US3692285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-stage calciner
Assignee: HAZELTON H AVERY
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Filing: 1971-02-19
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Granted: 1972-09-19
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Expires: 1991-02-19
Abstract
Abstract A multi-stage apparatus for drying and hardening ion ore pellets as they flow over a high-temperature sloping grid and pass through separated pre-heating and pre-cooling full flow areas. The apparatus provides a drying stage separated by a pre-heating area from the indurating stage that in turn is separated by a pre-cooling area from the cooling stage, with a single directional flow of air forced longitudinally through each stage to sequentially dry, heat and cool the green pellets as they flow through the apparatus.
Inventors
- 👤 Hazelton H Avery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:56
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/08; B01J8/12; B01J8/125; C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/2413; F; F26; F26B; F26B17/00; F26B17/12; F26B17/14; F26B17/1433
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
139 words
A multi-stage calciner apparatus comprising a vertically disposed cylinder having an upper inlet and lower discharge chutes for the material to be indurated, wherein the improvement comprises a. means for dividing the cylinder into superimposed stages for the sequential indurating treatment of fluidized material passing therethrough, b. a plurality of spherical elements of different diameters supported upon said dividing means so as to provide heated sloping grids over which the material to be treated flows in a continuous path, c. means external of said cylinder between certain of said stages for receiving and pre-treating the material as it passes between successive stages provided by said apparatus during its continuous flow therethrough, and d. means for supplying a continuous flow of gas through said different stages of said apparatus for effecting different temperature treatment of the material flowing continuously therethrough.
Claim 2
Dependent Claim
139 words
A multi-stage calciner apparatus comprising a vertically disposed cylinder having an upper inlet and lower discharge chutes for the material to be indurated, wherein the improvement comprises a. means for dividing the cylinder into superimposed stages for the sequential indurating treatment of fluidized material passing therethrough, b. a plurality of spherical elements of different diameters supported upon said dividing means so as to provide heated sloping grids over which the material to be treated flows in a continuous path, c. means external of said cylinder between certain of said stages for receiving and pre-treating the material as it passes between successive stages provided by said apparatus during its continuous flow therethrough, and d. means for supplying a continuous flow of gas through said different stages of said apparatus for effecting different temperature treatment of the material flowing continuously therethrough.
Claim 3
Dependent Claim
86 words
A multi-stage calciner apparatus as defined by claim 1 wherein said means for dividing the cylinder into superimposed stages comprises a plurality of inverted conical shelves having a center opening providing open communication between each of the superimposed stages, with said spherical elements supported upon said shelves and covering said center openings provided therein so as to form a sloping grid thereon through which said continuous flow of gas is permitted to pass and over which the fluidized material flows from one stage to the next.
Claim 4
Dependent Claim
58 words
A multi-stage calciner apparatus as defined by claim 1 wherein said spherical elements are provided with externally projecting means that cooperate with other of said elements to maintain said elements in their pre-arranged position after they are placed in a stacked relation on said dividing means to form the sloping grid over which the fluidized material will flow.
Claim 5
Dependent Claim
63 words
A multi-stage calciner apparatus as defined by claim 1 further defined by having means providing a pressurized jacket radially disposed about one of the superimposed stages formed in the cylinder with said jacket having open communication with said means for supplying a continuous flow of gas to said apparatus for pressurizing said jacket about said certain stage during the operation of the apparatus.
Claim 6
Dependent Claim
58 words
A multi-stage calciner apparatus as defined by claim 2 wherein said spherical elements are provided with externally projecting means that cooperate with other of said elements to maintain said elements in their pre-arranged position after they are placed in a stacked relation on said dividing means to form the sloping grid over which the fluidized materiaL will flow.
Claim 7
Dependent Claim
76 words
A multi-stage calciner apparatus as defined by claim 2 wherein said spherical elements are each provided with a laterally extending lugs which cooperates with the lug on other elements to maintain said elements in their pre-arranged position upon said inverted conical shelves and over said center openings provided thereby after they are placed in a stacked relationship with respect to one another so as to provide a sloping grid over which the fluidized material will flow.
Claim 8
Dependent Claim
63 words
A multi-stage calciner apparatus as defined by claim 2 further defined by having means providing a pressurized jacket radially disposed about one of the superimposed stages formed in the cylinder with said jacket having open communication with said means for supplying a continuous flow of gas to said apparatus for pressurizing said jacket about said certain stage during the operation of the apparatus.
Claim 9
Dependent Claim
145 words
A calciner apparatus for heating and freely transporting materials to be treated, over a sloping surfaced fluid grid, wherein the improvement comprises a. a chamber formed within the apparatus by an inverted conically shaped wall providing an opening at the depending vertex thereof, b. a pressurized annular section about said inverted conically shaped wall, c. means for pressurizing said section, d. a combustion chamber within said pressurized section and having open communication therewith and with said opening provided at the depending vertex of said wall, e. means for heating the atmosphere of said combustion chamber, f. a grid of ceramic balls of different diameters on said wall arranged to provide a sloping surface for the material heated and transported thereover, g. and a discharge means associated with the lowermost edge of said sloping surface grid through which the treated material is passed from said apparatus.
Claim 10
Dependent Claim
145 words
A calciner apparatus for heating and freely transporting materials to be treated, over a sloping surfaced fluid grid, wherein the improvement comprises a. a chamber formed within the apparatus by an inverted conically shaped wall providing an opening at the depending vertex thereof, b. a pressurized annular section about said inverted conically shaped wall, c. means for pressurizing said section, d. a combustion chamber within said pressurized section and having open communication therewith and with said opening provided at the depending vertex of said wall, e. means for heating the atmosphere of said combustion chamber, f. a grid of ceramic balls of different diameters on said wall arranged to provide a sloping surface for the material heated and transported thereover, g. and a discharge means associated with the lowermost edge of said sloping surface grid through which the treated material is passed from said apparatus.
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |