary kiln, and b. control means associated with said rotary kiln for controlling the operation of one means of said drive means and said heating means, c. said control means having:
Claim 4
Dependent Claim
78 words
heating means disposed adjacent one end of said rotary kiln for directing a heated fluid through said rotary kiln to sinter said raw material as said raw material passes through said rotary kiln from the other end of said rotary kiln to said one end of said rotary kiln, and b. control means associated with said rotary kiln for controlling the operation of one means of said drive means and said heating means, c. said control means having:
Claim 5
Dependent Claim
35 words
a first control means to said temperature measuring means and to said one means of said drive means and said heating means and adapted to receive said temperature signal, d. said control means also having:
Claim 6
Dependent Claim
35 words
a first control means to said temperature measuring means and to said one means of said drive means and said heating means and adapted to receive said temperature signal, d. said control means also having:
Claim 7
Dependent Claim
14 words
The combination recited in claim 1 wherein said one means is said drive means.
Claim 8
Dependent Claim
14 words
The combination recited in claim 1 wherein said one means iS said heating means.
Claim 9
Dependent Claim
34 words
The combination recited in claim 1 wherein said first control means has computer means connected to said temperature measuring means and a first control element connected to said computer means and said one means.
Claim 10
Dependent Claim
36 words
The combination recited in claim 1 wherein said first control means has controller recorder means connected to said temperature measuring means and a first control element connected to said controller recorder means and said one means.
Claim 11
Dependent Claim
32 words
The combination recited in claim 1 wherein said first control means has computer means connected to said device and a second control element connected to said computer means and said one means.
Claim 12
Dependent Claim
35 words
The combination recited in claim 1 wherein said first control means has controller recorder means connected to said device and a second control element connected to said controller recorder means and to said one means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |