Hydrochloric acid-hydrogen peroxide leaching and metal recovery from a Greek zinc-lead bulk sulphide concentrate

Vazarlis, HG

dc.contributor.author	Vazarlis, HG	en
dc.date.accessioned	2014-03-01T01:39:13Z
dc.date.available	2014-03-01T01:39:13Z
dc.date.issued	1987	en
dc.identifier.issn	0304386X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/22617
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0023570942&partnerID=40&md5=cb9be07e4f88816804d44e56d19e8d13	en
dc.subject.other	HYDROMETALLURGY	en
dc.subject.other	LEAD ORE TREATMENT - Leaching	en
dc.subject.other	GREECE	en
dc.subject.other	HYDROCHLORIC ACID-HYDROGEN PEROXIDE LEACHING	en
dc.subject.other	ZINC ORE TREATMENT	en
dc.title	Hydrochloric acid-hydrogen peroxide leaching and metal recovery from a Greek zinc-lead bulk sulphide concentrate	en
heal.type	journalArticle	en
heal.publicationDate	1987	en
heal.abstract	A zinc-lead bulk sulphide concentrate from Kirki (Greece) was leached in aqueous solution with HClH2O2at atmospheric pressure and 95°C to extract up to 97% zinc, 40% lead, 80% silver and less than 12% iron after 6 h. Highly pure PbCl2 crystallized from the leach filtrate on cooling. Sulphur was oxidized to the elemental form; its loss as sulphate ion in solution and residue was 7.5%. During leaching no emission of H2S or SO2 was detected. Conditions were determined for producing a pregnant solution (130 g/L Zn) low in iron and lead, to facilitate zinc extraction by electrolysis. Leaching experiments were conducted at 40% solids, 0.55 g HCl and 0.26 g H2O2 per gramme concentrate in a 1-L reactor. After a second leaching of the residue in aqueous solution with HCl (1 M) for 1 h at 90°C, the residual lead sulphate was extracted, so that total lead recovery was over 98%. Other values, such as silver and sulphur, could be recovered by additional treatment of either the leach solution or leach residue. © 1987.	en
heal.journalName	Hydrometallurgy	en
dc.identifier.volume	19	en
dc.identifier.issue	2	en
dc.identifier.spage	243	en
dc.identifier.epage	251	en