Electric arc furnace operation
Abstract
Abstract AN IMPROVED METHOD FOR CONTINUOUS MELTING OF PARTICULATE MATERIAL IN AN ELECTRIC ARC FURNACE. THE PARTICLES ARE RENDERED AS A BODY FREE-FLOWING AND SUBSTANTIALY NONCONDUCTIVE ELECTRICALLY AND A BODY THEREOF IS ESTABLISHED AROUND AND IN CONTACT WITH A VERTICALLY ADJUSTABLE ELECTRODE AND A HIGH VOLTAGE ARE BETWEEN THE ELECTRODE AND A MOLTEN BATH OF THE MATERIAL THEREBY SHIELDING THE ARC AND ESTABLISHING A CONFINED ZONE OF HIGH TEMPERATURE IN CONTACT WITH AND AROUND THE ARC. PARTICLES ARE MELTED IN CONTACT WITH THE ARC AND CONTINUALLY REPLACED BY OTHERS AS MELTING OCCURS THEREBY MAINTAINING THE BODY IN CONTACT WITH THE ARC AND MAINTAINING THE CONFINED HIGH TEMPERATURE ZONE FOR RAPID MELTING THEREIN. THE DISTRIBUTION OF POWER BETWEEN THE ARC AND BATH IS CONTROLLED TO FAVOUR RELEASE OF POWER IN THE ARC AND THEREBY ACHIEVE HIGH THROUGHPUT OF PARTICLES PER UNIT AREA OF FURNACE HEARTH. THE METHOD IS PARTICULARLY ADVANTAGEOUS IN THE RECOVERY OF FERRONICKEL FROM NICKELIFEROUS ORES OF THE OXIDE AND SILICATE TYPES.
Inventors
- 👤 F Archibald
- 👤 G Hatch
Bibliographic Details
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