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Influence of binder formulation on batch agglomeration behaviour and granule properties of lateritic ores

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dc.contributor.authorNosrati, A.
dc.contributor.authorQuaicoe, I.
dc.contributor.authorAddai Mensah, J.
dc.contributor.authorSkinner, W.
dc.contributor.conferenceChemeca 2012: Annual Conference of Australian and New Zealand Engineers (23 Sep 2012 - 26 Sep 2012 : Wellington, New Zealand)
dc.date.issued2012
dc.description.abstractHeap slump, fines migration and poor solution distribution are amongst the major challenges that afflict heap leaching process by preventing optimum leach solution flow through the bed, and hence, reducing valuable metals' recovery. Such challenges may be overcome by mixing the crushed or finely ground ore with an appropriate binder (e.g., leaching solution) and agglomerating into coarse and robust granules prior to heap leaching. Physicochemical interactions between the ore particles and liquid binder play a pivotal role in controlling the agglomeration behaviour and defining the granule attributes. Both the physical (e.g., particle size, binder viscosity) and chemical (e.g., ore mineralogy, binder acidity) properties of the ore and the binder strongly influence their interactions. The aim of this study is to investigate the effect of binder composition on agglomeration behaviour and granule attributes of mixed oxide (hematite and quartz) and clay (kaolinite and smectite) minerals which constitute predominant host gangue mineral phases of a typical goethitic nickel (Ni) laterite ore. Batch agglomeration tests involving tap water, 30 and 44% w/w sulphuric acid solution as a binder clearly showed binder formulation dependent agglomeration behaviour, granule compressive strength and stability. Increasing the binder acidity dramatically slowed down the particle wetting, nucleation and granule growth processes. However, using binder solution with moderate acidity (30% H2SO4) led to production of agglomerates with higher strength and stability, compared with those produced with tap water or 44% H2SO4. The implications of the findings to improve real Ni laterite ores' agglomeration behaviour and granule attributed for enhanced heap leaching are discussed.
dc.identifier.citationChemeca 2012 proceedings: quality of life through chemical engineering, 2012, pp.1490]-1499
dc.identifier.isbn9781922107596
dc.identifier.orcidSkinner, W. [0000-0002-9606-023X]
dc.identifier.urihttps://hdl.handle.net/1959.8/125029
dc.language.isoen
dc.publisherEngineers Australia
dc.publisher.placeBarton, ACT
dc.relation.fundingCSIRO
dc.rightsCopyright 2012 Engineers Australia
dc.source.urihttps://search.informit.com.au/documentSummary;dn=866366873360616;res=IELENG
dc.subjectbinder formulation
dc.subjectbatch agglomeration behaviour
dc.subjectgranule properties
dc.subjectlateritic ores
dc.subjectheap leaching
dc.titleInfluence of binder formulation on batch agglomeration behaviour and granule properties of lateritic ores
dc.typeConference paper
pubs.publication-statusPublished
ror.mmsid9915909743401831

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