US3982699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and plant for producing cement or other material of given fineness and granular structure
Assignee: CNH Industrial Baumaschinen GmbH
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Filing: 1974-12-23
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Granted: 1976-09-28
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Expires: 1994-12-23
Abstract
Abstract Method of producing cement or other material of given fineness and granular structure includes delivering material ground in individual chambers of a tube mill having two adjacent grinding chambers, delivering the ground material from each of the chambers to coarse-grain separator means associated with the chambers, separating a fines-free coarse-grain component in the coarse-grain separator means and returning the coarse-grain component to one of the adjacent chambers, feeding the fines component of the coarse-grain separator means to a fine-grain separator, separating a fine-grain component from a coarse-grain component in the fine-grain separator, withdrawing the fine-grain component from the fine-grain separator as end product, and returning the coarse-grain component of the fine-grain separator to the coarse-grain separator means; and plant for carrying out the foregoing method.
Inventors
- 👤 Heinz Jager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:18
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/18; B02C17/183; B02C17/1835; B02C17/185; B02C17/184; Y; Y02; Y02P; Y02P40/00; Y02P40/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
121 words
Method of producing cement or other material of given fineness and granular structure which comprises delivering material to be reduced into a first individual chamber of a tube mill having two adjacent grinding chambers, said chambers having no direct connection with each other, delivering the ground material from each of the chambers to coarse-grain separator means associated with the chambers, separating a fines-free coarse-grain component in the coarse-grain separator means and returning the coarse-grain component to one of the adjacent chambers, feeding the fines component of the coarse-grain separator means to a fine-grain separator, separating a fine-grain component from a coarse-grain component in the fine-grain separator, withdrawing the fine-grain component from the fine-grain separator as end product, and returning the coarse-grain
Claim 2
Dependent Claim
121 words
Method of producing cement or other material of given fineness and granular structure which comprises delivering material to be reduced into a first individual chamber of a tube mill having two adjacent grinding chambers, said chambers having no direct connection with each other, delivering the ground material from each of the chambers to coarse-grain separator means associated with the chambers, separating a fines-free coarse-grain component in the coarse-grain separator means and returning the coarse-grain component to one of the adjacent chambers, feeding the fines component of the coarse-grain separator means to a fine-grain separator, separating a fine-grain component from a coarse-grain component in the fine-grain separator, withdrawing the fine-grain component from the fine-grain separator as end product, and returning the coarse-grain
Claim 3
Dependent Claim
34 words
Method according to claim 1 which comprises returning at least part of the coarse-grain component separated in the fine-grain separator to said grinding chamber other than said first chamber in which said material to
Claim 4
Dependent Claim
33 words
Method according to claim 1 which comprises passing at least part of the coarse-grain component separated in the coarse-grain separator means and in the fine-grain separator through a fine-grain mill prior to being
Claim 5
Dependent Claim
22 words
Method according to claim 1 wherein all of said fines-free coarse-grain component is directed to said grinding chamber other than said first
Claim 6
Dependent Claim
87 words
Method according to claim 1 wherein said fines component of said coarse-grain separator means is fed to another coarse-grain separator disposed adjacent said coarse-grain separator means for separation and return for grinding in another chamber of said tube mill of a coarse-grain component and feeding the fines component of said adjacent coarse-grain separator to another fine-grain separator, separating a fine-grain component from a coarse-grain component in said latter fine-grain separator, withdrawing said latter fine-grain component as end product, and returning said latter coarse-grain component to said adjacent
Claim 7
Dependent Claim
141 words
Method of producing cement or material of given fineness and granular structure which comprises delivering material to be reduced into a first individual chamber of a tube mill having at least two adjacent grinding chambers, said chambers having no direct connection with each other, delivering the ground material from each of the chambers to respective coarse-grain separator means associated with said chambers, separating a fines free coarse-grain component in said coarse-grain separator means and returning the coarse-grain component separated in the respective coarse-grain separator means to the chamber associated therewith, feeding the fines component of the respective coarse-grain separator means to the coarse-grain separator associated with a succeeding chamber of the tube mill, feeding the fine-grain component separated in the last of the coarse-grain separators to a fine-grain separator, and returning the coarse-grain component separated in the fine-grain separator to the
Claim 8
Dependent Claim
141 words
Method of producing cement or material of given fineness and granular structure which comprises delivering material to be reduced into a first individual chamber of a tube mill having at least two adjacent grinding chambers, said chambers having no direct connection with each other, delivering the ground material from each of the chambers to respective coarse-grain separator means associated with said chambers, separating a fines free coarse-grain component in said coarse-grain separator means and returning the coarse-grain component separated in the respective coarse-grain separator means to the chamber associated therewith, feeding the fines component of the respective coarse-grain separator means to the coarse-grain separator associated with a succeeding chamber of the tube mill, feeding the fine-grain component separated in the last of the coarse-grain separators to a fine-grain separator, and returning the coarse-grain component separated in the fine-grain separator to the
Claim 9
Dependent Claim
132 words
Apparatus for producing cement or other material of given fineness and granular structure comprising a tube mill having two grinding chambers with no direct connection with each other, inlet means in a first grinding chamber of said tube mill for introduction of material to be reduced, respective ground material discharge outlets for said grinding chambers, coarse-grain separator means, bucket conveyor means for conveying the ground material discharged from the outlets of each of said grinding chambers to said coarse-grain separator means, means for returning a fines-free coarse-grain component from said separator means to one of said chambers, a fine-grain separator after-connected to said coarse-grain separator means, means for withdrawing a fine-grain component from said fine-grain separator, means for withdrawing a coarse-grain component from said fine-grain separator, and means for returning said latter
Claim 10
Dependent Claim
132 words
Apparatus for producing cement or other material of given fineness and granular structure comprising a tube mill having two grinding chambers with no direct connection with each other, inlet means in a first grinding chamber of said tube mill for introduction of material to be reduced, respective ground material discharge outlets for said grinding chambers, coarse-grain separator means, bucket conveyor means for conveying the ground material discharged from the outlets of each of said grinding chambers to said coarse-grain separator means, means for returning a fines-free coarse-grain component from said separator means to one of said chambers, a fine-grain separator after-connected to said coarse-grain separator means, means for withdrawing a fine-grain component from said fine-grain separator, means for withdrawing a coarse-grain component from said fine-grain separator, and means for returning said latter
Claim 11
Dependent Claim
134 words
Apparatus for producing cement or other material of given fineness and granular structure comprising a tube mill having at least two grinding chambers with no direct connection with each other, inlet means in a first grinding chamber of said tube mill for introduction of material to be reduced, respective ground material discharge outlets for said grinding chambers, a respective coarse-grain separator associated with each of said grinding chambers, a respective bucket conveyor between each of said chambers and the respective coarse-grain separator for conveying ground material discharged from the outlet of each of said grinding chambers to the respective coarse-grain separator, means for delivering a fine-grain component separated in the respective coarse-grain separators from next preceding to next succeeding coarse-grain separators, and a fine-grain separator after connected to the last of said coarse-grain separators.
Claim 12
Dependent Claim
134 words
Apparatus for producing cement or other material of given fineness and granular structure comprising a tube mill having at least two grinding chambers with no direct connection with each other, inlet means in a first grinding chamber of said tube mill for introduction of material to be reduced, respective ground material discharge outlets for said grinding chambers, a respective coarse-grain separator associated with each of said grinding chambers, a respective bucket conveyor between each of said chambers and the respective coarse-grain separator for conveying ground material discharged from the outlet of each of said grinding chambers to the respective coarse-grain separator, means for delivering a fine-grain component separated in the respective coarse-grain separators from next preceding to next succeeding coarse-grain separators, and a fine-grain separator after connected to the last of said coarse-grain separators.
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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) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |