US2930604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidized bed roasting of metal sulfide concentrates
Assignee: Glencore Canada Corp
•
Filing: 1954-04-30
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Granted: 1960-03-29
•
Expires: 1974-04-30
Abstract
No abstract record available.
Inventors
- 👤 Philip G Thornhill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:34
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/08; B01J8/12; C; C22; C22B; C22B1/00; C22B1/02; C22B1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
IN APPARATUS FOR THE FLUIDIZED BED ROASTING OF METAL SULFIDE CONCENTRATES AND THE LIKE, THE COMBUSTION COMPRISING AN INSULATED CHAMBER, A TRANSVERSE PERFORATED HEARTH AT THE LOWER PORTION OF THE CHAMBER, A WIND BOX BELOW THE HEARTH INTO WHICH AIR MAY BE INTRODUCED TO PASS UPWARDLY THROUGH THE PERFORATED HEARTH INTO OVERLYING MATERIAL TO FLUIDIZE THE SAME, AN INLET FOR THE INTRODUCTION OF A METAL SULFIDE SLURRY INTO AN UPPER PORTION OF THE CHAMBER, A CALCINE DISCHARGE LOCATED ABOVE THE PERFORATED HEARTH TO MAINTAIN ON SAID HEARTH A FLUIDIZED BED OF MATERIAL OF A PERDETERMINED DEPTH, THE DISTANCE BETWEEN THE LEVEL OF THE METAL SULFIDE SLURRY INLET AND THE LEVEL OF THE CALCINE DISCHARGE BEING AT LEAST ABOUT ELEVEN AND ONE-HALF FEET AND SUCH, WITH RESPECT TO THE CHARACTERISTICS OF THE SLURRY, THE AMOUNT OF AND THE SPEED AT WHICH THE SLURRY IS INTRODUCED THROUGH THE SLURRY INLET, THE AMOUNT OF AND THE SPEED AT WHICH THE AIR IS PASSED THROUGH THE HEARTH AND THE TEMPERATURE IN THE CHAMBER,
Claim 2
Dependent Claim
169 words
IN APPARATUS FOR THE FLUIDIZED BED ROASTING OF METAL SULFIDE CONCENTRATES AND THE LIKE, THE COMBUSTION COMPRISING AN INSULATED CHAMBER, A TRANSVERSE PERFORATED HEARTH AT THE LOWER PORTION OF THE CHAMBER, A WIND BOX BELOW THE HEARTH INTO WHICH AIR MAY BE INTRODUCED TO PASS UPWARDLY THROUGH THE PERFORATED HEARTH INTO OVERLYING MATERIAL TO FLUIDIZE THE SAME, AN INLET FOR THE INTRODUCTION OF A METAL SULFIDE SLURRY INTO AN UPPER PORTION OF THE CHAMBER, A CALCINE DISCHARGE LOCATED ABOVE THE PERFORATED HEARTH TO MAINTAIN ON SAID HEARTH A FLUIDIZED BED OF MATERIAL OF A PERDETERMINED DEPTH, THE DISTANCE BETWEEN THE LEVEL OF THE METAL SULFIDE SLURRY INLET AND THE LEVEL OF THE CALCINE DISCHARGE BEING AT LEAST ABOUT ELEVEN AND ONE-HALF FEET AND SUCH, WITH RESPECT TO THE CHARACTERISTICS OF THE SLURRY, THE AMOUNT OF AND THE SPEED AT WHICH THE SLURRY IS INTRODUCED THROUGH THE SLURRY INLET, THE AMOUNT OF AND THE SPEED AT WHICH THE AIR IS PASSED THROUGH THE HEARTH AND THE TEMPERATURE IN THE CHAMBER,
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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) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |