US3813196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for manufacture of a powder by atomizing a stream of molten metal
Assignee: Stora Enso Oyj
•
Filing: 1973-01-18
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Granted: 1974-05-28
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Expires: 1993-01-18
Abstract
Abstract A device is provided for atomizing a molten metal stream whereby a first jet of an atomizing fluid is directed to a molten metal and a second jet is directed to the combined stream of the molten metal and first jet of atomizing fluid; the second jet impinges the combined stream at a certain angular relationship to the molten metal stream; as a result of the specific arrangement of the jets embodied in particular nozzles and their orientation, a fine, very uniform powder is obtained which consists of smooth, substantially spherical particles; the device is operational without any substantial splash-back and the amount of molten metal which may be atomized on basis of the fluid for operating of the jets constitutes an advantageous aspect of the device.
Inventors
- 👤 S Backstrom
- 👤 P Hellman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:24
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; B22F9/082; B22F2009/088
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
192 words
A device for atomizing molten material by disintegration of a stream of molten material with fluid jets of inert gas directed under high pressure against the stream of molten material characterized in that it comprises a casting tundish provided with at least one casting opening and two slit nozzles arranged parallel to each other, one on each side of the casting opening, the first nozzle and the first jet being greater in length than said casting opening and so directed in relation to the centre axis of the casting opening that the centre plane of the slit forms an angle of 30* to 60* with this axis, whereas the second nozzle and second jet being wider than the layer of molten material immediately before the intersection with this jet is directed so that it centre plane forms an angle of 25* to 60* with the centre plane of the first nozzle, and that the centre line of the casting opening intersects the centre plane of the first nozzle at a distance from the intersection of the planes with each other, which is not less than twice the diameter of the casting opening.
Claim 2
Independent Claim
192 words
A device for atomizing molten material by disintegration of a stream of molten material with fluid jets of inert gas directed under high pressure against the stream of molten material characterized in that it comprises a casting tundish provided with at least one casting opening and two slit nozzles arranged parallel to each other, one on each side of the casting opening, the first nozzle and the first jet being greater in length than said casting opening and so directed in relation to the centre axis of the casting opening that the centre plane of the slit forms an angle of 30* to 60* with this axis, whereas the second nozzle and second jet being wider than the layer of molten material immediately before the intersection with this jet is directed so that it centre plane forms an angle of 25* to 60* with the centre plane of the first nozzle, and that the centre line of the casting opening intersects the centre plane of the first nozzle at a distance from the intersection of the planes with each other, which is not less than twice the diameter of the casting opening.
Claim 3
Dependent Claim
38 words
A device according to claim 1, characterized in that at least one of the slit nozzles has saw-tooth slits or consists of a plurality of part-slits, arranged successively, inclined in relation to the centre plane of the slit.
Claim 4
Dependent Claim
28 words
A device according to claim 1, characterized in that each of the nozzles comprises two parts and that the slits are formed in the joint between these parts.
Claim 5
Dependent Claim
21 words
A device according to claim 1, characterized in that the outlet openings of the slits enlarge from a narrow interior section.
Claim 6
Dependent Claim
41 words
A device as claimed in claim 1, in which the casting opening (5) has an elliptical cross-sectional area and is oriented so that the long axis of the ellipse is parallel with the outlet openings of the atomizing nozzles (6, 7).
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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |