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US4566903A
Expired / Lapsed
US
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Method for the pyrometallurgical treatment of fine grained solids to produce molten products
Assignee: Kloeckner Humboldt Deutz AG
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Filing: 1984-10-03
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Granted: 1986-01-28
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Expires: 2004-10-03
Abstract
Abstract A method and apparatus for the pyrometallurgical treatment of fine grained solids such as non-ferrous metal ore concentrates with an oxygen-containing gas wherein the solids are mixed with the gas to form a suspension which is blown through a nozzle into a reaction chamber such as a vertical melting cyclone. In the reaction chamber, the solids are brought to reaction and melted. The invention is concerned with injecting a particle stream through the reaction zone as a focused open jet having mass flow velocity of greater than 50 kg/m 2 .sec and having a linear speed of more than 35 m/sec. The particle stream is ignited by the hot combustion gases thereof or by a pilot flame. In a preferred embodiment of the invention, the particle stream is directed along a horizontal secant of the chamber to the opposite wall.
Inventors
- 👤 Gerhard Melcher
- 👤 Friedrich Megerle
- 👤 Wolfgang Wuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:47
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0026; C22B15/0028; C22B15/0047; C22B5/00; C22B5/02; C22B5/12; C22B5/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
142 words
In a method for the pyrometallurgical treatment of fine grained products which yield molten products at elevated temperatures upon treatment with oxygen which includes the steps of: mixing said fine grained product with an oxygen-containing gas to form a suspension, and blowing said suspension through a nozzle into a vertical melting cyclone where the solids are caused to react and are melted into a high mass flow velocity and high temperature stream, the improvement which comprises: injecting said stream into said melting cyclone as a focused open particle jet having a mass flow velocity greater than 50 kg/m 2 ·sec and a linear velocity greater than 35 m/sec such that the particle jet forms a generally horizontal secant to the cyclone circumference in spaced relation to the inside wall of said cyclone; and igniting said particle stream as it enters said cyclone.
Claim 2
Dependent Claim
142 words
In a method for the pyrometallurgical treatment of fine grained products which yield molten products at elevated temperatures upon treatment with oxygen which includes the steps of: mixing said fine grained product with an oxygen-containing gas to form a suspension, and blowing said suspension through a nozzle into a vertical melting cyclone where the solids are caused to react and are melted into a high mass flow velocity and high temperature stream, the improvement which comprises: injecting said stream into said melting cyclone as a focused open particle jet having a mass flow velocity greater than 50 kg/m 2 ·sec and a linear velocity greater than 35 m/sec such that the particle jet forms a generally horizontal secant to the cyclone circumference in spaced relation to the inside wall of said cyclone; and igniting said particle stream as it enters said cyclone.
Claim 3
Dependent Claim
17 words
A method according to claim 1 wherein said fine grained product is a non-ferrous metal ore concentrate.
Claim 4
Dependent Claim
17 words
A method according to claim 1 wherein said stream is ignited by its own hot combustion gases.
Claim 5
Dependent Claim
15 words
A method according to claim 1 wherein said stream is ignited by a pilot flame.
Claim 6
Dependent Claim
33 words
A method according to claim 1 which includes suspending said particles in an air stream containing up to 40% oxygen, and injecting an additional oxygen-enriched air stream about the nozzle discharging said suspension.
Claim 7
Dependent Claim
28 words
A method according to claim 1 which includes the step of: increasing the linear velocity of the particle stream as said oxygen-containing gas has a decreased oxygen content.
Claim 8
Dependent Claim
35 words
A method according to claim 1 wherein: said particle stream strikes a melt film at the inside wall of said cyclone with a high jet force at the side of said cyclone opposite said nozzle.
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) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |