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US3661561A
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Method of making aluminum-silicon alloys
Assignee: Ethyl Corp
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Filing: 1970-08-03
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Granted: 1972-05-09
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Expires: 1990-08-03
Abstract
Abstract A method of making aluminum-silicon alloy in a blast furnace utilizing substantially pure oxygen, wherein lumps of silicon carbide comprise all or part of the furnace bed.
Inventors
- 👤 Frederick W Frey Jr
- 👤 Donald O Hutchinson
- 👤 Kishan K Seth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:05
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/02; C22C; C22C1/00; C22C1/02; C22C1/026
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
18 words
The method of claim 1, wherein the oxygen is preheated prior to being introduced into the blast furnace.
Claim 2
Dependent Claim
23 words
The method of claim 1, wherein the oxygen is preheated to a temperature of about 1,000* C. before introduction into the blast furnace.
Claim 3
Dependent Claim
22 words
The method of claim 1, wherein the oxygen is preheated to a temperature of from about 0* C. to about 2,000* C.
Claim 4
Dependent Claim
22 words
The method of claim 1, wherein the oxygen is preheated to a temperature of from about 500* C. to about 1,500* C.
Claim 5
Dependent Claim
12 words
The method of claim 1, wherein the alumina-silica ore is kyanite concentrate.
Claim 6
Dependent Claim
12 words
The method of claim 1, wherein the alumina-silica ore is diaspore clay.
Claim 7
Dependent Claim
11 words
The method of claim 1, wherein the alumina-silica ore is kaolinite.
Claim 8
Dependent Claim
36 words
The method of claim 1, wherein substantially the entire bed is composed of lumps of silicon carbide of an average size in ranges of about 1/4 inch in diameter to about 1 1/2 inches in diameter.
Claim 9
Dependent Claim
34 words
The method of claim 1, wherein substantially the entire bed is composed of lumps of silicon carbide which are substantially the same size as pellets of ore and carbon fed to the blast furnace.
Claim 10
Dependent Claim
19 words
The method of claim 1, in which the reaction temperature is between about 1,800* C. and about 2,500* C.
Claim 11
Dependent Claim
16 words
The method of claim 1, wherein the furnace bed comprises lumps of silicon carbide and coke.
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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 |