Reductive roasting and magnetic separation of Greek bauxite residue for its utilization in iron ore industry

Xenidis, A; Zografidis, C; Kotsis, I; Boufounos, D

dc.contributor.author	Xenidis, A	en
dc.contributor.author	Zografidis, C	en
dc.contributor.author	Kotsis, I	en
dc.contributor.author	Boufounos, D	en
dc.date.accessioned	2014-03-01T02:52:06Z
dc.date.available	2014-03-01T02:52:06Z
dc.date.issued	2009	en
dc.identifier.issn	01470809	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35844
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-71849113605&partnerID=40&md5=d8603250219ea73c3b7375a3c556f9bb	en
dc.subject	Bauxite	en
dc.subject	Magnetic separation	en
dc.subject	Reduction	en
dc.subject	Residue	en
dc.subject	Roasting	en
dc.subject.other	Addition rate	en
dc.subject.other	Bauxite	en
dc.subject.other	Bauxite residue	en
dc.subject.other	Dispersants	en
dc.subject.other	Dispersing agent	en
dc.subject.other	Effect of parameters	en
dc.subject.other	Iron content	en
dc.subject.other	Iron minerals	en
dc.subject.other	Iron ore industry	en
dc.subject.other	Iron recovery	en
dc.subject.other	Low currents	en
dc.subject.other	Metallic iron	en
dc.subject.other	Reducing conditions	en
dc.subject.other	Calcination	en
dc.subject.other	Cast iron	en
dc.subject.other	Functional electric stimulation	en
dc.subject.other	Iron ores	en
dc.subject.other	Iron research	en
dc.subject.other	Light metals	en
dc.subject.other	Magnetic fields	en
dc.subject.other	Magnetic properties	en
dc.subject.other	Magnetic separation	en
dc.subject.other	Metal recovery	en
dc.subject.other	Minerals	en
dc.subject.other	Ore reduction	en
dc.subject.other	Ore roasting	en
dc.subject.other	Oxide minerals	en
dc.subject.other	Silicate minerals	en
dc.subject.other	Sponge iron	en
dc.subject.other	Magnetic materials	en
dc.title	Reductive roasting and magnetic separation of Greek bauxite residue for its utilization in iron ore industry	en
heal.type	conferenceItem	en
heal.publicationDate	2009	en
heal.abstract	The treatment of Greek bauxite residue through reduction roasting and magnetic separation is investigated. A sample of Greek bauxite residue, hematite being the predominant iron carrier mineral, is subjected to reduction roasting to produce a calcine with intensive magnetic properties where magnetite or metallic iron are the main iron mineral phases. The calcine is then subjected to wet magnetic separation so that the magnetic product can be utilized as a feed for sponge or cast iron production. The effect of parameters such as temperature, intensity of reducing conditions, intensity of magnetic field or dispersing agent addition rate on the result of both processes is investigated. It was indicated that reductive roasting at 500°C followed by wet magnetic separation of the calcine produced at low current intensity (0.04 A) and simultaneous addition of a dispersant resulted in the production of a magnetic product with iron content as high as 36%. The obtained results regarding iron recovery were very promising providing input for further research on the optimization of the proposed method.	en
heal.journalName	TMS Light Metals	en
dc.identifier.spage	63	en
dc.identifier.epage	67	en