Production of zinc oxide from hazardous waste - Sal Ammoniac Skimming
This article deals with hydrometallurgical treatment with the subsequent precipitation of zinc from hazardous waste Sal- Ammoniac Skimming produced in wet hot-dip galvanizing process. Chemical analysis showed that skimming contained 46.64% Zn. X-ray diffraction analysis identified the Zn(OH)Cl phase...
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| Format: | Article |
| Language: | English |
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University of Belgrade, Technical Faculty, Bor
2018-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2018/1450-53391800027P.pdf |
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| author | Piroskova J. Trpcevska J. Orac D. Laubertova M. Horvathova H. Holkova B. |
| author_facet | Piroskova J. Trpcevska J. Orac D. Laubertova M. Horvathova H. Holkova B. |
| author_sort | Piroskova J. |
| collection | DOAJ |
| description | This article deals with hydrometallurgical treatment with the subsequent precipitation of zinc from hazardous waste Sal- Ammoniac Skimming produced in wet hot-dip galvanizing process. Chemical analysis showed that skimming contained 46.64% Zn. X-ray diffraction analysis identified the Zn(OH)Cl phase (96.36%) and NH4Cl (3.64%) in Sal-Ammoniac Skimming. The skimming was first subjected to leaching in order to extract zinc into the solution containing HCl, followed by precipitation of the zinc. The experiments were performed in a medium of HCl at concentrations of 0.25, 0.5, 1 and 2M. Complete dissolution of zinc was achieved in 0.5M HCl solution, at 40°C, L:S=20, max. 30 min. The apparent activation energy of leaching reaction by hydrochloric acid solution was Ea=5.543 kJ mol-1. Zn precipitation was carried out using Na2CO3 and NaOH. Zinc oxide with a purity of about 99% was obtained directly from the solution of 6M NaOH at a temperature of 60°C – 80°Cat pH 8.8. |
| format | Article |
| id | doaj-art-f60382979c1545e5afc45f55e89242b6 |
| institution | Kabale University |
| issn | 1450-5339 2217-7175 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-f60382979c1545e5afc45f55e89242b62025-02-03T00:39:49ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392217-71752018-01-0154337738410.2298/JMMB180621027P1450-53391800027PProduction of zinc oxide from hazardous waste - Sal Ammoniac SkimmingPiroskova J.0Trpcevska J.1Orac D.2Laubertova M.3Horvathova H.4Holkova B.5Technical University of Kosice, Faculty of Materials, Metallurgy and Recycling, Institute of Recycling Technologies, Kosice, Slovak RepublicTechnical University of Kosice, Faculty of Materials, Metallurgy and Recycling, Institute of Recycling Technologies, Kosice, Slovak RepublicTechnical University of Kosice, Faculty of Materials, Metallurgy and Recycling, Institute of Recycling Technologies, Kosice, Slovak RepublicTechnical University of Kosice, Faculty of Materials, Metallurgy and Recycling, Institute of Recycling Technologies, Kosice, Slovak RepublicTechnical University of Kosice, Faculty of Materials, Metallurgy and Recycling, Institute of Recycling Technologies, Kosice, Slovak RepublicTechnical University of Kosice, Faculty of Materials, Metallurgy and Recycling, Institute of Recycling Technologies, Kosice, Slovak RepublicThis article deals with hydrometallurgical treatment with the subsequent precipitation of zinc from hazardous waste Sal- Ammoniac Skimming produced in wet hot-dip galvanizing process. Chemical analysis showed that skimming contained 46.64% Zn. X-ray diffraction analysis identified the Zn(OH)Cl phase (96.36%) and NH4Cl (3.64%) in Sal-Ammoniac Skimming. The skimming was first subjected to leaching in order to extract zinc into the solution containing HCl, followed by precipitation of the zinc. The experiments were performed in a medium of HCl at concentrations of 0.25, 0.5, 1 and 2M. Complete dissolution of zinc was achieved in 0.5M HCl solution, at 40°C, L:S=20, max. 30 min. The apparent activation energy of leaching reaction by hydrochloric acid solution was Ea=5.543 kJ mol-1. Zn precipitation was carried out using Na2CO3 and NaOH. Zinc oxide with a purity of about 99% was obtained directly from the solution of 6M NaOH at a temperature of 60°C – 80°Cat pH 8.8.http://www.doiserbia.nb.rs/img/doi/1450-5339/2018/1450-53391800027P.pdfSal Ammoniac SkimmingZincleachingprecipitationzinc oxide |
| spellingShingle | Piroskova J. Trpcevska J. Orac D. Laubertova M. Horvathova H. Holkova B. Production of zinc oxide from hazardous waste - Sal Ammoniac Skimming Journal of Mining and Metallurgy. Section B: Metallurgy Sal Ammoniac Skimming Zinc leaching precipitation zinc oxide |
| title | Production of zinc oxide from hazardous waste - Sal Ammoniac Skimming |
| title_full | Production of zinc oxide from hazardous waste - Sal Ammoniac Skimming |
| title_fullStr | Production of zinc oxide from hazardous waste - Sal Ammoniac Skimming |
| title_full_unstemmed | Production of zinc oxide from hazardous waste - Sal Ammoniac Skimming |
| title_short | Production of zinc oxide from hazardous waste - Sal Ammoniac Skimming |
| title_sort | production of zinc oxide from hazardous waste sal ammoniac skimming |
| topic | Sal Ammoniac Skimming Zinc leaching precipitation zinc oxide |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2018/1450-53391800027P.pdf |
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