Patent US20020002384A1 successfully refreshed from Google Patents.
Patent US3634592A successfully refreshed from Google Patents.
US3634592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for charging electric-arc furnaces
Assignee: Huettenwerk Oberhausen AG
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Filing: 1970-10-16
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Granted: 1972-01-11
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Expires: 1990-10-16
Abstract
Abstract An electric-arc furnace for the smelting and refining of sponge iron has respective electrodes each connected to one phase of the polyphase output of a transformer. The sponge iron is fed to a distributor at a rate determined by the total electrical power consumption of all of the electrodes and is distributed into the furnace through charging doors adjacent each electrode by a compartmented distributor, the capacity of the compartments of which is adjustable in accordance with the electrical consumption of the respective electrical phase. The distributor is a circular receptacle having angularly equispaced openings, each connected via a duct with a charging door, and vanes internally subdividing the receptacle to distribute the sponge iron between the openings in a proportion determined by the angular positions of the vanes. The vanes are adjustable within limits in accordance with the consumption of electrical energy of each electrode.
Inventors
- 👤 Heinz-Dieter Pantke
- 👤 Ulrich Pohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:30
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/52; C21C5/527; F; F27; F27D; F27D3/00; F27D3/18; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
110 words
An electric-furnace installation comprising an electric-arc furnace having a plurality of electrodes; a polyphase electric source having a respective electrical phase connected to each of said electrodes; charging means including a metering device for delivering sponge iron to said furnace and a distributing device receiving sponge iron from said metering device and distributing same to selected locations of the furnace associated with said electrodes; and control means responsive to the power consumption input to said source for controlling said metering device and in response to the individual power consumptions at said electrodes for adjusting said distributing device to regulate the proportion of sponge iron delivered to each of said locations.
Claim 2
Dependent Claim
110 words
An electric-furnace installation comprising an electric-arc furnace having a plurality of electrodes; a polyphase electric source having a respective electrical phase connected to each of said electrodes; charging means including a metering device for delivering sponge iron to said furnace and a distributing device receiving sponge iron from said metering device and distributing same to selected locations of the furnace associated with said electrodes; and control means responsive to the power consumption input to said source for controlling said metering device and in response to the individual power consumptions at said electrodes for adjusting said distributing device to regulate the proportion of sponge iron delivered to each of said locations.
Claim 3
Dependent Claim
14 words
The installation defined in claim 1 wherein said metering device is a weighing conveyor.
Claim 4
Dependent Claim
48 words
The installation defined in claim 1 wherein said distributing device comprises an upwardly open receptacle of circular-plan configuration and a plurality of upright radial partitions subdividing the interior of said receptacle into sectors of variable compass, each of said sectors communicating with a respective one of said locations.
Claim 5
Dependent Claim
36 words
THe installation defined in claim 3, further comprising respective discharge funnels below each of said sectors, said locations being provided with charging openings in said furnace, said funnels and said openings being connected by respective ducts.
Claim 6
Dependent Claim
24 words
The installation defined in claim 4, further comprising means for angularly shifting said vanes in response to the power consumption at an associated electrode.
Claim 7
Dependent Claim
14 words
The installation defined in claim 5 wherein the last-mentioned means includes a feedback loop.
Claim 8
Dependent Claim
31 words
The installation defined in claim 5, further comprising conveying means between said metering device and said distributing device and operable at a rate in excess of that of said metering device.
Claim 9
Dependent Claim
25 words
The installation defined in claim 7, further comprising a scattering member adjustably rotatable in said receptacle for uniformly dispersing the sponge iron to said sectors.
Claim 10
Dependent Claim
33 words
The installation defined in claim 8 wherein said charging means is provided upon a support swingable about an axis offset from said furnace to clear the same and afford access to said electrodes.
Claim 11
Dependent Claim
14 words
The installation defined in claim 9 wherein said conveying means is an oscillating conveyor.
References Cited (Backward Citations)
US3472649A
Cited
US3518350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |