Bulk precipitation of nickel and cobalt from sulphate leach liquor by CaO pulp

Oustadakis, P; Agatzini-Leonardou, S; Tsakiridis, PE

dc.contributor.author	Oustadakis, P	en
dc.contributor.author	Agatzini-Leonardou, S	en
dc.contributor.author	Tsakiridis, PE	en
dc.date.accessioned	2014-03-01T01:25:59Z
dc.date.available	2014-03-01T01:25:59Z
dc.date.issued	2007	en
dc.identifier.issn	03719553	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17863
dc.subject	CaO pulp	en
dc.subject	Cobalt	en
dc.subject	Nickel	en
dc.subject	Precipitation	en
dc.subject.other	Atmospheric pressure	en
dc.subject.other	Calcium compounds	en
dc.subject.other	Cobalt	en
dc.subject.other	Differential thermal analysis	en
dc.subject.other	Particle size analysis	en
dc.subject.other	Precipitation (chemical)	en
dc.subject.other	Scanning electron microscopy	en
dc.subject.other	Sulfuric acid	en
dc.subject.other	Mineralogical phases	en
dc.subject.other	Statistical design	en
dc.subject.other	Sulphate leach liquor	en
dc.subject.other	Nickel	en
dc.title	Bulk precipitation of nickel and cobalt from sulphate leach liquor by CaO pulp	en
heal.type	journalArticle	en
heal.identifier.primary	10.1179/174328507X163814	en
heal.identifier.secondary	http://dx.doi.org/10.1179/174328507X163814	en
heal.publicationDate	2007	en
heal.abstract	The research work in the present paper determined the conditions at which nickel and cobalt can be recovered, as easily filterable precipitates, from leach liquors, which are produced by sulphuric acid leaching of nickel oxide ores at atmospheric pressure. Nickel and cobalt were precipitated as hydroxides at pH=8.7, using CaO pulp as a neutralising agent, by 99.9 and 99.8% respectively. At this pH value manganese and magnesium, which were contained in the leach liquor, were precipitated, having a concentration of about 2.6 and 4.7% respectively in the final mixed precipitate. Statistical design and analysis of experiments were used in order to determine the main effects and interactions of the precipitation factors, which were the pH value at equilibrium and temperature. The characterisation of the produced mixed precipitate was carried out by X-ray diffraction, thermogravimetric/differential thermal analysis (TG/DTA), scanning electron microscopy and particle size distribution analyser. The main mineralogical phases of the precipitate after drying at 110°C were nickel hydroxide and bassanite (CaSO 4.0.5H2O). © 2007 Institute of Materials, Minerals and Mining and The AusIMM.	en
heal.journalName	Transactions of the Institutions of Mining and Metallurgy, Section C: Mineral Processing and Extractive Metallurgy	en
dc.identifier.doi	10.1179/174328507X163814	en
dc.identifier.volume	116	en
dc.identifier.issue	4	en
dc.identifier.spage	245	en
dc.identifier.epage	250	en