Patent US2995455A successfully refreshed from Google Patents.
US2995455A
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Method of recovering nickel and iron from laterite ores by preferential reduction
Assignee: Tohoku Denki Seitetsu KK
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Filing: 1958-06-25
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Granted: 1961-08-08
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Expires: 1978-06-25
Abstract
No abstract record available.
Inventors
- 👤 Uemura Michio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:07
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/32; C22; C22B; C22B23/00; C22B23/02; C22B23/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
IN THE RECOVERY OF NICKEL AND IRON FROM LATERITE ORE BY PREFERNTIAL REDUCTION BY SMELTING THE LATERITE ORE, ADMIXED WITH AN ALKALI METAL HALID, A FLUX AND A CARBONACEOUS REDUCING MATERIAL, A METHOD OF MANUFACTURING ALUMINA CEMENT FROM MOLTEN SLAG OF THE MELTED ORE RESIDUE, WHICH COMPRISES THE STEPS OF BLOWING COMPRESSED AIR OF 2 TO 3 CUBIC METER AT N.T.P. PER MINUTE PER TON OF SLAG ON THE SURFACE OF MOLTEN SLAG AT 1300 TO 1400*C. FORMED IN THE SMELTING OF IRON FROM THE MELTED ORE RESIDUE, ADMIXED WITH 15 TO 30% BY WEIGHT OF FLUX AND 10 TO 30% BY WEIGHT OF HIGH ALUMINA SUBSTANCE, FOR 5 TO 10 MINUTES TO BLOW THE SLAG AND OXIDIZE A SLIGHT AMOUNT OF IMPURITIES CAS, CAC2 AIN AND FEO IN THE SLAT, AND MAINTAINING THE SLAG AT A TEMPERATURE RANGING FROM 1000 TO 700*C. FOR ABOUT 1 HOUR, AFTER WHICH THE SLAG IS COOLED NATURALLY AND THEN PULVERIZED BY THE USUAL MANNER.
Claim 2
Dependent Claim
161 words
IN THE RECOVERY OF NICKEL AND IRON FROM LATERITE ORE BY PREFERNTIAL REDUCTION BY SMELTING THE LATERITE ORE, ADMIXED WITH AN ALKALI METAL HALID, A FLUX AND A CARBONACEOUS REDUCING MATERIAL, A METHOD OF MANUFACTURING ALUMINA CEMENT FROM MOLTEN SLAG OF THE MELTED ORE RESIDUE, WHICH COMPRISES THE STEPS OF BLOWING COMPRESSED AIR OF 2 TO 3 CUBIC METER AT N.T.P. PER MINUTE PER TON OF SLAG ON THE SURFACE OF MOLTEN SLAG AT 1300 TO 1400*C. FORMED IN THE SMELTING OF IRON FROM THE MELTED ORE RESIDUE, ADMIXED WITH 15 TO 30% BY WEIGHT OF FLUX AND 10 TO 30% BY WEIGHT OF HIGH ALUMINA SUBSTANCE, FOR 5 TO 10 MINUTES TO BLOW THE SLAG AND OXIDIZE A SLIGHT AMOUNT OF IMPURITIES CAS, CAC2 AIN AND FEO IN THE SLAT, AND MAINTAINING THE SLAG AT A TEMPERATURE RANGING FROM 1000 TO 700*C. FOR ABOUT 1 HOUR, AFTER WHICH THE SLAG IS COOLED NATURALLY AND THEN PULVERIZED BY THE USUAL MANNER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |