US3871632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modular divisible barrel-shaped shell for metallurgical furnaces
Assignee: ENGINEERED METAL PROD
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Filing: 1972-08-02
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Granted: 1975-03-18
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Expires: 1992-08-02
Abstract
Abstract The disclosed horizontally divisible furnace shell comprises a spherically shaped bottom section and truncated cone cover-like shaped middle and top wall sections stacked upon the bottom section, the form of the middle and top sections resulting in barrel-shaped shell walls. Each of the three modular sections has a metal casing with a refractory lining which may be made of firebrick or fireclay. Each wall section has an inwardly projecting ledge at its lower end for supporting the refractory lining. For interconnecting and aligning the sections, tapered locating pins and sockets are provided between all sections. Water-cooled flanges are preferably provided at the upper and lower ends of the top wall section. The joint between the middle and top wall sections is stepped upwardly adjacent the pouring spout so that such joint will be above the level of the molten metal, even when the furnace is tilted to pour out the metal. The middle wall section is provided with a molten metal discharge opening and a pouring spout extending outwardly beneath such opening. At least one slag discharge opening is formed in the middle and top wall sections. Modular removable water-cooled members are provided along the sides and the top of such slag discharge opening. A movable water-cooled heat resistant door is provided to close the slag discharge opening. Beneath the slag discharge opening, the middle wall section is provided with an apron which preferably has refractory material in the form of graphite blocks to prevent the slag from adhering to the apron. The bail for lifting and transporting the separate modular shell sections has a non-symmetrical shape and adjustable links, such shape being adapted to accommodate the middle and top wall sections, which have different lifting point locations and different centers of gravity. Using the lifting bail, the entire middle or top wall section, complete with its refractory lining, may then be lifted from the furnace or into place on the furnace. Thus, the worn-out refractory lining may be removed from the shell section, and the new lining may be installed when the wall section is dismounted from the furnace. It is preferred to provide spare wall sections so that they can be fitted with new refractory linings while the furnace is operating. The replacement of the used wall section or sections having worn-out refractory linings with the spare wall section or sections having new refractory linings may be performed quickly, with only a short shutdown of the furnace.
Inventors
- 👤 Edgar Wunsche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:14
CPC Classifications
F; F27; F27B; F27B3/00; F27B3/10; F27B3/12
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
158 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom section having a metal casing and a refractory lining, a first generally ring-shaped wall section removably mounted on top of said bottom section and having a metal casing and a refractory lining, and a second generally ring-shaped wall section removably mounted on top of said first wall section and having a metal casing and a refractory lining, each of said wall sections having means for supporting the refractory lining thereof when said wall section is dismounted from the furnace shell, whereby the refractory lining may be installed in each wall section prior to the mounting of the wall section on the furnace shell, said first wall section having an upper portion with an upward step adjacent one side of said first wall section, said second wall section having a correspondingly stepped lower portion to mate with the stepped upper portion of said first wall section.
Claim 2
Dependent Claim
158 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom section having a metal casing and a refractory lining, a first generally ring-shaped wall section removably mounted on top of said bottom section and having a metal casing and a refractory lining, and a second generally ring-shaped wall section removably mounted on top of said first wall section and having a metal casing and a refractory lining, each of said wall sections having means for supporting the refractory lining thereof when said wall section is dismounted from the furnace shell, whereby the refractory lining may be installed in each wall section prior to the mounting of the wall section on the furnace shell, said first wall section having an upper portion with an upward step adjacent one side of said first wall section, said second wall section having a correspondingly stepped lower portion to mate with the stepped upper portion of said first wall section.
Claim 3
Dependent Claim
218 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom section having a metal casing and a refractory lining, a first generally ring-shaped wall section removably mounted on top of said bottom section and having a metal casing and a refractory lining, and a second generally ring-shaped wall section removably mounted on top of said first wall section and having a metal casing and a refractory lining, each of said wall sections having means for supporting the refractory lining thereof when said wall section is dismounted from the furnace shell, whereby the refractory lining may be installed in each wall section prior to the mounting of the wall section on the furnace shell, said first wall section being formed with a pouring opening therein for the discharge of the molten metal from the furnace, said first wall section having a pouring spout extending outwardly therefrom opposite said pouring opening, said first wall section having an upper portion which is stepped upwardly adjacent said pouring spout, said second wall section having a correspondingly stepped lower portion to mate with the stepped upper portion of said first wall section whereby molten metal can be poured from said pouring spout without causing the molten metal to rise above the stepped joint between said first and second wall sections.
Claim 4
Dependent Claim
218 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom section having a metal casing and a refractory lining, a first generally ring-shaped wall section removably mounted on top of said bottom section and having a metal casing and a refractory lining, and a second generally ring-shaped wall section removably mounted on top of said first wall section and having a metal casing and a refractory lining, each of said wall sections having means for supporting the refractory lining thereof when said wall section is dismounted from the furnace shell, whereby the refractory lining may be installed in each wall section prior to the mounting of the wall section on the furnace shell, said first wall section being formed with a pouring opening therein for the discharge of the molten metal from the furnace, said first wall section having a pouring spout extending outwardly therefrom opposite said pouring opening, said first wall section having an upper portion which is stepped upwardly adjacent said pouring spout, said second wall section having a correspondingly stepped lower portion to mate with the stepped upper portion of said first wall section whereby molten metal can be poured from said pouring spout without causing the molten metal to rise above the stepped joint between said first and second wall sections.
Claim 5
Dependent Claim
200 words
A furnace shell for use with molten metal, COMPRISING a generally dish-shaped bottom section including a metal casing for receiving a refractory lining, a first generally ring-shaped wall section removably mounted on top of said bottom section and including a metal casing for receiving a refractory lining, said wall section having means for supporting a refractory lining therein when said wall section is dismounted from the furnace shell, whereby the refractory lining may be installed in said wall section prior to the mounting of the wall section on the furnace shell, and a second generally ring-shaped wall section removably mounted on top of said first wall section and including a metal casing for receiving a refractory lining, said first wall section being formed with a discharge opening through which the molten metal may be poured, said first wall section having an upwardly stepped upper portion adjacent said opening, said second wall section having a stepped lower portion to mate with said stepped upper portion of said first wall section whereby the joint between said first and second wall sections will remain above the level of the molten metal even when the furnace is tipped to pour out the molten metal.
Claim 6
Dependent Claim
200 words
A furnace shell for use with molten metal, COMPRISING a generally dish-shaped bottom section including a metal casing for receiving a refractory lining, a first generally ring-shaped wall section removably mounted on top of said bottom section and including a metal casing for receiving a refractory lining, said wall section having means for supporting a refractory lining therein when said wall section is dismounted from the furnace shell, whereby the refractory lining may be installed in said wall section prior to the mounting of the wall section on the furnace shell, and a second generally ring-shaped wall section removably mounted on top of said first wall section and including a metal casing for receiving a refractory lining, said first wall section being formed with a discharge opening through which the molten metal may be poured, said first wall section having an upwardly stepped upper portion adjacent said opening, said second wall section having a stepped lower portion to mate with said stepped upper portion of said first wall section whereby the joint between said first and second wall sections will remain above the level of the molten metal even when the furnace is tipped to pour out the molten metal.
Claim 7
Dependent Claim
155 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom section having a metal casing and a refractory lining, a first generally ring-shaped wall section removably mounted on top of said bottom section and having a metal casing and a refractory lining, and a second generally ring-shaped wall section removably mounted on top of said first wall section and having a metal casing and a refractory lining, said first wall section having a pouring opening therein for the discharge of the molten metal from the furnace, said first wall section having an upper portion which is stepped upwardly adjacent said pouring opening, said second wall section having a correspondingly stepped lower portion to mate with the stepped upper portion of said first wall section whereby molten metal can be poured from said pouring opening without causing the molten metal to rise above the stepped joint between said first and second wall sections.
Claim 8
Dependent Claim
155 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom section having a metal casing and a refractory lining, a first generally ring-shaped wall section removably mounted on top of said bottom section and having a metal casing and a refractory lining, and a second generally ring-shaped wall section removably mounted on top of said first wall section and having a metal casing and a refractory lining, said first wall section having a pouring opening therein for the discharge of the molten metal from the furnace, said first wall section having an upper portion which is stepped upwardly adjacent said pouring opening, said second wall section having a correspondingly stepped lower portion to mate with the stepped upper portion of said first wall section whereby molten metal can be poured from said pouring opening without causing the molten metal to rise above the stepped joint between said first and second wall sections.
Claim 9
Dependent Claim
156 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom section including a metal casing for receiving a refractory lining, a first generally ring-shaped wall section removably mounted on top of said bottom section and including a metal casing for receiving a refractory lining, and a second generally ring-shaped wall section removably mounted on top of said first wall section and including a metal casing for receiving a refractory lining, said first wall section being formed with a discharge opening through which the molten metal may be poured, said first wall section having an upwardly stepped upper portion adjacent said opening, said second wall section having a stepped lower portion to mate with said stepped upper portion of said first wall section whereby the joint between said first and second wall sections will remain above the level of the molten metal even when the furnace is tipped to pour out the molten metal.
Claim 10
Dependent Claim
156 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom section including a metal casing for receiving a refractory lining, a first generally ring-shaped wall section removably mounted on top of said bottom section and including a metal casing for receiving a refractory lining, and a second generally ring-shaped wall section removably mounted on top of said first wall section and including a metal casing for receiving a refractory lining, said first wall section being formed with a discharge opening through which the molten metal may be poured, said first wall section having an upwardly stepped upper portion adjacent said opening, said second wall section having a stepped lower portion to mate with said stepped upper portion of said first wall section whereby the joint between said first and second wall sections will remain above the level of the molten metal even when the furnace is tipped to pour out the molten metal.
Claim 11
Dependent Claim
113 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom section including a metal casing for receiving a refractory lining, a first generally ring-shaped wall section removably mounted on top of said bottom section and including a metal casing for receiving a refractory lining, and a second generally ring-shaped wall section removably mounted on top of said first wall section and including a metal casing for receiving a refractory lining, said first wall section having an upwardly stepped upper portion adjacent one side of said first wall section, said second wall section having a correspondingly stepped lower portion to mate with said stepped upper portion of said first wall section.
Claim 12
Dependent Claim
113 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom section including a metal casing for receiving a refractory lining, a first generally ring-shaped wall section removably mounted on top of said bottom section and including a metal casing for receiving a refractory lining, and a second generally ring-shaped wall section removably mounted on top of said first wall section and including a metal casing for receiving a refractory lining, said first wall section having an upwardly stepped upper portion adjacent one side of said first wall section, said second wall section having a correspondingly stepped lower portion to mate with said stepped upper portion of said first wall section.
Claim 13
Dependent Claim
130 words
A furnace shell for use with molten metal, comprising a generally Dish-shaped bottom wall portion, a generally ring-shaped side wall portion extending upwardly from said bottom wall portion, and a generally ring-shaped upper wall section removably mounted on top of said side wall portion, said side wall portion being formed with a discharge opening through which the molten metal may be poured, said side wall portion having an upwardly stepped upper portion adjacent said opening, said upper wall section having a stepped lower portion to mate with said stepped upper portion of said side wall portion whereby the joint between said side wall portion and said upper wall section will remain above the level of the molten metal even when the furnace is tipped to pour out the molten metal.
Claim 14
Dependent Claim
130 words
A furnace shell for use with molten metal, comprising a generally Dish-shaped bottom wall portion, a generally ring-shaped side wall portion extending upwardly from said bottom wall portion, and a generally ring-shaped upper wall section removably mounted on top of said side wall portion, said side wall portion being formed with a discharge opening through which the molten metal may be poured, said side wall portion having an upwardly stepped upper portion adjacent said opening, said upper wall section having a stepped lower portion to mate with said stepped upper portion of said side wall portion whereby the joint between said side wall portion and said upper wall section will remain above the level of the molten metal even when the furnace is tipped to pour out the molten metal.
Claim 15
Dependent Claim
84 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom wall portion, a generally ring-shaped side wall portion extending upwardly from said bottom wall portion, and a generally ring-shaped upper wall section removably mounted on top of said side wall portion, said side wall portion having an upwardly stepped upper portion adjacent one side of said side wall portion, said upper wall section having a correspondingly stepped lower portion to mate with said stepped upper portion of said side wall portion.
Claim 16
Dependent Claim
84 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom wall portion, a generally ring-shaped side wall portion extending upwardly from said bottom wall portion, and a generally ring-shaped upper wall section removably mounted on top of said side wall portion, said side wall portion having an upwardly stepped upper portion adjacent one side of said side wall portion, said upper wall section having a correspondingly stepped lower portion to mate with said stepped upper portion of said side wall portion.
Claim 17
Dependent Claim
127 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom wall portion, a generally ring-shaped side wall portion extending upwardly from said bottom wall portion, and an upper wall portion mounted on top of said side wall portion, said side wall portion being formed with a discharge opening through which the molten metal may be poured, said side wall portion having an upwardly stepped upper portion adjacent said opening, said upper wall portion having a stepped lower portion to mate with said stepped upper portion of said side wall portion whereby the joint between said side wall portion and said upper wall portion can remain above the level of the molten metal even when the furnace is tipped to pour out the molten metal.
Claim 18
Dependent Claim
127 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom wall portion, a generally ring-shaped side wall portion extending upwardly from said bottom wall portion, and an upper wall portion mounted on top of said side wall portion, said side wall portion being formed with a discharge opening through which the molten metal may be poured, said side wall portion having an upwardly stepped upper portion adjacent said opening, said upper wall portion having a stepped lower portion to mate with said stepped upper portion of said side wall portion whereby the joint between said side wall portion and said upper wall portion can remain above the level of the molten metal even when the furnace is tipped to pour out the molten metal.
Claim 19
Dependent Claim
78 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom portion, a side wall portion extending upwardly from said bottom wall portion, and an upper wall portion mounted on top of said side wall portion, said side wall portion having an upwardly stepped upper portion adjacent one side of said side wall portion, said upper wall portion having a correspondingly stepped lower portion to mate with said stepped upper portion of said side wall portion.
Claim 20
Dependent Claim
78 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom portion, a side wall portion extending upwardly from said bottom wall portion, and an upper wall portion mounted on top of said side wall portion, said side wall portion having an upwardly stepped upper portion adjacent one side of said side wall portion, said upper wall portion having a correspondingly stepped lower portion to mate with said stepped upper portion of said side wall portion.
Claim 21
Dependent Claim
153 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom portion including a metal casing with a refractory lining, a generally ring-shaped side wall portion extending upwardly from said bottom portion and including a metal casing with a refractory lining, and an upper generally ring-shaped wall portion mounted on top of said side wall portion and including a metal casing with a refractory lining, said side wall portion being formed with a discharge opening through which the molten metal may be poured, said side wall portion having an upwardly stepped upper portion adjacent said opening, said upper wall portion having a stepped lower portion to mate with said stepped upper portion of said side wall portion whereby the joint between said side wall portion and said upper wall portion will remain above the level of the molten metal even when the furnace is tipped to pour out the molten metal.
Claim 22
Dependent Claim
153 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom portion including a metal casing with a refractory lining, a generally ring-shaped side wall portion extending upwardly from said bottom portion and including a metal casing with a refractory lining, and an upper generally ring-shaped wall portion mounted on top of said side wall portion and including a metal casing with a refractory lining, said side wall portion being formed with a discharge opening through which the molten metal may be poured, said side wall portion having an upwardly stepped upper portion adjacent said opening, said upper wall portion having a stepped lower portion to mate with said stepped upper portion of said side wall portion whereby the joint between said side wall portion and said upper wall portion will remain above the level of the molten metal even when the furnace is tipped to pour out the molten metal.
Claim 23
Dependent Claim
106 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom portion including a metal casing with a refractory lining, a generally ring-shaped side wall portion extending upwardly from said bottom section and including a metal casing with a refractory lining, and an upper generally ring-shaped wall portion mounted on top of said side wall portion and including a metal casing with a refractory lining, SAID side wall portion having an upwardly stepped upper portion adjacent one side of said side wall portion, said upper wall portion having a stepped lower portion to mate with said stepped upper portion of said side wall portion.
Claim 24
Dependent Claim
106 words
A furnace shell for use with molten metal, comprising a generally dish-shaped bottom portion including a metal casing with a refractory lining, a generally ring-shaped side wall portion extending upwardly from said bottom section and including a metal casing with a refractory lining, and an upper generally ring-shaped wall portion mounted on top of said side wall portion and including a metal casing with a refractory lining, SAID side wall portion having an upwardly stepped upper portion adjacent one side of said side wall portion, said upper wall portion having a stepped lower portion to mate with said stepped upper portion of said side wall portion.
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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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |