Patent US3853535A successfully refreshed from Google Patents.
US3853535A
Expired / Lapsed
US
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Process for the comminution of particulate alluminaceous materials
Assignee: Individual
•
Filing: 1973-12-14
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Granted: 1974-12-10
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Expires: 1993-12-14
Abstract
Abstract Particulate aluminaceous materials employed in the manufacture of aluminum, such as aluminaceous ores or intermediates, are comminuted prior to the extraction of aluminum therefrom, by soaking the material in an alkaline or acidic electrolyte for a period of from about 0.2 to about 24 hours without the need for stirring and other agitation, whereby the structure of the particulate material becomes loosened, and then completing the comminution by subjecting the particulate material to primarily shearing forces until the average particle size of the material is under 1 mm.
Inventors
- 👤 Nee Mogyorosi K Szabo
- 👤 J Banhidy
- 👤 F Lazar
- 👤 M Ormossy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:35
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/04; C01F7/06; C01F7/0613; C22; C22B; C22B1/00; C22B21/00; C22B21/0007
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
70 words
A PROCESS FOR COMMINUTION OF PARTICULATE ALUMINACEOUS STARTING MATERIALS, WHICH COMPRISES BEFORE OR AFTER COARSE CRUSHING SOAKING SAID STARTING MATERIAL IN AN ALKALINE OR ACIDIC ELECTROLYTE FOR A PERIOD OF FROM ABOUT 0.2 TO ABOUT 24 HOURS THEREBY TO LOOSEN THE STRUCTURE OF THE PARTICLES, AND COMPLETING THE COMMINUTION BY SUBJECTING THE PARTICULATE MATERIAL TO PREDOMINANTLY SHEARING FORCES UNTIL THE AVERAGE PARICLES SIZEOF THE MATERIAL IS REDUCED TO UNDER 1MM.
Claim 2
Dependent Claim
70 words
A PROCESS FOR COMMINUTION OF PARTICULATE ALUMINACEOUS STARTING MATERIALS, WHICH COMPRISES BEFORE OR AFTER COARSE CRUSHING SOAKING SAID STARTING MATERIAL IN AN ALKALINE OR ACIDIC ELECTROLYTE FOR A PERIOD OF FROM ABOUT 0.2 TO ABOUT 24 HOURS THEREBY TO LOOSEN THE STRUCTURE OF THE PARTICLES, AND COMPLETING THE COMMINUTION BY SUBJECTING THE PARTICULATE MATERIAL TO PREDOMINANTLY SHEARING FORCES UNTIL THE AVERAGE PARICLES SIZEOF THE MATERIAL IS REDUCED TO UNDER 1MM.
Claim 3
Dependent Claim
40 words
The process of claim 1, wherein the average particle size of the starting material is from about 10 mm to about 30 mm, and said starting material is either a precrushed ore or an intermediate in the manufacture of aluminum.
Claim 4
Dependent Claim
29 words
The process of claim 1, wherein said step of soaking is carried out in a pipeline while the starting material is being transported from one processing location to another.
Claim 5
Dependent Claim
16 words
The process of claim 2, wherein the maximum temperature of the soaking electrolyte is about 120*C.
Claim 6
Dependent Claim
19 words
The process of claim 1, wherein said step of completing the comminution is carried out with a grinding pump.
Claim 7
Dependent Claim
19 words
The process of claim 2, wherein said step of completing the comminution is carried out with a grinding pump.
Claim 8
Dependent Claim
50 words
The process of claim 2, wherein the starting material is a bauxite having an average particle size of from about 20 to about 30 mm, and wherein said step of soaking is carried out for a period from about 0.5 to about 2.5 hours in a caustic sodium aluminate solution.
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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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |