US4464198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and process for the treatment of molten metal
Assignee: International Meehanite Metal Co Ltd
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Filing: 1983-01-17
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Granted: 1984-08-07
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Expires: 2003-01-17
Abstract
Abstract A treatment unit is disclosed which comprises a pouring bush (1) opening directly or indirectly into an additive container (3) holding a reactive additive such as a nodularizing agent and which has an aperture at the top of its peripheral walls (7c) and optionally one or more other apertures (7) in its peripheral walls to allow the passage therethrough of molten metal. The additive container is housed within a covered jacket or funnel (4) for restricting contact of molten metal being treated with the atmosphere. The aperture at the top of the peripheral walls of the additive container may be in the form of an annular gap (7b) between the top of the additive container and either the bottom of the pouring bush or a cover provided for the funnel or jacket.
Inventors
- 👤 Geoffrey Mannion
- 👤 Patrick V. Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:24
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
117 words
An apparatus for the treatment of molten metal, said apparatus comprising: (a) an additive container means for receiving molten metal and holding an additive to be added to the molten metal upon contact between the molten metal and the additive, said additive container means including at least one aperture in the top thereof; (b) a pouring bush for receiving molten metal, said pouring bush being positioned such that it opens into said additive container means; and (c) housing means for housing said additive container means and for containing the molten metal after it exits from said additive container means through said at least one aperture, said housing means preventing contact between the molten metal and the atmosphere.
Claim 2
Independent Claim
117 words
An apparatus for the treatment of molten metal, said apparatus comprising: (a) an additive container means for receiving molten metal and holding an additive to be added to the molten metal upon contact between the molten metal and the additive, said additive container means including at least one aperture in the top thereof; (b) a pouring bush for receiving molten metal, said pouring bush being positioned such that it opens into said additive container means; and (c) housing means for housing said additive container means and for containing the molten metal after it exits from said additive container means through said at least one aperture, said housing means preventing contact between the molten metal and the atmosphere.
Claim 3
Dependent Claim
23 words
An apparatus as set forth in claim 1, wherein said additive container means includes at least one aperture in the peripheral walls thereof.
Claim 4
Dependent Claim
18 words
A treatment unit according to claim 1, wherein the additive container means is supported by said housing means.
Claim 5
Dependent Claim
25 words
A treatment unit according to claim 1 or 2, wherein the additive container means is surrounded by a refractory body containing at least one aperture.
Claim 6
Dependent Claim
20 words
A treatment unit according to claim 1, wherein the pouring bush is attached to or integral with a furnace launder.
Claim 7
Dependent Claim
13 words
A treatment unit according to claim 1, which further comprises a pouring ladle.
Claim 8
Dependent Claim
123 words
A process for the treatment of molten metal by the introduction of a solid reactive additive said process comprising the steps of placing the solid reactive additive in a container which has an aperture at the top of its peripheral walls and at least one other aperture in its peripheral walls, passing molten metal to be treated via a pouring bush into contact with the reactive additive in the container wherein the metal reacts with the additive, allowing the metal containing the additive to flow through the apertures in the container into a pouring ladle positioned beneath the additive container, wherein contact of the molten metal being treated with the atmosphere is restricted by means of a covered housing means housing the container.
Claim 9
Dependent Claim
123 words
A process for the treatment of molten metal by the introduction of a solid reactive additive said process comprising the steps of placing the solid reactive additive in a container which has an aperture at the top of its peripheral walls and at least one other aperture in its peripheral walls, passing molten metal to be treated via a pouring bush into contact with the reactive additive in the container wherein the metal reacts with the additive, allowing the metal containing the additive to flow through the apertures in the container into a pouring ladle positioned beneath the additive container, wherein contact of the molten metal being treated with the atmosphere is restricted by means of a covered housing means housing the container.
Claim 10
Dependent Claim
21 words
A process according to claim 7, wherein the molten metal is cast iron and the reactive additive is a nodularizing agent.
Claim 11
Independent Claim
39 words
An apparatus as set forth in claims 1 or 2, wherein said aperture in the top of said additive container means includes a gap between the top of said additive container means and the bottom of said pouring bush.
Claim 12
Dependent Claim
15 words
An apparatus as set forth in claim 1, wherein said housing means includes a funnel.
Claim 13
Dependent Claim
16 words
An apparatus as set forth in claim 1, wherein said housing means includes a covered jacket.
Claim 14
Dependent Claim
20 words
An apparatus as set forth in claim 3, wherein said housing means includes a refractory material having a predetermined shape.
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) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |