A study of the partial neutralization process of solutions obtained during autoclave dissolution of pyrite concentrate

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creativework.keywordsFe(III), Gypsum, Limestone, Neutralization, Pyrite concentrate, Sulfuric acid, Waste's marble
creativework.publisherUniversity of Chemical Technology and Metallurgyjournal@uctm.eduen
dc.contributor.authorPetkov K.
dc.contributor.authorStefanova V.
dc.contributor.authorStamenov L.
dc.contributor.authorIliev P.
dc.date.accessioned2024-07-16T11:16:47Z
dc.date.accessioned2024-07-16T11:18:26Z
dc.date.available2024-07-16T11:16:47Z
dc.date.available2024-07-16T11:18:26Z
dc.date.issued2017-01-01
dc.description.abstractThe process of the partial neutralization of solutions with high concentration of ferric ions and acidity (> 60g l-1 Fe3+ and H2SO4), obtained during autoclave dissolution of pyrite concentrate, has been studied. Two types of neutralizers have been used: limestone from deposit ore ``Velikan`` and a waste from cutting of marble plates - a fine and a coarse fraction. It was found that for the neutralization process limestone and the fine fraction from marble's waste can be used successfully. Both reactants are with a high content of calcium carbonate (> 92 %). The use of the coarse fraction of marble was inappropriate, due to the high content of magnesium carbonate (33.51 %) and the low extraction of gypsum (~ 49 %). The optimal parameters of neutralization process have been established: pH from 0.9 to 1.1, temperature 323K and time of neutralization 60 min. Gypsum, obtained under these conditions, has a high purity (< 0.05 % Fe, < 0.002 % Cu) and a high chemical activity. This makes it a suitable reactant for the conversion to ammonium sulfate, a commercial product that can be used as an artificial fertilizer.
dc.identifier.issn1314-7978
dc.identifier.issn1314-7471
dc.identifier.scopusSCOPUS_ID:85014073396en
dc.identifier.urihttps://rlib.uctm.edu/handle/123456789/1160
dc.language.isoen
dc.source.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85014073396&origin=inward
dc.titleA study of the partial neutralization process of solutions obtained during autoclave dissolution of pyrite concentrate
dc.typeArticle
oaire.citation.issue2
oaire.citation.volume52
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