US3737153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molten metal holding furnace system
Assignee: Lectromelt Corp
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Filing: 1971-10-01
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Granted: 1973-06-05
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Expires: 1991-10-01
Abstract
Abstract A furnace vessel comprises a vertically oriented refractory lined cylindrical metal shell and a cover. The interior bottom of the vessel is dished and there are circumferentially spaced orifices through the wall of the vessel at the edge of the dish. A channeled molten metal receiving spout connects with one of the orifices and a pouring spout connects with the other. A riser on the receiving spout permits pouring metal into the vessel even when it is tilted for discharging metal from the pouring spout. The tilting axis of the vessel is on a side thereof, and, if extrapolated, the axis will pass through the tip of the pouring spout in which case the tip will not ascend or descend appreciably when the vessel is tilted. The vessel is adapted for holding, reducing, alloying, degassing, vacuum treatment and introducing additives to molten metal during the interval between melting and utilization of the metal. The argon-oxygen stainless steel refining process can also be carried out in the vessel. Continuous casting machinery is also furnished with molten metal from the vessel. The temperature of the metal in the furnace is maintained by heat radiated from an electrically resistive graphite rod which extends across the interior of the furnace above the metal level.
Inventors
- 👤 T Steffora
- 👤 E Schempp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:02
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/62; H05B3/64; B; B22; B22D; B22D11/00; B22D11/10; C; C21; C21C; C21C7/00; C21C7/10; F; F27; F27B; F27B14/00; F27B14/02; F27D; F27D11/00; F27D11/02; F27D3/00; F27D3/18
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
204 words
Holding furnace apparatus adapted to concurrently receive, hold and utilize molten metal comprising: a. a tiltable molten metal holding furnace including a cover and a metal shell having a refractory lining therein, said shell and lining having at least two orifices, b. means mounting said fuRnace for tilting on a horizontal axis that lies outside of said shell, c. a receiving spout and a pouring spout each of which is connected to and extends generally angularly upwardly from said shell and each of which has a molten metal conducting channel which aligns respectively with an orifice in said shell, d. said pouring spout having a channeled tip which is in proximity with said tilting axis, e. said receiving spout having a normally vertical extension and a channel portion, the tilting axis of said furnace extending through said receiving spout and the aforesaid tip of said pouring spout, the molten metal receiving channel in said vertical extension terminating at a level which is above said tip and above said orifices, whereby molten metal may be admitted to said furnace through said receiving spout when said furnace is tilted for discharge of metal from said pouring spout without atmospheric air entering said furnace through said orifices.
Claim 2
Dependent Claim
204 words
Holding furnace apparatus adapted to concurrently receive, hold and utilize molten metal comprising: a. a tiltable molten metal holding furnace including a cover and a metal shell having a refractory lining therein, said shell and lining having at least two orifices, b. means mounting said fuRnace for tilting on a horizontal axis that lies outside of said shell, c. a receiving spout and a pouring spout each of which is connected to and extends generally angularly upwardly from said shell and each of which has a molten metal conducting channel which aligns respectively with an orifice in said shell, d. said pouring spout having a channeled tip which is in proximity with said tilting axis, e. said receiving spout having a normally vertical extension and a channel portion, the tilting axis of said furnace extending through said receiving spout and the aforesaid tip of said pouring spout, the molten metal receiving channel in said vertical extension terminating at a level which is above said tip and above said orifices, whereby molten metal may be admitted to said furnace through said receiving spout when said furnace is tilted for discharge of metal from said pouring spout without atmospheric air entering said furnace through said orifices.
Claim 3
Dependent Claim
34 words
The invention set forth in claim 1 wherein: a. said pouring spout tip lies in a horizontal plane which is parallel with and substantially coincident with a horizontal plane that includes said tilting axis.
Claim 4
Dependent Claim
16 words
a hinge element to which the other end of said bolt means is in slidable engagement,
Claim 5
Dependent Claim
16 words
a hinge element to which the other end of said bolt means is in slidable engagement,
Claim 6
Dependent Claim
19 words
link means having one end on a fixed pivot and another end pivotally connected with said hinge element, and
Claim 7
Dependent Claim
19 words
link means having one end on a fixed pivot and another end pivotally connected with said hinge element, and
Claim 8
Dependent Claim
60 words
The invention set forth in claim 1 wherein: a. the refractory bottom of said furnace is generally dish shaped, said dish shaped bottom having a riser wall extending chordally thereof, the said orifices being respectively adjacent opposite ends of said riser wall, said riser wall preventing residual molten metal from accumulating away from said orifices when said furnace is tilted.
Claim 9
Dependent Claim
86 words
The invention set forth in claim 1 wherein: a. said shell and refractory lining have at least a pair of opposed and aligned apertures at a level above the intended maximum level of molten metal in the furnace, b. an electrical connector means mounted in proximity with each of said apertures and in sealing engagement with said furnace shell, each of said connector means being adapted to engage an opposite end of an electrically resistive heating rod which may extend across the interior of the furnace.
Claim 10
Dependent Claim
11 words
spring means interposed between said hinge element and said bolt means,
Claim 11
Dependent Claim
11 words
spring means interposed between said hinge element and said bolt means,
Claim 12
Dependent Claim
43 words
said hinge element being movable in selectively opposite directions to fold said link and bolt means for retracting said carriage means and to substantially align said link and bolt means and compress said spring for urging said carriage means toward said furnace means.
Claim 13
Dependent Claim
43 words
said hinge element being movable in selectively opposite directions to fold said link and bolt means for retracting said carriage means and to substantially align said link and bolt means and compress said spring for urging said carriage means toward said furnace means.
Claim 14
Dependent Claim
86 words
The invention set forth in claim 4 including: a. a carriage means associated with each electrical connector means and supporting said connector means, b. track means extending away from opposite sides, respectively, of said furnace in directions that are substantially perpendicular to the tilting axis of the furnace, said track means each supporting its associated carriage for selective movement perpendicular to said tilting axis, whereupon said carriage means may be translated for withdrawal or replacement of a resistive heating rod that is engageable by said connectors.
Claim 15
Dependent Claim
57 words
The invention set forth in claim 5 wherein: a. each of the opposed track means comprises a substantially stationary section and another section which is fastened to said furnace shell, said other sections supporting their associated carriage means during normal furnace operation and said other sections being tiltable with said furnace means independently of said stationary sections.
Claim 16
Dependent Claim
31 words
The invention set forth in claim 5 including: a. a toggle mechanism adapted to restrain said carriage means toward said furnace and to retract said carriage means therefrom, said mechanism comprising:
Claim 17
Dependent Claim
68 words
The invention set forth in cLaim 1 including: a. at least two refractory lined troughs positioned adjacent said holding furnace, said troughs each having a molten metal receiving end and a molten metal discharge end, the discharge ends of said troughs being positioned above said receiving spout extension whereby to permit pouring molten metal from alternate sources into said receiving spout by way of either of said troughs.
Claim 18
Dependent Claim
65 words
The invention set forth in claim 1 including: a. a receptacle for receiving and storing a charge of molten metal from said holding furnace, said receptacle having a metal receiving opening over which said pouring spout tip extends, said tip turning in said opening substantially on said holding furnace tilting axis, whereupon said tip will not ascend or descend significantly when said furnace is tilted.
Claim 19
Dependent Claim
54 words
The invention set forth in claim 1 wherein: a. said pouring spout tip is adapted to extend over the tundish of a continuous casting machine, said tip being disposed substantially coincident with said furnace tilting axis so as to not ascend or descend significantly with respect to the tundish when said furnace is tilted.
References Cited (Backward Citations)
US3416781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |