US3630353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for separation of fines from hot broken sinter
Assignee: Dravo Corp
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Filing: 1969-03-26
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Granted: 1971-12-28
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Expires: 1989-03-26
Abstract
Abstract The invention is directed to the removal of granular fines or dust from broken sinter cake, before delivery thereof to a blast furnace, by subjecting the broken cake, during passage from the sinter breakers to the cooling area, to a pressurized upward blast of air which carries the sinter fines through an exhaust hood and suitable conveyor conduit into a precipitator which removes the fines for return to the sinter machine and discharges the air to the atmosphere.
Inventors
- 👤 Horst Seidel
- 👤 Fred Cappel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:50
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
152 words
A method for dry classification of crushed hot sinter as received from a conventional sintering machine, comprising the steps of: feeding the crushed sinter cake in the absence of prior screening onto a conventional rotating cooling device having a perforated sinter carrying surface, blowing a blast of pressurized air upwardly through the bottom of the perforated surface of said cooling device for displacement of sinter fines thereon while retaining the remaining of said crushed sinter on said surface, collecting the air blast and suspended fines therein from above the top surface of said perforated surface of said cooling device and discharging same into a suitable precipitator to separate the fines from said air blast, continuously withdrawing the air from the upper portion of the precipitator, and collectiNg the separated fines from the bottom of said precipitator and returning them to the moving sintering machine for incorporation into the sintering cake forming thereon.
Claim 2
Independent Claim
152 words
A method for dry classification of crushed hot sinter as received from a conventional sintering machine, comprising the steps of: feeding the crushed sinter cake in the absence of prior screening onto a conventional rotating cooling device having a perforated sinter carrying surface, blowing a blast of pressurized air upwardly through the bottom of the perforated surface of said cooling device for displacement of sinter fines thereon while retaining the remaining of said crushed sinter on said surface, collecting the air blast and suspended fines therein from above the top surface of said perforated surface of said cooling device and discharging same into a suitable precipitator to separate the fines from said air blast, continuously withdrawing the air from the upper portion of the precipitator, and collectiNg the separated fines from the bottom of said precipitator and returning them to the moving sintering machine for incorporation into the sintering cake forming thereon.
Claim 3
Dependent Claim
29 words
The method as defined in claim 1, wherein said air blast is under a pressure of 4 to 32 inches W.C. of pressure, preferably 20 to 24 inches W.C.
Claim 4
Dependent Claim
33 words
The process as defined in claim 1 wherein said sinter fines displaced from the sinter layer by said air blast are less than one-eighth inch, preferably less than one thirty-second inch in size.
References Cited (Backward Citations)
US2874484A
Cited
US3161485A
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US3309787A
Cited
US3374998A
Cited
US3381948A
Cited
US3313534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |