Pb Recycling Through Leaching, Precipitation, and Cementation from Zinc Plant Residue
| Autor: | Mahdi Gharabaghi, Sajjad Aghazadeh, Behrouz Taheri |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
inorganic chemicals
Residue (complex analysis) Precipitation (chemistry) Metals and Alloys chemistry.chemical_element Sulfuric acid Zinc Environmental Science (miscellaneous) chemistry.chemical_compound chemistry Cementation process Mechanics of Materials Sodium hydroxide Cementation (metallurgy) Leaching (metallurgy) Nuclear chemistry |
| Zdroj: | Journal of Sustainable Metallurgy. 7:291-299 |
| ISSN: | 2199-3831 2199-3823 |
| DOI: | 10.1007/s40831-021-00338-2 |
| Popis: | This paper presents the hydrometallurgical methods used for the recovery of concentrate and metallic lead from zinc plant residue (ZPR). The ZPR mainly consisting of 9.5% Pb and 7.5% Zn was initially leached by sulfuric acid under the following conditions: leaching temperature 90 °C, leaching time 90 min., sulfuric acid concentration 200 g/l, and solid/liquid ratio 1/5. The zinc recovery obtained was 92.8%, which was finally directed to solvent extraction circuit to produce zinc cathode. Then acidic residue was subjected to alkaline leaching, using sodium hydroxide (NaOH). The lead recovery obtained was 92.58%. For precipitation method by using NaClO, the effects of three important factors including (NaClO/solution) ratio, temperature, and precipitation time were studied and reported. As a result, lead was precipitated in the form of PbO2 with concentrated grade of 72.03% and recovery of 92.31%. Furthermore, aluminum was used for cementation process to produce metallic Pb with grade of 96.11% and total recovery of 87.17%. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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