Evaluation of saponins as acid mist suppressants in zinc electrowinning

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dc.contributor.authorCheng, CY
dc.contributor.authorUrbani, MD
dc.contributor.authorMiovski, P
dc.contributor.authorKittelty, D
dc.contributor.authorOtero, AF
dc.contributor.authorSan Martin, RM
dc.date.accessioned2024-01-10T12:38:47Z
dc.date.available2024-01-10T12:38:47Z
dc.date.issued2004
dc.description.abstractGeneration of acid mist is a major concern in zinc electrowinning (EW) due to its detrimental effects on worker's health, the environment and plant infrastructure. One of the effective methods for acid mist control is to form a foam layer above the electrolyte surface by using surfactants. In this work, two saponin-rich products (Mistop(R) and QLZinc(R)) and a commercial Licorice product were evaluated and compared as acid mist suppressants in zinc EW Foam properties, acid mist suppression, phase separation in solvent extraction, cathodic current efficiency (CE) and cathode quality were correlated to the addition of these surfactants. Foam properties studied included minimum soluble solids dosage for 100% foam coverage, time required to achieve 100% foam coverage and foam persistence time.
dc.description.abstractThe two saponin-rich products were found to be more effective foaming agents than Licorice. Based on foam property tests, the recommended soluble solids dosage was 1.8, 3.8 and 21.6 ppm for Mistop(R), QLZinc(R) and Licorice, respectively. At these dosages, acid mist suppression was 99% for both Quillaja products and 94% for Licorice. Foam coverage of 100% was achieved with 1.0 ppm of saponins when Mistop(R) was added, compared with 0.5 ppm of saponins when QLZinc(R) was added, suggesting that QLZinc(R). contains other Quillaja solids which are surface active and positively contribute to improve the quality of foam produced.
dc.description.abstractFor all three acid mist suppressants tested, no significant changes in phase disengagement time and interfacial tension were detected when an organic solution was separately contacted with the zinc electrolytes containing the three agents. The CE for the solutions containing 1.8, 3.8 and 21.6 ppm soluble solids of Mistop(R), QLZinc(R) and Licorice were 91.4%, 92.5% and 92.6%, respectively. These values were slightly lower than for the blank solution (92.8%). Zinc deposit quality was also affected slightly by all three agents tested. Overall, it is concluded that under the current testing conditions, Quillaja products, at much lower soluble solids dosage, performed very well and better than Licorice. (C) 2004 Elsevier B.V. All rights reserved.
dc.fechaingreso.objetodigital25-03-2024
dc.format.extent13 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.hydromet.2003.10.001
dc.identifier.issn0304-386X
dc.identifier.urihttps://doi.org/10.1016/j.hydromet.2003.10.001
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/77098
dc.identifier.wosidWOS:000220351900013
dc.information.autorucIngeniería;Otero A;S/I;1001062
dc.information.autorucIngeniería;San Martin R;S/I;51656
dc.issue.numero1-2
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final145
dc.pagina.inicio133
dc.publisherELSEVIER SCIENCE BV
dc.revistaHYDROMETALLURGY
dc.rightsacceso restringido
dc.subjectacid mist suppressant
dc.subjectzinc electrowinning
dc.subjectsurfactant
dc.subjectKIDD CREEK ELECTROLYTE
dc.subjectANTIMONY
dc.subjectSURFACTANT
dc.subjectCELLS
dc.titleEvaluation of saponins as acid mist suppressants in zinc electrowinning
dc.typeartículo
dc.volumen73
sipa.codpersvinculados1001062
sipa.codpersvinculados51656
sipa.indexWOS
sipa.trazabilidadCarga SIPA;09-01-2024
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