Chromium ore smelting redution process

In this invention, the smelting reduction operation can be carried out in a high efficiency by charging a carbonaceous material in such an amount that total surface area is not less than 60 m per 1 ton of slag weight. Furthermore, carbon substance finely particulating through thermal crumbling under...

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Bibliographic Details
Main Authors AIDA KIMIHARU, TAKEUCHI SHUJI, BESSHO NAGAYASU
Format Patent
LanguageEnglish
Published 19.11.1997
Edition6
Subjects
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
METALLURGY OF IRON
PRETREATMENT OF RAW MATERIALS
PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL
PRODUCTION AND REFINING OF METALS
TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:In this invention, the smelting reduction operation can be carried out in a high efficiency by charging a carbonaceous material in such an amount that total surface area is not less than 60 m per 1 ton of slag weight. Furthermore, carbon substance finely particulating through thermal crumbling under a high-temperature atmosphere inside the vessel is used as the carbonaceous material, whereby it is possible to stably conduct the smelting reduction while controlling the scattering of the carbonaceous material, and also the erosion, particularly locally erosion of refractory in the smelting reduction furnace, which was a serious problem in the conventional technique, can considerably be decreased to largely prolong the service life of refractory.
Bibliography:Application Number: CN19961091143