US4422624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentrate burner
Assignee: Freeport Minerals Corp
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Filing: 1981-08-27
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Granted: 1983-12-27
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Expires: 2001-08-27
Abstract
Abstract A burner for smelting metal-bearing sulfide ores or concentrates by means of an oxygen-rich gas is disclosed. The oxygen-rich gas is introduced into a chamber so as to aspirate or eject the metal-bearing sulfide ore or concentrate. The oxygen-rich gas and sulfide concentrate are intimately admixed in a cylindrical mixing chamber and then jetted into the heated atmosphere of a smelting furnace.
Inventors
- 👤 H. E. Dunham
- 👤 David Arana
- 👤 Terrell D. Jackson
- 👤 Brent E. McEuen
- 👤 John A. Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:55
CPC Classifications
F; F23; F23D; F23D1/00; Y; Y02; Y02E; Y02E20/00; Y02E20/34
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
145 words
A sulfide concentrate burner particularly adapted for use in the flash smelting of sulfide concentrates in a reverberatory furnace comprising a cylindrical mixing chamber, a convexo-concave housing affixed to one end of said mixing chamber, an oxidizing gas feed pipe extending through said convexo-concave housing and into the central part of the concave portion thereof and aligned with the central axis of said mixing chamber, and at least one concentrate feed port located in said convexo-concave housing, said oxidizing gas feed pipe adapted to eject a jet of oxidizing gas into said mixing chamber and create a subatmospheric pressure within said convexo-concave housing whereby sulfide concentrate is aspirated from said concentrate feed port and mixed with said jet of oxidizing gas to produce at the end of said mixing chamber opposite said convexo-concave housing a jet comprising a mixture of oxidizing gas and sulfide concentrate.
Claim 2
Dependent Claim
145 words
A sulfide concentrate burner particularly adapted for use in the flash smelting of sulfide concentrates in a reverberatory furnace comprising a cylindrical mixing chamber, a convexo-concave housing affixed to one end of said mixing chamber, an oxidizing gas feed pipe extending through said convexo-concave housing and into the central part of the concave portion thereof and aligned with the central axis of said mixing chamber, and at least one concentrate feed port located in said convexo-concave housing, said oxidizing gas feed pipe adapted to eject a jet of oxidizing gas into said mixing chamber and create a subatmospheric pressure within said convexo-concave housing whereby sulfide concentrate is aspirated from said concentrate feed port and mixed with said jet of oxidizing gas to produce at the end of said mixing chamber opposite said convexo-concave housing a jet comprising a mixture of oxidizing gas and sulfide concentrate.
Claim 3
Dependent Claim
14 words
A concentrate burner as set forth in claim 1, wherein the housing is bell-shaped.
Claim 4
Dependent Claim
14 words
A concentrate burner as set forth in claim 1, wherein the housing is hemispherical.
Claim 5
Dependent Claim
26 words
A concentrate burner as set forth in claim 1, wherein the axis of the concentrate feed port intersects the axis of the oxidizing gas feed pipe.
Claim 6
Dependent Claim
23 words
A concentrate burner as set forth in claim 1, having, in addition, a water jacket surrounding the cylindrical wall of the mixing chamber.
Claim 7
Dependent Claim
22 words
A concentrate burner as set forth in claim 5, having, in addition, a closable clean-out port formed in the convexo-concave mixing chamber.
Claim 8
Dependent Claim
25 words
A concentrate burner as set forth in claim 6, wherein the axis of the clean-out port intersects the axis of the oxidizing gas feed pipe.
Claim 9
Dependent Claim
62 words
A concentrate burner as set forth in claim 6, wherein the oxidizing gas feed pipe extends into the central part of the concave portion of the convexo-concave housing a distance defined substantially by a plane normal to the axis of the oxidizing gas feed pipe and passing through the edge of the concentrate feed port which is closest to the mixing chamber.
Claim 10
Dependent Claim
34 words
A concentrate burner as set forth in claim 1, having, in addition, a converging nozzle mounted on the end of the oxidizing gas feed pipe located within the concave portion of the convexo-concave housing.
Claim 11
Dependent Claim
34 words
A concentrate burner as set forth in claim 1, having, in addition, a converging-diverging nozzle mounted on the end of the oxidizing gas feed pipe located within the concave portion of the convexo-concave housing.
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) | 1986-12-26 | 1987-06-27 | 1987-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-26 | 1991-06-27 | 1991-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-26 | 1995-06-27 | 1995-12-27 | $7700.00 | Window Closed / Lapsed |