US3669436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for preheating scrap
Assignee: American Waagner-Biro Co Inc
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Filing: 1970-04-14
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Granted: 1972-06-13
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Expires: 1990-04-14
Abstract
Abstract An apparatus for operating furnaces in metal-treating plants. The furnaces require a charge made up at least in part of scrap metal. The scrap metal is preheated prior to reaching the furnace, either by making use of special burners or by utilizing waste heat which is available in the plant. The scrap in a suitable container is preheated and then delivered in this condition to the furnace so that the extent to which heat must be supplied in the furnace itself is reduced.
Inventors
- 👤 Roland Kemmetmueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:54
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/56; C21C5/562; C21C5/565; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S266/00; Y10S266/901
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
159 words
In a metal-treating plant, a furnace for receiving a charge at least part of which is scrap metal, container means for containing scrap metal and admitting heat thereto, support means for supporting said container means at a preheating station, heating means located at said station for delivering heat to scrap in the container means, and transporting means coacting with said container means for delivering scrap in preheated condition to the furnace, said container means being in an upright position at said preheating station and in said upright position having a top open end and a bottom end formed with openings through which heat from said heating means has access to scrap in said container means, said transporting means coacting with said container means, not only for removing the latter with preheated scrap therein from said support means but also for placing said container means at an attitude where the scrap will fall out through said top open end thereof.
Claim 2
Dependent Claim
159 words
In a metal-treating plant, a furnace for receiving a charge at least part of which is scrap metal, container means for containing scrap metal and admitting heat thereto, support means for supporting said container means at a preheating station, heating means located at said station for delivering heat to scrap in the container means, and transporting means coacting with said container means for delivering scrap in preheated condition to the furnace, said container means being in an upright position at said preheating station and in said upright position having a top open end and a bottom end formed with openings through which heat from said heating means has access to scrap in said container means, said transporting means coacting with said container means, not only for removing the latter with preheated scrap therein from said support means but also for placing said container means at an attitude where the scrap will fall out through said top open end thereof.
Claim 3
Dependent Claim
25 words
The combination of claim 1 and wherein said container means has an insulated wall means extending between said bottom end and said top end thereof.
Claim 4
Dependent Claim
23 words
The combination of claim 2 and wherein said insulated wall means includes an outer metal wall and an inner lining of fire-resistant material.
Claim 5
Dependent Claim
22 words
The combination of claim 2 and wherein said insulated wall means includes inner and outer walls defining an air space between themselves.
Claim 6
Dependent Claim
90 words
The combination of claim 4 and wherein said outer wall of said container means is formed with openings adjacent said bottom and top ends of said container means while the top end of said air space is closed so that air will flow upwardly through said air space between said inner and outer walls into said air space through said outer wall openings adjacent said bottom end of said container means and out of said air space through said outer wall openings adjacent the top end of said container means.
Claim 7
Dependent Claim
110 words
In a metal-treating plant, a furnace for receiving a charge at least part of which is scrap metal, container means for containing scrap metal and admitting heat thereto, support means for supporting said container means at a preheating station, heating means located at said station for delivering heat to scrap in the container means, and transporting means coacting with said container means for delivering scrap in preheated condition to the furnace, said suPport means at said preheating station including a rotary turret for simultaneously supporting a plurality of said container means which are respectively at different stages between initial and final preheating of scrap within the plurality of container means.
Claim 8
Dependent Claim
110 words
In a metal-treating plant, a furnace for receiving a charge at least part of which is scrap metal, container means for containing scrap metal and admitting heat thereto, support means for supporting said container means at a preheating station, heating means located at said station for delivering heat to scrap in the container means, and transporting means coacting with said container means for delivering scrap in preheated condition to the furnace, said suPport means at said preheating station including a rotary turret for simultaneously supporting a plurality of said container means which are respectively at different stages between initial and final preheating of scrap within the plurality of container means.
Claim 9
Dependent Claim
97 words
The combination of claim 6 and wherein said heating means includes a source of heat situated below that one of said plurality of container means which is at a final preheating stage for directly heating scrap in said one container means, and said heating means including duct means extending from the top of said one container means to the bottom end of another container means which has not yet reached said final preheating stage for directing to said other container means heated air which has already given up some heat to scrap in said one container means.
Claim 10
Dependent Claim
27 words
The combination of claim 7 and wherein said heating means includes an additional source of heat situated below said other container means for additionally heating scrap therein.
Claim 11
Dependent Claim
30 words
The combination of claim 7 and wherein said duct means has a vertical portion extending through a central region of said rotary turret and around which said rotary turret turns.
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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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |