US3637368A
Expired / Lapsed
US
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Increased metallizations of iron ore from fluidized bed processes
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1968-10-16
•
Granted: 1972-01-25
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Expires: 1988-10-16
Abstract
Abstract Improved iron ore metallizations are achieved by reducing the ore in fluidized processes, depositing carbon on the ore and then gasifying the carbon at low pressures.
Inventors
- 👤 Glyndwr A R Bessant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:02
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0086; C21B13/0033; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134; Y02P10/143
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
17 words
A process according to claim 1 wherein said carbon forming gas is A carbon monoxide containing gas.
Claim 2
Dependent Claim
35 words
The process of claim 1 wherein said carbon is deposited on the ore in a final ferrous reduction zone of a fluidized iron ore reduction process in amounts ranging at least about 1 wt. percent.
Claim 3
Dependent Claim
15 words
The process of claim 3 wherein said carbon is deposited by reversion of carbon monoxide.
Claim 4
Dependent Claim
23 words
The process of claim 1 wherein said pressure below about 3 atmospheres is maintained for a time ranging at least about 5 minutes.
Claim 5
Dependent Claim
38 words
The process of claim 1 wherein said pressure is lowered and maintained for a time ranging from about 15 minutes to about 2 hours below about 2 atmospheres at temperatures ranging about 1, 350* to about 1,600* F.
Claim 6
Dependent Claim
41 words
The process of claim 1 wherein said carbon is deposited in said final ferrous reduction zone of a fluidized iron ore reduction process in amounts ranging from about 1.5 to about 3 percent, based on weight of total reduced ore product.
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |