Process for enrichment of a ferronickel alloy to 90 Pct Ni

Moussoulos, L

dc.contributor.author	Moussoulos, L	en
dc.date.accessioned	2014-03-01T01:05:36Z
dc.date.available	2014-03-01T01:05:36Z
dc.date.issued	1976	en
dc.identifier.issn	0360-2141	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/8894
dc.subject	Iron	en
dc.subject	Liquid Metal	en
dc.subject	Nickel	en
dc.subject	Temperature Control	en
dc.subject	Stainless Steel	en
dc.subject.classification	Metallurgy & Metallurgical Engineering	en
dc.subject.other	EXTRACTIVE METALLURGY	en
dc.subject.other	PYROMETALLURGY	en
dc.subject.other	LATERITIC ORE	en
dc.subject.other	NICKEL METALLURGY	en
dc.title	Process for enrichment of a ferronickel alloy to 90 Pct Ni	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/BF02698596	en
heal.identifier.secondary	http://dx.doi.org/10.1007/BF02698596	en
heal.language	English	en
heal.publicationDate	1976	en
heal.abstract	The nickel of most lateritic ores is extracted as a FeNi alloy containing a certain amount of cobalt. The utilization of this ferroalloy is effectively limited to the fabrication of stainless steels, which absorbs about 40 pct of the total nickel consumption. The production of electrolytic nickel from ferronickel is feasible, but it requires anodes made of alloy enriched to at least 80 pct Ni. Such enrichment is complicated by the simultaneous oxidation of nickel during the slagging of iron, which accelerates as the iron is depleted and becomes prohibitive for an alloy with more than 60 pct Ni. A simple and economical upgrading of ferronickel up to 90 pct Ni is proposed by a two-stage converting with oxygen, under simultaneous addition of nickeliferous laterite. Nickel losses are effectively restricted by the two-stage operation. The rich slags of the second stage, produced in contact with an alloy of more than 60 pct Ni, are recycled in liquid state into the empty first stage converter. The subsequent addition of the low grade liquid metal into the first stage converter ""washes"" the rich slags and reduces their nickel content. The slags of the first stage, produced in contact with low grade alloys, contain little nickel and are discarded. The overall nickel loss is considerably reduced by blowing in short blows with intermediate slag skimmings. The addition of the lateritic ore, during converting, achieves a very satisfactory and inexpensive temperature control, substitutes as a flux, and introduces nickel and oxygen to the process at a very minimal cost. The heat evolved during the oxidation of the iron in the molten alloy is effectively utilized for the smelting of the laterite added. © 1976 The Minerals, Metals & Materials Society - ASM International - The Materials Information Society.	en
heal.publisher	Springer-Verlag	en
heal.journalName	Metallurgical Transactions B	en
dc.identifier.doi	10.1007/BF02698596	en
dc.identifier.isi	ISI:A1976CS12900015	en
dc.identifier.volume	7	en
dc.identifier.issue	4	en
dc.identifier.spage	631	en
dc.identifier.epage	637	en