Effect of acid surface dissolution pretreatment on the selective flotation of ilmenite from olivine and pyroxene
Document identifier: oai:DiVA.org:ltu-75688
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10.1016/j.minpro.2017.07.017Keyword: Engineering and Technology,
Environmental Engineering,
Mineral and Mine Engineering,
Teknik och teknologier,
Naturresursteknik,
Mineral- och gruvteknik,
Materials Engineering,
Metallurgy and Metallic Materials,
Materialteknik,
Metallurgi och metalliska material,
Ilmenite,
Flotation,
Acid surface dissolution,
Zeta potentialPublication year: 2017Relevant Sustainable Development Goals (SDGs):
The SDG label(s) above have been assigned by OSDG.aiAbstract: The influence of acid surface dissolution as a pretreatment method on the improvement of ilmenite selective flotation from olivine-pyroxene was studied by carrying out the flotation experiments in micro and laboratory (flotation cell) scales. The microflotation experiments show that after surface dissolution, the flotation recovery of ilmenite improves from 73.5% to 92.1% at a pH of 6.3, while that of olivine-pyroxene decreases from 59.6% to 44.6%. The improvement of ilmenite floatability is in good accordance with the relative content of Fe3 + in ilmenite surface which increases from 48.5% to 59.8% after surface dissolution as evidenced by XPS analysis. This conversion increases the formation of an insoluble layer of ferric iron oleate, and enhances ilmenite hydrophobicity. FTIR spectra and zeta potential measurements indicated that the adsorption of oleate ions on the surface of olivine-pyroxene decreases significantly after surface dissolution. As evidenced by ICP analysis, this can be due to the dissolution of Fe cations as the active sites from the olivine-pyroxene surface. The cell flotation experiments show that before surface dissolution, an optimal concentrate with 21.2% TiO2 and 78.3% recovery is achieved using 1000 g/t sodium oleate, 100 g/t Pb(NO3)2 (activator) and 80 g/t quebracho (depressant). After surface dissolution, the best concentrate containing 25.6% TiO2 and 80.6% recovery is obtained in the presence of 1000 g/t collector and 100 g/t activator without any depressant agent. As a general result, the acid surface dissolution pretreatment enhances the selectivity of ilmenite flotation and its separation efficiency.
Authors
Parisa Semsari
Department of Mining and Metallurgical Eng., Amirkabir University of Technology, Tehran, Iran
Other publications
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Mehdi Irannajad
Department of Mining and Metallurgical Eng., Amirkabir University of Technology, Tehran, Iran
Other publications
>>
Akbar Mehdilo
Department of Mining and Metallurgical Eng., Amirkabir University of Technology, Tehran, Iran
Other publications
>>
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identifier: oai:DiVA.org:ltu-75688
datestamp: 2021-04-19T12:34:40Z
setSpec: SwePub-ltu
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recordInfo:
recordContentSource: ltu
recordCreationDate: 2019-08-25
identifier:
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-75688
10.1016/j.minpro.2017.07.017
titleInfo:
@attributes:
lang: eng
title: Effect of acid surface dissolution pretreatment on the selective flotation of ilmenite from olivine and pyroxene
abstract: The influence of acid surface dissolution as a pretreatment method on the improvement of ilmenite selective flotation from olivine-pyroxene was studied by carrying out the flotation experiments in micro and laboratory (flotation cell) scales. The microflotation experiments show that after surface dissolution the flotation recovery of ilmenite improves from 73.5% to 92.1% at a pH of 6.3 while that of olivine-pyroxene decreases from 59.6% to 44.6%. The improvement of ilmenite floatability is in good accordance with the relative content of Fe3 + in ilmenite surface which increases from 48.5% to 59.8% after surface dissolution as evidenced by XPS analysis. This conversion increases the formation of an insoluble layer of ferric iron oleate and enhances ilmenite hydrophobicity. FTIR spectra and zeta potential measurements indicated that the adsorption of oleate ions on the surface of olivine-pyroxene decreases significantly after surface dissolution. As evidenced by ICP analysis this can be due to the dissolution of Fe cations as the active sites from the olivine-pyroxene surface. The cell flotation experiments show that before surface dissolution an optimal concentrate with 21.2% TiO2 and 78.3% recovery is achieved using 1000 g/t sodium oleate 100 g/t Pb(NO3)2 (activator) and 80 g/t quebracho (depressant). After surface dissolution the best concentrate containing 25.6% TiO2 and 80.6% recovery is obtained in the presence of 1000 g/t collector and 100 g/t activator without any depressant agent. As a general result the acid surface dissolution pretreatment enhances the selectivity of ilmenite flotation and its separation efficiency.
subject:
@attributes:
lang: eng
authority: uka.se
topic:
Engineering and Technology
Environmental Engineering
Mineral and Mine Engineering
@attributes:
lang: swe
authority: uka.se
topic:
Teknik och teknologier
Naturresursteknik
Mineral- och gruvteknik
@attributes:
lang: eng
authority: uka.se
topic:
Engineering and Technology
Materials Engineering
Metallurgy and Metallic Materials
@attributes:
lang: swe
authority: uka.se
topic:
Teknik och teknologier
Materialteknik
Metallurgi och metalliska material
@attributes:
lang: eng
topic: Ilmenite
@attributes:
lang: eng
topic: Flotation
@attributes:
lang: eng
topic: Acid surface dissolution
@attributes:
lang: eng
topic: Zeta potential
language:
languageTerm: eng
genre:
publication/journal-article
ref
note:
Published
3
name:
@attributes:
type: personal
authority: ltu
namePart:
Semsari
Parisa
role:
roleTerm: aut
affiliation: Department of Mining and Metallurgical Eng. Amirkabir University of Technology Tehran Iran
nameIdentifier:
sempar
0000-0002-6284-5792
@attributes:
type: personal
namePart:
Irannajad
Mehdi
role:
roleTerm: aut
affiliation: Department of Mining and Metallurgical Eng. Amirkabir University of Technology Tehran Iran
@attributes:
type: personal
namePart:
Mehdilo
Akbar
role:
roleTerm: aut
affiliation: Department of Mining and Metallurgical Eng. Amirkabir University of Technology Tehran Iran
originInfo:
dateIssued: 2017
publisher: Elsevier
relatedItem:
@attributes:
type: host
titleInfo:
title: International Journal of Mineral Processing
identifier:
0301-7516
1879-3525
part:
detail:
@attributes:
type: volume
number: 167
extent:
start: 49
end: 60
physicalDescription:
form: print
typeOfResource: text