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US3753681A
Expired / Lapsed
US
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Beneficiation of vanadium-containing materials
Assignee: Continental Ore Corp
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Filing: 1970-10-01
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Granted: 1973-08-21
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Expires: 1990-10-01
Abstract
Abstract A process for the beneficiation of vanadium-containing materials comprising preheating the material in the absence of oxygen and then reacting the hot material with oxygen to yield soluble vanadium compounds. This Application for a patent is a continuation-in-part of my earlier U.S. Pat. application Ser. No. 755,431 filed on Aug. 26, 1968, and now abandoned.
Inventors
- 👤 M Vojkovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:07
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/20; C22B34/22
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
31 words
The process of claim 1, wherein the maximum temperature reached by the slag while it is in contact with the oxygen being within the range of from 680* to 1,050* C.
Claim 2
Dependent Claim
26 words
The process of claim 2, wherein the maximum temperature reached by the slag while it is in contact with the oxygen does not exceed 950* C.
Claim 3
Dependent Claim
23 words
The process of claim 2, wherein the temperature to which the ground slag is preheated under inert conditions is at least 630* C.
Claim 4
Dependent Claim
20 words
The process of claim 1, wherein sodium carbonate is incorporated with the material prior to its being contacted with oxygen.
Claim 5
Dependent Claim
24 words
The process of claim 1, wherein the slag is ground to -36 mesh (B.S.S.), corresponding to a maximum particle diameter of approximately 420 micronS.
Claim 6
Dependent Claim
35 words
The process of claim 1, wherein the vanadium-containing material is vanadium-containing titaniferous ore and the temperature to which the material is preheated under inert conditions is within the range of from 800* to 1,000* C.
Claim 7
Dependent Claim
34 words
The process of claim 1, wherein the vanadium-containing material is fly ash and the temperature to which the material is preheated under inert conditions is within the range of from 400* to 700* C.
Claim 8
Dependent Claim
14 words
The process of claim 1, wherein the material is ground to -100 mesh (B.S.S.).
Claim 9
Dependent Claim
53 words
The process of claim 1, wherein, after the vanadium-containing material has been contacted with oxygen to effect the formation of soluble vanadium compounds, the vanadium-containing material is ground and then reacted with oxygen for a second time at an elevated temperature to effect the formation of a further quantity of soluble vanadium compounds.
Claim 10
Dependent Claim
60 words
The process of claim 10, wherein, after the vanadium-containing material has been ground, it is preheated under inert conditions to a temperature of at least 400* C. prior to its being contacted with oxygen for a second time the temperature of the preheated material when it is initially contacted with oxygen for the second time being at least 400* C.
Claim 11
Dependent Claim
89 words
The process of claim 1, wherein the vanadium-containing material is ferrophosphorus and, after the ferrophosphorus has been contacted with oxygen to effect the formation of soluble vanadium compounds, it is ground, basic vanadium-containing slag is incorporated with it, it is preheated under inert conditions, and then it is contacted with oxygen for a second time to effect the formation of a further quantity of soluble vanadium compounds the temperature of the preheated material when it is initially contacted with oxygen for the second time being at least 400* C.
Claim 12
Dependent Claim
46 words
The process of claim 1, wherein, after the material has been contacted with oxygen for the first time, or, when the material is contacted with oxygen for a second time, after the material has been contacted with oxygen for the second time, the material is quenched.
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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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |