US3661562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactor and method of making aluminum-silicon alloys
Assignee: Ethyl Corp
•
Filing: 1970-12-07
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Granted: 1972-05-09
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Expires: 1990-12-07
Abstract
Abstract A reactor or blast furnace adapted for the production of an aluminum-silicon alloy, wherein two separate reaction zones are provided. Coke or other suitable carbonaceous material is fed into one reaction zone and a mixture of coke and alumina-silica ore is fed into the second reaction zone. Substantially pure oxygen, a supporter of combustion, is introduced into the reaction zone or section containing coke for combustion. Hot carbon monoxide gases produced by the coke combustion are introduced into the second reaction zone or section containing ore and coke for reducing the ore. A suitable opening is provided in the wall separating the two reaction zones for permitting the hot carbon monoxide to move from one reaction zone to the other. The reaction zone in which the ore is reduced includes a suitable tap-hole for drawing off of molten aluminum-silicon alloy.
Inventors
- 👤 Kishan K Seth
- 👤 Carroll W Lanier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:57
CPC Classifications
F; F27; F27B; F27B1/00; F27B1/02; F27B1/04; C; C22; C22B; C22B21/00; C22B21/02; C22C; C22C1/00; C22C1/02; C22C1/026
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
22 words
The process of claim 1, wherein the oxygen is preheated prior to being introduced into the first reaction zone of the furnace.
Claim 2
Dependent Claim
19 words
The process of claim 2, wherein the oxygen is preheated to a temperature of at least about 1,000 C.
Claim 3
Dependent Claim
21 words
The process of claim 2, wherein the oxygen is preheated to a temperature of about 0* C. to about 2,000* C.
Claim 4
Dependent Claim
22 words
The process of claim 2, wherein the oxygen is preheated to a temperature of from about 500* C. to about 1,500* C.
Claim 5
Dependent Claim
13 words
The process of claim 2, wherein the alumina-silica ore is a diaspore clay.
Claim 6
Dependent Claim
13 words
The process of claim 2, wherein the alumina-silica ore is a kyanite concentrate.
Claim 7
Dependent Claim
11 words
The process of claim 2, wherein the alumina-silica ore is kaolinite.
Claim 8
Dependent Claim
22 words
The process of claim 2, wherein carbon monoxide is removed from the second reaction zone and recycled into the first reaction zone.
Claim 9
Dependent Claim
22 words
The process of claim 2, wherein the reaction temperature in the first reaction zone is about 2,100* C. to about 2,500* C.
Claim 10
Dependent Claim
34 words
The method of claim 1, wherein the burden in the second reaction zone is supported on a bed comprising particles of silicon carbide which are substituted for all or part of the carbon bed.
Claim 11
Dependent Claim
54 words
The method of claim 1, wherein the burden in the second reaction zone is supported on a bed comprising particles of carbide selected from the group consisting of silicon carbide, zirconium carbide, titanium carbide, tantalum carbide, hafnium carbide and the like, which carbide particles are substituted for all or part of the carbon bed.
Claim 12
Dependent Claim
28 words
The method of claim 12, wherein said carbide is present in an amount sufficient to substantially prevent the formation of aluminum carbide and other carbides in harmful amounts.
Claim 13
Dependent Claim
40 words
The method of claim 1, wherein substantially the entire bed in the second reaction zone is comprised of lumps of silicon carbide of an average size ranging from about 1/4 inch in diameter to about 1 1/2 inches in diameter.
Claim 14
Dependent Claim
44 words
The method of claim 1, wherein substantially the entire bed in the second reaction zone is composed of lumps of silicon carbide which are substantially the same size as pellets of ore and carbon fed to the second reaction zone of the blast furnace.
Claim 15
Dependent Claim
25 words
The method of claim 1, wherein the reaction in the second reaction zone is carried out between about 1,800* C. and about 2, 500* C.
Claim 16
Dependent Claim
26 words
The method of claim 1, wherein the reaction in the second section of the blast furnace is carried out at a temperature of above 2,050* C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |