| Autor: |
Gáborová, Katarína, Achimovičová, Marcela, Škácha, Pavel, Márquez-Zavalía, María Florencia, Briancin, Jaroslav, Šestinová, Ol’ga |
| Předmět: |
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| Zdroj: |
Mining Engineering; Jul2023, Vol. 75 Issue 7, p93-95, 3p |
| Abstrakt: |
In this work, the structure, morphology, chemical composition and leaching of naumannite were studied. Mechanical activation in a planetary ball mill resulted in increasing its specific surface area. The influence of milling time on the particle size was studied by particle size distribution analysis and scanning electron microscopy. The leaching kinetics of nonactivated and mechanically activated samples in nitric acid (HNO3 ) were examined. The effect of leaching temperature on the recovery of silver was documented. The maximum yield of silver, 94 percent, was achieved after 120 min of leaching in 7.9 mol/L HNO3 at 50 °C for the sample activated for 30 min. Based on calculated activation energy values, a mixed leaching mechanism consisting of diffusion and surface chemical reaction as the rate-controlling steps of the solidliquid reaction was assessed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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