Patent US4088824A successfully refreshed from Google Patents.
US4088824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric furnace station noise and smoke pollution control system
Assignee: Obenchain Corp
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Filing: 1976-11-08
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Granted: 1978-05-09
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Expires: 1996-11-08
Abstract
Abstract A pollution control system for an electric furnace station which provides for noise abatement and the collection and discharge of pollutant gases during charging, refining and tapping stages of electric furnace operations. A housing surrounds the electric furnace which is sized so as to enable tilting of the furnace during tapping, the housing having movable sections to enable entry of charging means for the furnace and entry of personnel, with an exhaust means in the upper region of the housing. In addition, a tapping shield is provided having a supplementary exhaust system to remove pollutant gases during tapping and additive deposition. Air curtain or other means are provided to preclude escape of pollutants during charging of the furnace through the charging means.
Inventors
- 👤 Raymond J. Bonistalli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:53
CPC Classifications
F; F27; F27D; F27D17/00; F27D17/30; F27D17/304; C; C21; C21C; C21C5/00; C21C5/52; C21C5/5294; F27D3/00; F27D3/18; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
232 words
In an electric arc furnace station having a tiltable, top-chargeable electric furnace with associated electrodes and a rotatable top with means for charging the furnace, said furnace having a pour spout and means for collecting refined metal from the station, and a housing covering the top and sides of the furnace, the height thereof sufficient to contain the furnace and associated electrodes in raised or lowered position, the width thereof sufficient to enable rotating of the furnace roof during charging thereof and tilting of the furnace and electrodes during tapping, means for noise abatement and for collecting and conveying pollutant gases during charging, meltdown, refining and tapping of the furnace comprising: movable sections on said housing to enable entry thereto of charging means for the furnace comprising first entry means in the upper section of the housing for entry of cables adapted to support a charging bucket and further entry means for entrance into said housing of said charging bucket and of operating personnel; exhaust means proximate the upper area of the housing to remove gases therefrom during charging, meltdown, refining and tapping; and an air curtain apparatus adjacent said first entry means, arranged to direct a flow of dirty air from within said housing transversely across said first entry and toward said exhaust means while cables supporting a charging bucket extend through said first entry means during charging of the furnace.
Claim 2
Dependent Claim
232 words
In an electric arc furnace station having a tiltable, top-chargeable electric furnace with associated electrodes and a rotatable top with means for charging the furnace, said furnace having a pour spout and means for collecting refined metal from the station, and a housing covering the top and sides of the furnace, the height thereof sufficient to contain the furnace and associated electrodes in raised or lowered position, the width thereof sufficient to enable rotating of the furnace roof during charging thereof and tilting of the furnace and electrodes during tapping, means for noise abatement and for collecting and conveying pollutant gases during charging, meltdown, refining and tapping of the furnace comprising: movable sections on said housing to enable entry thereto of charging means for the furnace comprising first entry means in the upper section of the housing for entry of cables adapted to support a charging bucket and further entry means for entrance into said housing of said charging bucket and of operating personnel; exhaust means proximate the upper area of the housing to remove gases therefrom during charging, meltdown, refining and tapping; and an air curtain apparatus adjacent said first entry means, arranged to direct a flow of dirty air from within said housing transversely across said first entry and toward said exhaust means while cables supporting a charging bucket extend through said first entry means during charging of the furnace.
Claim 3
Dependent Claim
32 words
In an electric arc furnace station as defined in claim 1, the improvement wherein supplementary exhaust means are provided adjacent the tapping site to exhaust gases during the tapping of the furnace.
Claim 4
Dependent Claim
246 words
In an electric arc furnace station having a tiltable, top-chargeable electric furnace with associated electrodes and a rotatable top with means for charging the furnace, said furnace having a pour spout and means for eollecting refined metal from the station, and a housing covering the top and sides of the furnace, the height thereof sufficient to contain the furnace and associated electrodes in raised or lowered position, the width thereof sufficient to enable rotating of the furnace roof during charging thereof and tilting of the furnace and electrodes during tapping, means for noise abatement and for collecting and conveying pollutant gases during charging, meltdown, refining and tapping of the furnace comprising: movable sections on said housing to enable entry thereto of charging means for the furnace comprising first entry means in the upper section of the housing for entry of cables adapted to support a charging bucket and further entry means for entrance into said housing of said charging bucket and of operating personnel; exhaust means proximate the upper area of the housing to remove gases therefrom during charging, meltdown, refining and tapping; an air curtain apparatus adjacent said first entry means, arranged to direct a flow of dirty air from within said enclosure transversely across said entry and towards said exhaust means while cables supporting a charging bucket extend through said first entry means during charging of the furnace; and supplementary exhaust means adjacent the tapping site to exhaust gases during tapping of the furnace.
Claim 5
Dependent Claim
246 words
In an electric arc furnace station having a tiltable, top-chargeable electric furnace with associated electrodes and a rotatable top with means for charging the furnace, said furnace having a pour spout and means for eollecting refined metal from the station, and a housing covering the top and sides of the furnace, the height thereof sufficient to contain the furnace and associated electrodes in raised or lowered position, the width thereof sufficient to enable rotating of the furnace roof during charging thereof and tilting of the furnace and electrodes during tapping, means for noise abatement and for collecting and conveying pollutant gases during charging, meltdown, refining and tapping of the furnace comprising: movable sections on said housing to enable entry thereto of charging means for the furnace comprising first entry means in the upper section of the housing for entry of cables adapted to support a charging bucket and further entry means for entrance into said housing of said charging bucket and of operating personnel; exhaust means proximate the upper area of the housing to remove gases therefrom during charging, meltdown, refining and tapping; an air curtain apparatus adjacent said first entry means, arranged to direct a flow of dirty air from within said enclosure transversely across said entry and towards said exhaust means while cables supporting a charging bucket extend through said first entry means during charging of the furnace; and supplementary exhaust means adjacent the tapping site to exhaust gases during tapping of the furnace.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |