| Autor: |
Jiménez-Lugos, Cancio, Flores-Favela, Manuel, Romero-Serrano, Antonio, Hernández-Ramírez, Aurelio, López-Rodríguez, Josué, Cuéllar-Herrera, Lorena, Colin-García, Eduardo |
| Předmět: |
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| Zdroj: |
Metals (2075-4701); Aug2024, Vol. 14 Issue 8, p954, 11p |
| Abstrakt: |
This work focuses on the recovery of lead and silver from jarosite waste by a three-stage process: drying, roasting and reduction at 100 °C, 700 °C and 1400 °C, respectively. A flux mixture with 48 mass% CaO and 52% SiO2 was used for the reduction stage. A gas consisting of 70 vol% CO and 30 vol% CO2 was used as a reducing agent. To select the temperatures and the amount of flux and reducing agent, a characterization of the jarosite waste was carried out using thermogravimetry and high-temperature X-ray diffraction, as well as a thermodynamic study of the effects of the process parameters. The lead-rich metallic and slag phases were characterized by chemical analysis, SEM-EDS and XRD. In addition, the jarosite residue and the final slag were leached with an aqueous acetic acid solution to estimate their chemical stability. The results show a recovery of over 95% of the lead and silver and the formation of an environmentally friendly residual slag. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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