US4220469A
Expired / Lapsed
US
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Method for producing reduction gases consisting essentially of carbon monoxide and hydrogen
Assignee: Carl Still GmbH and Co KG
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Filing: 1978-08-04
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Granted: 1980-09-02
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Expires: 1998-08-04
Abstract
Abstract A single heat method of producing reduction gases which consist essentially of carbon monoxide and hydrogen for ore-reducing processes, comprises, directing a coal and water suspension into a reactor to generate combustion gases under pressure having a temperature in the range of from 1300° C. to 1500° C. and mixing the combustion gases immediately after they are formed with reduction furnace waste gases which have a temperature in the range of from 100° C. to 500° C. The mixed gases are then directed through a water seal separator to separate and quench slag particles and the slag particles are removed with water from the gas stream. The pressure gases are mixed with the waste gases in a proportion of from 1:0.5 to 1:2.0. The resultant gases after purification and hydrogen sulfide scrubbing are directed back into the ore-reducing process and the quenched slag particles are fused to larger size agglomerates and are carried out of the gas stream and taken up in water.
Inventors
- 👤 Kurt Tippmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:09
CPC Classifications
C; C10; C10J; C10J3/00; C10J3/46; C10J3/48; C10J3/485; C10J3/52; C10J3/526; C10J3/72; C10J3/74; C10J3/78; C10J3/82; C10J3/84; C10J3/845; C21; C21B; C21B13/00; C21B13/0073; C21B5/00; C21B5/06; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/0953; C10J2300/0959; C10J2300/0973; C21B2100/00; C21B2100/20; C21B2100/26; C21B2100/40; C21B2100/42; C21B2100/60; C21B2100/64; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134; Y02P10/25
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
133 words
A single heat method of producing reduction gases consisting essentially of carbon monoxide and hydrogen for ore-reducing processes, comprising, burning a coal and water suspension with oxygen in a reactor to generate combustion gases under pressure having a temperature in the range of from 1300° C. to 1500° C., mixing the combustion gases immediately after they are formed with reduction furnace waste gases having a temperature of from 100° C. to 500° C. to form mixed gases having temperatures lower than the combustion gases, and to quench slag particles out of said combustion gases, directing said mixed gases through a solid matter to separate residual solid matter and to form purified mixed gases, scrubbing the purified mixed gases of H 2 S, and directing said scrubbed, purified mixed gases to a reduction furnace.
Claim 2
Dependent Claim
133 words
A single heat method of producing reduction gases consisting essentially of carbon monoxide and hydrogen for ore-reducing processes, comprising, burning a coal and water suspension with oxygen in a reactor to generate combustion gases under pressure having a temperature in the range of from 1300° C. to 1500° C., mixing the combustion gases immediately after they are formed with reduction furnace waste gases having a temperature of from 100° C. to 500° C. to form mixed gases having temperatures lower than the combustion gases, and to quench slag particles out of said combustion gases, directing said mixed gases through a solid matter to separate residual solid matter and to form purified mixed gases, scrubbing the purified mixed gases of H 2 S, and directing said scrubbed, purified mixed gases to a reduction furnace.
Claim 3
Dependent Claim
29 words
A single heat method, as claimed in claim 1, wherein the combustion gases are mixed with the reduction furnace waste gases in a proportion of from 1:0.5 to 1:2.0
Claim 4
Dependent Claim
41 words
A single heat method, as claimed in claim 1, wherein the combustion gases and the waste gases from the reduction furnace are mixed in a proportion to provide a temperature of from 800° C. to 1000° C. for the mixed gases.
Claim 5
Dependent Claim
36 words
A single heat method, as claimed in claim 1, wherein the reduction furnace waste gases are first subjected to a deep dusting to remove the dust particles therefrom before they are mixed with the combustion gases.
Claim 6
Dependent Claim
24 words
A single heat method, as claimed in claim 1, wherein the combustion gases are formed at a pressure of between 5 and 10 bars.
Claim 7
Dependent Claim
51 words
A single heat method, as claimed in claim 1, wherein said combustion gases and reduction furnace waste gases are mixed over a reservoir of water whereby said quenched slag particles drop into said water, and further comprising the step of removing said slag particles with said water from the mixed gases.
Claim 8
Dependent Claim
43 words
A single heat method, as claimed in claim 6, wherein said combustion gases are mixed with said reducing furnace waste gases in a proportion between 1:0.5 to 1:20 to provide said mixed gases in a temperature range of 800° C. to 1000° C.
Claim 9
Dependent Claim
24 words
A single heat method, as claimed in claim 7, wherein said combustion gases are formed at a pressure ranging between 5 and 10 bar.
References Cited (Backward Citations)
US3853538A
Cited
US4066420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-02 | 1984-03-03 | 1984-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-02 | 1988-03-03 | 1988-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-02 | 1992-03-03 | 1992-09-02 | $7700.00 | Window Closed / Lapsed |