Effect of reductive roasting on smelting characteristics of Greek nickel laterites

Halikia, I; Skartados, K; Neou-Syngouna, P

dc.contributor.author	Halikia, I	en
dc.contributor.author	Skartados, K	en
dc.contributor.author	Neou-Syngouna, P	en
dc.date.accessioned	2014-03-01T02:42:06Z
dc.date.available	2014-03-01T02:42:06Z
dc.date.issued	2002	en
dc.identifier.issn	0371-9553	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30787
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0036767912&partnerID=40&md5=ff79a11a437bae98eb76bedea5c272ee	en
dc.subject.classification	Metallurgy & Metallurgical Engineering	en
dc.subject.classification	Mineralogy	en
dc.subject.classification	Mining & Mineral Processing	en
dc.subject.other	Electric arcs	en
dc.subject.other	Electric furnaces	en
dc.subject.other	Energy utilization	en
dc.subject.other	Melting	en
dc.subject.other	Rotary kilns	en
dc.subject.other	Serpentine	en
dc.subject.other	Reductive roasting	en
dc.subject.other	Nickel smelting	en
dc.title	Effect of reductive roasting on smelting characteristics of Greek nickel laterites	en
heal.type	conferenceItem	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	Research was undertaken to determine the effect of the reductive roasting conditions on the smelting characteristics of nickel laterite ores from three different areas of Greece-Evia, Viotia and Kastoria. The roasting experiments were performed in a rotary kiln at 800degrees, 860degrees and 900degreesC for 10-90 min; the smelting experiments were carried out in an electric-arc furnace that allowed the melting temperature and energy consumption to be monitored. The melting temperature values of the ore and roast samples were also determined with a LECO AF 600 instrument by enploying the Seger cones technique. The Evia samples, in which the SiO2/Fe-tot ratio was higher than in the ores from Viotia and Kastoria, exhibited the highest melting temperatures. The lowest values were observed for the Kastoria samples owing to the presence of serpentine, which had a positive effect on their fusibility. Reductive roasting of the Evia and Viotia ore samples was beneficial for the subsequent smelting stage, but roasting of the Kastoria samples resulted in an increase in the melting temperature, possibly on account of the production of refractory oxides. Finally, in agreement with the generally accepted view that reductive roasting has a positive effect on the subsequent smelting operation, increases in the temperature and duration of roasting of a composite laterite ore sample resulted in lower energy consumption during the reductive smelting, which was attributed to fayalite formation.	en
heal.publisher	INST MINING METALLURGY	en
heal.journalName	Transactions of the Institution of Mining and Metallurgy, Section C: Mineral Processing and Extractive Metallurgy	en
dc.identifier.isi	ISI:000182201700004	en
dc.identifier.volume	111	en
dc.identifier.issue	SEP./DEC.	en
dc.identifier.spage	C135	en
dc.identifier.epage	C142	en