Roasting reduction study of greek nickeliferous laterites

Zevgolis, EN; Zografidis, C; Halikia, I; Devlin, E

dc.contributor.author	Zevgolis, EN	en
dc.contributor.author	Zografidis, C	en
dc.contributor.author	Halikia, I	en
dc.contributor.author	Devlin, E	en
dc.date.accessioned	2014-03-01T02:52:06Z
dc.date.available	2014-03-01T02:52:06Z
dc.date.issued	2009	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35845
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-67449156587&partnerID=40&md5=93f33704c4995153db72c2266f7230e0	en
dc.subject	Laterite	en
dc.subject	Pyrometallurgy	en
dc.subject	Reducibility	en
dc.subject	Roasting reduction	en
dc.subject.other	Critical parameter	en
dc.subject.other	Degree of reduction	en
dc.subject.other	Effect of parameters	en
dc.subject.other	Experimental conditions	en
dc.subject.other	Experimental studies	en
dc.subject.other	Grain size	en
dc.subject.other	Iron minerals	en
dc.subject.other	Laterite	en
dc.subject.other	Nickeliferous laterite	en
dc.subject.other	Reducibility	en
dc.subject.other	Reducing conditions	en
dc.subject.other	Reduction studies	en
dc.subject.other	Roasting reduction	en
dc.subject.other	Latente	en
dc.subject.other	Latentes	en
dc.subject.other	Calcination	en
dc.subject.other	Grain size and shape	en
dc.subject.other	Iron ores	en
dc.subject.other	Mining	en
dc.subject.other	Oxide minerals	en
dc.subject.other	Pyrometallurgy	en
dc.subject.other	Soils	en
dc.subject.other	Functional electric stimulation	en
dc.subject.other	Metal recovery	en
dc.subject.other	Ore reduction	en
dc.subject.other	Ore reduction	en
dc.subject.other	Minerals	en
dc.title	Roasting reduction study of greek nickeliferous laterites	en
heal.type	conferenceItem	en
heal.publicationDate	2009	en
heal.abstract	In the present work, a reduction roasting experimental study of Greek nickeliferous laterite samples with a gaseous reducing mixture - CO:N2- is presented. The effect of parameters such as temperature, ore grain size, and composition of the reducing mixture were examined. It is deduced that the reducibility of intermediate type laterite sample, where iron appears mainly in the form of goethite (a-FeOOH), is considerably higher than that of limonitic type laterite samples, where hematite (a-Fe2O3) is the predominant iron mineral phase. The degree of reduction of the limonitic type laterite samples does not exceed 50%, while it reaches 95% in the case of the intermediate-type laterite sample under the same experimental conditions. Increasing the temperature in the range 750-900°C does not considerably favor the reduction of the limonitic type laterites, whereas decrease of ore grain size of the limonitic-type ore samples and more intense reducing conditions increase the reduction. The considerably higher specific surface area values of the intermediate laterite samples, diminishes the effect of the ore grain size and this can be regarded as the critical parameter leading to the higher reducibility of this ore.	en
heal.journalName	TMS Annual Meeting	en
dc.identifier.spage	493	en
dc.identifier.epage	500	en