US3992193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal powder production by direct reduction in an arc heater
Assignee: Westinghouse Electric Corp
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Filing: 1975-03-10
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Granted: 1976-11-16
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Expires: 1995-03-10
Abstract
Abstract A process for the production of metal powder from an ore by direct reduction in an arc heater characterized by the steps of introducing a finely divided ore into an arc heated plasma gas to effect reduction of the ore to small liquid droplets of elemental metal in a reducing atmosphere and quenching the metal droplets to form solid metal powder, the metal having a melting point of not more than the temperature of the chemical reduction reaction, such metal being iron, chromium, vanadium, manganese, cobalt or nickel.
Inventors
- 👤 Maurice G. Fey
- 👤 Edna A. Dancy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:01
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/20; C22B34/22; B; B22; B22F; B22F9/00; B22F9/16; B22F9/18; B22F9/20; B22F9/22; C21; C21B; C21B13/00; C21B13/12; C21B13/125; C22B23/00; C22B23/02; C22B34/30; C22B34/32; C22B4/00; C22B4/005; C22B47/00; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A process for producing metal powder by direct reduction of an ore, comprising the steps of: a. introducing a finely divided ore consisting essentially of an oxide of the metal into an arc heated plasma gas to effect reduction of the oxide to elemental liquid metal droplets, the elemental metal having a melting point of not more than the temperature of the chemical reduction reaction, and b. quenching the elemental metal droplets by expansion through a nozzle, the nozzle being located at the exit end of the reaction zone.
Claim 2
Dependent Claim
89 words
A process for producing metal powder by direct reduction of an ore, comprising the steps of: a. introducing a finely divided ore consisting essentially of an oxide of the metal into an arc heated plasma gas to effect reduction of the oxide to elemental liquid metal droplets, the elemental metal having a melting point of not more than the temperature of the chemical reduction reaction, and b. quenching the elemental metal droplets by expansion through a nozzle, the nozzle being located at the exit end of the reaction zone.
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) | 1979-11-16 | 1980-05-17 | 1980-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-16 | 1984-05-17 | 1984-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-16 | 1988-05-17 | 1988-11-16 | $7700.00 | Window Closed / Lapsed |