US3799367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discharge system for a shaft-type furnace
Assignee: Thyssen Niederrhein AG
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Filing: 1973-02-20
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Granted: 1974-03-26
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Expires: 1993-02-20
Abstract
Abstract A discharge system for a shaft-type furnace comprising a table supporting a column of furnace charge at the base of the shafttype furnace for the direct reduction of iron ore to produce sponge iron, a discharge device on this table being horizontally reciprocable to carry hot sponge iron alternately to one side and the opposite side of the table and expells the sponge iron into discharge openings provided at the opposite sides of the table. The sponge iron cascades through downwardly extending shafts or chutes of each opening, which, in turn, open downwardly into respective intermediate bins, the latter opening into dispensing hoppers which communicate via compensating connectors (e.g. bellows), with transport vessels or the like for the storage or further treatment of the sponge-iron. The transport vessel is provided with a system for flushing the interior with a nonoxidizing gas and the discharge hopper or bellows, is provided an outlet for the flushing gas. Between the bin and the hopper and between the discharge shaft and the bin, flap-type closures are provided to hermetically seal the respective openings.
Inventors
- 👤 R Grewer
- 👤 U Pohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:57
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0086; F; F27; F27B; F27B1/00; F27B1/10; F27B1/21; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
184 words
A discharge system for a shaft-type furnace, comprising: discharge means at the base of said furnace for dislodging quantities of sponge iron from a column of charge in said furnace in alternate directions; a respective discharge-shaft member communicating with and extending downwardly from said discharge means at opposite sides thereof for guiding respective quantities of sponge iron downwardly; a respective intermediate-bin member communicating with each of said discharge-shaft members at the bottom thereof for receiving quantities of sponge iron traversing said dischargeshaft members; a respective discharge-hopper member communicating with each of said discharge-bin members at the bottom thereof for discharging quantities of sponge iron into respective vessels disposed beneath the discharge hopper members; respective compensating connectors adjustably mounted between each of said discharge-hopper members and the respective vessel and sealingly engageably therewith; closure means between at least one of said members and another member communicating therewith for sealing same against passage of gas; and means for flushing each of said vessels and at least the compeNsating connector communicating therewith with a gas adapted to exclude air from said vessel and the associated compensating connector.
Claim 2
Dependent Claim
184 words
A discharge system for a shaft-type furnace, comprising: discharge means at the base of said furnace for dislodging quantities of sponge iron from a column of charge in said furnace in alternate directions; a respective discharge-shaft member communicating with and extending downwardly from said discharge means at opposite sides thereof for guiding respective quantities of sponge iron downwardly; a respective intermediate-bin member communicating with each of said discharge-shaft members at the bottom thereof for receiving quantities of sponge iron traversing said dischargeshaft members; a respective discharge-hopper member communicating with each of said discharge-bin members at the bottom thereof for discharging quantities of sponge iron into respective vessels disposed beneath the discharge hopper members; respective compensating connectors adjustably mounted between each of said discharge-hopper members and the respective vessel and sealingly engageably therewith; closure means between at least one of said members and another member communicating therewith for sealing same against passage of gas; and means for flushing each of said vessels and at least the compeNsating connector communicating therewith with a gas adapted to exclude air from said vessel and the associated compensating connector.
Claim 3
Dependent Claim
35 words
The discharge system defined in claim 1 wherein the last-mentioned means includes a gas inlet formed on said vessel and a gas outlet formed on one of said discharge-hopper member and the respective compensating connector.
Claim 4
Dependent Claim
42 words
The discharge system defined in claim 2 wherein said one of said members has a downwardly convergent lower end extending into said members and formed with a seat, a said closure means including a flap-type closure element sealingly engageable with said seat.
Claim 5
Dependent Claim
27 words
The discharge system defined in claim 3 wherein said one of said members is said discharge-shaft member and said other of said members is said intermediate-bin member.
Claim 6
Dependent Claim
27 words
The discharge system defined in claim 3 wherein said one of said members is said intermediate-bin member and said other of said members is said discharge-hopper member.
Claim 7
Dependent Claim
28 words
The discharge system defined in claim 3 wherein said element has a spheroidal surface, further comprising means for swivelably supporting said element for self-centering engagement with said seat.
Claim 8
Dependent Claim
31 words
The discharge system defined in claim 3 wherein said compensating connector is formed at its lower end with a connecting flange adapted to sealingly surround an opening formed in said vessel.
Claim 9
Dependent Claim
113 words
The discharge system defined in claim 1 wherein said discharge means includes a support table underlying and carrying said column, a discharge plate reciprocable on said table for alternately entraining said material in opposite directions into the respective discharge-shaft members, a housing enclosing said plate and the bottom of said column, a tension rod fixed to said plate and extending out of said housing, a packing body slidably receiving said rod and spaced from said housing, means floatingly mounting said packing body on said housing for at least limited relative displacement of said packing body and said housing, and activating means connected to said rod beyond said packing body for shifting said plate.
Claim 10
Dependent Claim
116 words
The discharge system defined in claim 8 wherein a pair of such rods are affixed to said plate on one side thereof and respective packing bodies are slidably engaged by said rods, said activating means including a traverse connecting said rods beyond said packing bodies, a piston-and-cylinder arrangement pivotally connected to said traverse for displacing same, rollers on said traverse, and a horizontal guide surface extending from said housing, said rollers bearing upon said guide surface, said compensating means including a bellows affixed to each of said packing bodies, a dust tube extending into the respective bellows, and a body of elastically deformable insulation filling space between each of said bellows and the respective dust tube.
Claim 11
Dependent Claim
117 words
The discharge system defined in claim 1 wherein said closure means includes an annular seat formed between said one of said members and said other member, a pivot shaft extending generally parallel to the plane of said seat and offset to a side thereof, an arm swingably mounted on said pivot shaft and extending generally radially therefrom while having a free end juxtaposed with said seat in at least one position of said arm, a pin mounted on said arm and extending generally perpendicular thereto, a closure member swivelably mounted on said pin and engageable with said seat in said direction, said seat and said closure member having complementary engaging surfaces conforming to a surface of revolution.
Claim 12
Dependent Claim
104 words
The discharge system defined in claim 10 wherein said seat is formed with a concave sealing surface, said closure member is formed with a convex sealing surface engageably with said concave sealing surface, said seat is formed with a coolant channel and means for passing a coolant through said channel, said closure member is formed with a cooling channel and means including the interiors of said pivot shaft and said arm for passing cooling gluid through said cooling channel, said arm being provided with a pin having a ball-shaped head, said closure member being formed with a generally spheroidal socket mounted on said head.
Claim 13
Dependent Claim
41 words
The discharge system defined in claim 1 wherein one such closure means is provided between each said discharge-shaft member and the respective intermediate-bin member and another such closure means is provided between each said intermediate-bin member and the respective discharge-hopper member.
References Cited (Backward Citations)
US1807807A
Cited
US3090593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |