US2934422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of ferrochromium products
Assignee: STRATEGIC UDY METALLURGICAL & CHEMICAL PROCESSES Ltd
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Filing: 1958-04-30
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Granted: 1960-04-26
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Expires: 1978-04-30
Abstract
No abstract record available.
Inventors
- 👤 Marvin J Udy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:43
CPC Classifications
C; C21; C21B; C21B7/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
124 words
PROCESS FOR THE PRODUCTION OF FERROCHROMIUM THAT COMPRISES SMELTING A CHARGE COMPRISING CHROMITE-BEARING MATERIAL IN THE PRESENCE OF A REDUCING AGENT IN AMOUNT SUFFICIENT TO EFFECT REDUCTION TO THE METALLIC STATE OF SUBSTANTIALLY ALL OF THE IRON AND CHROMIUM CONTAINED THEREIN, FLUXING SAID CHROMITE-BEARING MATERIAL WITH SILICA, ALUMINA AND MAGNESIA IN RESPECTIVE AMOUNTS ARE REQUIRED IN COMBINATION WITH THE NATURAL SILICA, ALUMINA AND MAGNESIA CONTENTS THEREOF TO PROVIDE FOR THE PRODUCTION OF A FLUID MOLTEN SLAG PRODUCT CONTAINING SILICA, ALUMINA AND MAGNESIA IN RESPECTIVE PROPORTIONS WITHIN THE RANGES OF 0.5 TO 1.5 PARTS BY WEIGHT OF MAGNESIA AND 0.25 TO 1.25 PARTS BY WEIGHT OF ALUMINA TO EACH PART BY WEIGHT OF SILICA, AND SEPARATING AND RECOVERING FERROCHROMIUM FROM SAID FLUID MOLTEN SLAG PRODUCT.
Claim 2
Dependent Claim
124 words
PROCESS FOR THE PRODUCTION OF FERROCHROMIUM THAT COMPRISES SMELTING A CHARGE COMPRISING CHROMITE-BEARING MATERIAL IN THE PRESENCE OF A REDUCING AGENT IN AMOUNT SUFFICIENT TO EFFECT REDUCTION TO THE METALLIC STATE OF SUBSTANTIALLY ALL OF THE IRON AND CHROMIUM CONTAINED THEREIN, FLUXING SAID CHROMITE-BEARING MATERIAL WITH SILICA, ALUMINA AND MAGNESIA IN RESPECTIVE AMOUNTS ARE REQUIRED IN COMBINATION WITH THE NATURAL SILICA, ALUMINA AND MAGNESIA CONTENTS THEREOF TO PROVIDE FOR THE PRODUCTION OF A FLUID MOLTEN SLAG PRODUCT CONTAINING SILICA, ALUMINA AND MAGNESIA IN RESPECTIVE PROPORTIONS WITHIN THE RANGES OF 0.5 TO 1.5 PARTS BY WEIGHT OF MAGNESIA AND 0.25 TO 1.25 PARTS BY WEIGHT OF ALUMINA TO EACH PART BY WEIGHT OF SILICA, AND SEPARATING AND RECOVERING FERROCHROMIUM FROM SAID FLUID MOLTEN SLAG PRODUCT.
Claim 3
Dependent Claim
102 words
IN A PROCESS FOR THE PRODUCTION OF ENHANCED CHROMIUM:IRON RATIO SLAG CONCENTRATES FROM LOW CHROMIUM: IRON RATIO CHROMITE MATERIAL, THE IMPROVEMENT THAT COMPRISES HEATING A CHARGE COMPRISING THE CHROMITE MATERIAL AND ADDED SILICA, ALUMINA AND MAGNESIA FLUXING MATERIALS WITHIN AN ARC ELECTRIC FURNACE UNDER ACTION OF COMBINED ARC-RESISTANCE, SLAG-RESISTANCE HEATING AND IN THE PRESENCE OF A CONTROLLED AMOUNT OF A CARBONACEOUS REDUCING AGENT TO EFFECT THE SELECTIVE REDUCTION TO THE METALLIC STATE OF A PREDETERMINED PORTION OF THE IRON OXIDE CONTENT THEREOF, AND SEPARATING AND RECOVERING A METALLIC IRON PRODUCT OC LOW CHROMIUM CONTENT AND A SLAG PRODUCT OF ENHANCED CHROMIUM:IRON RATIO.
Claim 4
Dependent Claim
102 words
IN A PROCESS FOR THE PRODUCTION OF ENHANCED CHROMIUM:IRON RATIO SLAG CONCENTRATES FROM LOW CHROMIUM: IRON RATIO CHROMITE MATERIAL, THE IMPROVEMENT THAT COMPRISES HEATING A CHARGE COMPRISING THE CHROMITE MATERIAL AND ADDED SILICA, ALUMINA AND MAGNESIA FLUXING MATERIALS WITHIN AN ARC ELECTRIC FURNACE UNDER ACTION OF COMBINED ARC-RESISTANCE, SLAG-RESISTANCE HEATING AND IN THE PRESENCE OF A CONTROLLED AMOUNT OF A CARBONACEOUS REDUCING AGENT TO EFFECT THE SELECTIVE REDUCTION TO THE METALLIC STATE OF A PREDETERMINED PORTION OF THE IRON OXIDE CONTENT THEREOF, AND SEPARATING AND RECOVERING A METALLIC IRON PRODUCT OC LOW CHROMIUM CONTENT AND A SLAG PRODUCT OF ENHANCED CHROMIUM:IRON RATIO.
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) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |