US3612499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for heat treatment of fine material
Assignee: ThyssenKrupp Industrial Solutions AG
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Filing: 1969-12-15
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Granted: 1971-10-12
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Expires: 1989-12-15
Abstract
Abstract The apparatus comprises a rotary kiln, an intermediate chamber which is connected to the discharge end of the kiln and is arranged to receive fired material therefrom, and which extends a substantial distance below the discharge end of the kiln, so as to hold a column of substantial height of material discharged from the kiln, and apparatus for discharging air under pressure in a zone in the lower portion of a column of material in the chamber. A duct for conveying the material by air entrainment to a cooling zone, has its inlet in the zone in which the air is discharged in the lower portion of the column, and a conduit is provided for conducting to the rotary kiln air discharged from the cooling zone. The column of material in the chamber serves as a seal between the rotary kiln and the zone in which the air is discharged in the lower portion of the column.
Inventors
- 👤 Paul Oelde Weber
- 👤 Gerhard Butschko Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:10
CPC Classifications
F; F27; F27D; F27D15/00; F27D15/02; F27D15/0206; B; B65; B65G; B65G53/00; B65G53/04; B65G53/06; B65G53/34; B65G53/60; F27B; F27B7/00; F27B7/20; F27B7/38; F27B7/383; B65G2812/00; B65G2812/16; B65G2812/1608; B65G2812/1641
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
180 words
Apparatus for heat treatment of fine material, comprising a rotary kiln, a duct for conveying to a cooling zone, by air entrainment, material which has been heat treated in the kiln, and a conduit for conducting to the rotary kiln air discharged from the cooling zone, wherein the improvement comprises an intermediate chamber which has its upper portion connected to the discharge end of the rotary kiln and is arranged to receive fired material therefrom, and apparatus for discharging air under pressure at a point in the lower portion of the intermediate chamber, the inlet of the duct for conveying material being located adjacent to such point, and the intermediate chamber being of such vertical length as to extend a substantial distance below the discharge end of the rotary kiln, so as to hold a column of substantial height of material discharged from the kiln, and being of such shape that the column of material in the chamber forms a seal between the rotary kiln and the zone in which air is discharged in the lower portion of the chamber.
Claim 2
Dependent Claim
180 words
Apparatus for heat treatment of fine material, comprising a rotary kiln, a duct for conveying to a cooling zone, by air entrainment, material which has been heat treated in the kiln, and a conduit for conducting to the rotary kiln air discharged from the cooling zone, wherein the improvement comprises an intermediate chamber which has its upper portion connected to the discharge end of the rotary kiln and is arranged to receive fired material therefrom, and apparatus for discharging air under pressure at a point in the lower portion of the intermediate chamber, the inlet of the duct for conveying material being located adjacent to such point, and the intermediate chamber being of such vertical length as to extend a substantial distance below the discharge end of the rotary kiln, so as to hold a column of substantial height of material discharged from the kiln, and being of such shape that the column of material in the chamber forms a seal between the rotary kiln and the zone in which air is discharged in the lower portion of the chamber.
Claim 3
Dependent Claim
36 words
Apparatus according to claim 1 wherein the inlet of the duct for conveying material by air entrainment is arranged approximately above the point at which air is discharged in the lower portion of the intermediate chamber.
Claim 4
Dependent Claim
34 words
Apparatus according to claim 1 wherein the cooling zone comprises a plurality of cyclone separators connected in series, and the duct for conveying material by entrainment discharges into a conduit connecting two cyclone separators.
Claim 5
Dependent Claim
16 words
Apparatus according to claim 1, wherein a porous false bottom is provided in the intermediate chamber.
References Cited (Backward Citations)
US2861353A
Cited
US3203681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |