Acid and oxidizing leaching of chalcopyrite concentrate by ferric sulphate and fluorosilicic-nitric media
Identifieur interne : 000B76 ( Main/Exploration ); précédent : 000B75; suivant : 000B77Acid and oxidizing leaching of chalcopyrite concentrate by ferric sulphate and fluorosilicic-nitric media
Auteurs : K. Elamari [Maroc] ; E. A. Jdid ; P. Blazy ; A. Bouhafid ; M. El Meray ; I. AkalaySource :
- Separation Science and Technology [ 0149-6395 ] ; 2000.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Cuivre, Minéralogie.
English descriptors
- KwdEn :
Abstract
A hydrometallurgical treatment was applied to the Hajar Mine Copper Concentrate (HMCC), Morocco, containing ≃ 28.1% copper (the major copper mineral phase is chalcopyrite, CuFeS2), ≃ 26.3% iron, ≃ 5.8% zinc, ≃ 1.9% lead, ≃ 33.7% sulphur, and small amounts of silver (269 g/t) and nickel (219 g/t). Three acid media were used: ferric sulphate in sulfuric acid, ferric sulphate in hexafluorosilicic acid, and a hexafluorosilicic acid-nitric acid mixture. The results show that when a ferric sulphate reagent is used, in H2SO4, as well as in H2SiF6 media, dissolution of copper and iron do not exceed 30%, because of the formation of a passivation layer on chalcopyrite particles, whereas zinc is dissolved at about 90%. The final solid leachate residue represents 75% by weight of the initial solid and remains rich in copper (≃ 28%) and iron (≃ 25%). However, under strong acid and oxidizing conditions, in the hexafluorosilicic acid-nitric acid mixture, the dissolution of copper is more efficient, although it is nonselective, (92% Cu, 89% Fe, 98% Zn). The solid leachate residue represents only 40% by weight of the original sample, and assays 5.9% Cu, 7.3% Fe, 0.2% Zn, 4.1% Pb, and 56.4% Stotal. Mineralogical characterizations of the leachate solid residues show the formation of both elemental sulphur and a Cu1-xFe1-yS2-z layer on the surface of the nondissolved chalcopyrite.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Acid and oxidizing leaching of chalcopyrite concentrate by ferric sulphate and fluorosilicic-nitric media</title><author><name sortKey="Elamari, K" sort="Elamari, K" uniqKey="Elamari K" first="K." last="Elamari">K. Elamari</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Faculte des Sciences et Techniques Gueliz</s1><s2>Marrakech</s2><s3>MAR</s3><sZ>1 aut.</sZ></inist:fA14><country>Maroc</country><placeName><settlement type="city">Marrakech</settlement><region nuts="2">Marrakech-Tensift-Al Haouz</region></placeName></affiliation></author><author><name sortKey="Jdid, E A" sort="Jdid, E A" uniqKey="Jdid E" first="E. A." last="Jdid">E. A. Jdid</name></author><author><name sortKey="Blazy, P" sort="Blazy, P" uniqKey="Blazy P" first="P." last="Blazy">P. Blazy</name></author><author><name sortKey="Bouhafid, A" sort="Bouhafid, A" uniqKey="Bouhafid A" first="A." last="Bouhafid">A. Bouhafid</name></author><author><name sortKey="El Meray, M" sort="El Meray, M" uniqKey="El Meray M" first="M." last="El Meray">M. El Meray</name></author><author><name sortKey="Akalay, I" sort="Akalay, I" uniqKey="Akalay I" first="I." last="Akalay">I. Akalay</name></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">01-0032413</idno><date when="2000">2000</date><idno type="stanalyst">PASCAL 01-0032413 EI</idno><idno type="RBID">Pascal:01-0032413</idno><idno type="wicri:Area/PascalFrancis/Corpus">000424</idno><idno type="wicri:Area/PascalFrancis/Curation">000017</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000434</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000434</idno><idno type="wicri:doubleKey">0149-6395:2000:Elamari K:acid:and:oxidizing</idno><idno type="wicri:Area/Main/Merge">000C10</idno><idno type="wicri:Area/Main/Curation">000B76</idno><idno type="wicri:Area/Main/Exploration">000B76</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Acid and oxidizing leaching of chalcopyrite concentrate by ferric sulphate and fluorosilicic-nitric media</title><author><name sortKey="Elamari, K" sort="Elamari, K" uniqKey="Elamari K" first="K." last="Elamari">K. Elamari</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Faculte des Sciences et Techniques Gueliz</s1><s2>Marrakech</s2><s3>MAR</s3><sZ>1 aut.</sZ></inist:fA14><country>Maroc</country><placeName><settlement type="city">Marrakech</settlement><region nuts="2">Marrakech-Tensift-Al Haouz</region></placeName></affiliation></author><author><name sortKey="Jdid, E A" sort="Jdid, E A" uniqKey="Jdid E" first="E. A." last="Jdid">E. A. Jdid</name></author><author><name sortKey="Blazy, P" sort="Blazy, P" uniqKey="Blazy P" first="P." last="Blazy">P. Blazy</name></author><author><name sortKey="Bouhafid, A" sort="Bouhafid, A" uniqKey="Bouhafid A" first="A." last="Bouhafid">A. Bouhafid</name></author><author><name sortKey="El Meray, M" sort="El Meray, M" uniqKey="El Meray M" first="M." last="El Meray">M. El Meray</name></author><author><name sortKey="Akalay, I" sort="Akalay, I" uniqKey="Akalay I" first="I." last="Akalay">I. Akalay</name></author></analytic><series><title level="j" type="main">Separation Science and Technology</title><title level="j" type="abbreviated">Sep Sci Technol</title><idno type="ISSN">0149-6395</idno><imprint><date when="2000">2000</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Separation Science and Technology</title><title level="j" type="abbreviated">Sep Sci Technol</title><idno type="ISSN">0149-6395</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Acid</term><term>Chalcopyrite concentrate</term><term>Copper</term><term>Dissolution</term><term>Experiments</term><term>Ferric sulphate</term><term>Fluorosilicic acid</term><term>Hydrometallurgy</term><term>Leaching</term><term>Mineralogy</term><term>Mixtures</term><term>Nitric acid</term><term>Oxidizing</term><term>Sulfur compounds</term><term>Sulfuric acid</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Expérience</term><term>Cuivre</term><term>Soufre composé</term><term>Nitrique acide</term><term>Hydrométallurgie</term><term>Sulfurique acide</term><term>Mélange</term><term>Dissolution</term><term>Minéralogie</term><term>Lixiviation</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Cuivre</term><term>Minéralogie</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">A hydrometallurgical treatment was applied to the Hajar Mine Copper Concentrate (HMCC), Morocco, containing ≃ 28.1% copper (the major copper mineral phase is chalcopyrite, CuFeS2), ≃ 26.3% iron, ≃ 5.8% zinc, ≃ 1.9% lead, ≃ 33.7% sulphur, and small amounts of silver (269 g/t) and nickel (219 g/t). Three acid media were used: ferric sulphate in sulfuric acid, ferric sulphate in hexafluorosilicic acid, and a hexafluorosilicic acid-nitric acid mixture. The results show that when a ferric sulphate reagent is used, in H2SO4, as well as in H2SiF6 media, dissolution of copper and iron do not exceed 30%, because of the formation of a passivation layer on chalcopyrite particles, whereas zinc is dissolved at about 90%. The final solid leachate residue represents 75% by weight of the initial solid and remains rich in copper (≃ 28%) and iron (≃ 25%). However, under strong acid and oxidizing conditions, in the hexafluorosilicic acid-nitric acid mixture, the dissolution of copper is more efficient, although it is nonselective, (92% Cu, 89% Fe, 98% Zn). The solid leachate residue represents only 40% by weight of the original sample, and assays 5.9% Cu, 7.3% Fe, 0.2% Zn, 4.1% Pb, and 56.4% Stotal. Mineralogical characterizations of the leachate solid residues show the formation of both elemental sulphur and a Cu1-xFe1-yS2-z layer on the surface of the nondissolved chalcopyrite.</div></front></TEI><affiliations><list><country><li>Maroc</li></country><region><li>Marrakech-Tensift-Al Haouz</li></region><settlement><li>Marrakech</li></settlement></list><tree><noCountry><name sortKey="Akalay, I" sort="Akalay, I" uniqKey="Akalay I" first="I." last="Akalay">I. Akalay</name><name sortKey="Blazy, P" sort="Blazy, P" uniqKey="Blazy P" first="P." last="Blazy">P. Blazy</name><name sortKey="Bouhafid, A" sort="Bouhafid, A" uniqKey="Bouhafid A" first="A." last="Bouhafid">A. Bouhafid</name><name sortKey="El Meray, M" sort="El Meray, M" uniqKey="El Meray M" first="M." last="El Meray">M. El Meray</name><name sortKey="Jdid, E A" sort="Jdid, E A" uniqKey="Jdid E" first="E. A." last="Jdid">E. A. Jdid</name></noCountry><country name="Maroc"><region name="Marrakech-Tensift-Al Haouz"><name sortKey="Elamari, K" sort="Elamari, K" uniqKey="Elamari K" first="K." last="Elamari">K. Elamari</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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