The Recovery of Metallic Tin from an Industrial Tin-Bearing By-Product Containing Na<sub>2</sub>SO<sub>4</sub> by Reduction Smelting Process
Tin was recovered in metal from an industrial tin-bearing byproduct containing Na<sub>2</sub>SO<sub>4</sub> by carbothermic reduction smelting, and the effects of basicity (Na<sub>2</sub>O/SiO<sub>2</sub>), temperature, and reaction time on the recover...
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| Autores principales: | , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/ab63709ea9e842a5a8504706b707ad16 |
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| Sumario: | Tin was recovered in metal from an industrial tin-bearing byproduct containing Na<sub>2</sub>SO<sub>4</sub> by carbothermic reduction smelting, and the effects of basicity (Na<sub>2</sub>O/SiO<sub>2</sub>), temperature, and reaction time on the recovery of tin were studied. Na<sub>2</sub>SO<sub>4</sub> was reduced by carbon and formed into sodium silicate slag (Na<sub>2</sub>O–SiO<sub>2</sub>) in the presence of SiO<sub>2</sub>. Tin content in slag decreased with the increase of Na<sub>2</sub>O/SiO<sub>2</sub> ratio in slag, temperature, and reaction time, but the recovery of tin was affected by volatilization of tin in high temperature and high silica region of basicity. In this study, the maximum recovery rate of tin was 94.8% at the experimental condition of 1200 °C, 2 h, and 0.55 of Na<sub>2</sub>O/SiO<sub>2</sub> ratio. The major impurities in produced metal were Bi, Pb, Cu, Fe, and most of Bi, Pb, Cu were distributed to the metal phase, but the distribution of Fe was closely related to basicity. |
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