OBTAINING OF IRON AND COPPER BY DIRECT REDUCTION OF THEIR MILL SCALE WASTES AT ELECTROTHERMAL ROTARY BED

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creativework.keywordscopper, direct reduction powder carbon, electrothermal rotary bed, iron, mill scale waste, recycling
creativework.publisherUniversity of Chemical Technology and Metallurgyen
dc.contributor.authorYordanov B.
dc.contributor.authorKrastev D.
dc.date.accessioned2024-07-16T11:16:50Z
dc.date.accessioned2024-07-16T11:19:20Z
dc.date.available2024-07-16T11:16:50Z
dc.date.available2024-07-16T11:19:20Z
dc.date.issued2021-01-01
dc.description.abstractIn this work some results of direct reduction process of iron and copper wastes from low carbon steels hot-rolling and ETP copper slabs with a powder graphite as a reducer to obtain a pure iron and copper are presented. The reduction in a furnace operating on the principle of electrothermal rotary bed (ETRB) at temperature range from 600°C to 800°C for copper and from 950°C to 1050°C for iron scale and isothermal hold for 60 min is carried out. Necessary heat for the process and reduction atmosphere are generated directly in the working space of the furnace when electrical current with industrial frequency passes through the reaction mixture which is composed from grinded copper or iron scale and graphite powder. The quantity of the reducer is above the stoichiometrically required for the reduction is taken. Cooling process by passing through reaction mixture of Ar as an inert gas is carried out to the temperatures 80°C - 100°C. The products of iron oxides reduction at 1050°C, size +1 mm, show completely reduced iron powder achieved for the time of isothermal hold of 60 min. The reduction process of copper scale at temperature 800°C, 60 min of isothermal hold for fractions -0.63 + 0.8 mm, is completely finished and the product consists of small globular copper particles with technical purity.
dc.identifier.issn1314-7978
dc.identifier.issn1314-7471
dc.identifier.scopusSCOPUS_ID:85101546986en
dc.identifier.urihttps://rlib.uctm.edu/handle/123456789/1308
dc.language.isoen
dc.source.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85101546986&origin=inward
dc.titleOBTAINING OF IRON AND COPPER BY DIRECT REDUCTION OF THEIR MILL SCALE WASTES AT ELECTROTHERMAL ROTARY BED
dc.typeArticle
oaire.citation.issue2
oaire.citation.volume56
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