Selective autoclave recovery of copper and silver from Waelz clinker in ammonia medium

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creativework.keywordsAmmonia medium, Autoclave leaching, Copper, Silver, Waelz clinker
creativework.publisherUniversity of Chemical Technology and Metallurgyjournal@uctm.eduen
dc.contributor.authorIliev P.
dc.contributor.authorStefanova V.
dc.contributor.authorLucheva B.
dc.contributor.authorKolev D.
dc.date.accessioned2024-07-16T11:16:48Z
dc.date.accessioned2024-07-16T11:18:28Z
dc.date.available2024-07-16T11:16:48Z
dc.date.available2024-07-16T11:18:28Z
dc.date.issued2017-01-01
dc.description.abstractUpon processing of zinc ferrite cakes in Waelz kilns a waste product, called Waelz clinker, is obtained. The copper and silver contents in this product are comparable to those of their ores which turns it into a valuable raw material. In the present work the experimental results on selective autoclave leaching of Waelz clinker in ammonia medium are presented. The effect of main technological parameters on the degree of value metals recovery and iron precipitation is studied. It is established that the highest extend of copper and silver recovery is obtained under the following conditions: temperature 383 K, Po2 0.4 MPa, ammonia concentration 110 g l-1, ammonium sulfate concentration 70 g l-1, pulp density 100 g l-1and test duration 120 min. At these conditions 86,5 % of copper and 68,5 % of silver are solubilized, whereupon over 99 % of iron is hydrolytically precipitated. The composition of the corresponding leach solution is: 1,22 g l-1Cu, 10 mg l-1 Ag, 90 mg l-1 Zn, 30 mg l-1 Fe and 40 mg l-1 Mn.
dc.identifier.issn1314-7978
dc.identifier.issn1314-7471
dc.identifier.scopusSCOPUS_ID:85014117236en
dc.identifier.urihttps://rlib.uctm.edu/handle/123456789/1172
dc.language.isoen
dc.source.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85014117236&origin=inward
dc.titleSelective autoclave recovery of copper and silver from Waelz clinker in ammonia medium
dc.typeArticle
oaire.citation.issue2
oaire.citation.volume52
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