1. Çinko atıklarından çinko geri kazanımı için sülfatlayıcı kavurma ve su liçi optimizasyonu.
- Author
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Topçu, Mehmet Ali
- Abstract
Zinc wastes are economically valuable resource for zinc production. However, they are also classified as hazardous waste due to the heavy metal they contain. In this study, the effect of sulphating roasting and water leaching conditions on metal solubility (Zn, Pb, Fe, and Ca) were investigated. After roasting tests with ammonium sulfate at various temperatures and durations, the mineralogical structure of each roasted sample was examined. According to the chemical analysis, it was determined that the waste contained 16.6% Pb, 12.5% Zn, and 7.5% Fe. It was determined that roasting the waste with ammonium sulfate transforms the ZnFe2O4 ve Zn2SiO4 structures of the waste into zinc sulfate (ZnSO4). Considering the process economy and energy savings, the optimum operating conditions for approximately 91% zinc recovery was determined as 1:2 (g:g) waste/ammonium sulfate ratio, 625 °C roasting temperature, 4 hours roasting time, 625 °C leaching temperature, and 2 hours leaching time. Also, under the optimum conditions it was found that lead did not dissolve, and the dissolution rates of calcium and iron were 41% and 16.8%, respectively. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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