Pressure acid leaching of sphalerite concentrate. Modeling and optimization by response surface methodology

• Autorzy: Guler E.

Identyfikatory

DOI

10.5277/ppmp160139

• Języki publikacji: EN

Abstrakty

EN

The zinc leaching from sphalerite concentrate using oxygen under pressure in sulfuric acid solution was primarily studied and evaluated. The effects of important leaching parameters such as oxygen partial pressure, temperature, solid/liquid ratio and leaching time on leaching efficiency, Zn concentration and Fe extraction were investigated. Response surface methodology based on central composite rotatable design technique was used to optimize the leaching process parameters in order to obtain a suitable leach solution with high Zn leaching efficiency considering further processes such as precipitation of contaminating metal ions and electrolysis. The optimum leaching condition for maximum Zn leaching efficiency and Zn concentration with minimum Fe extraction was determined as follows: oxygen partial pressure of 12 bars, temperature of 150 °C, solid/liquid ratio of 0.20 and leaching time of 89.16 minutes. The achieved experimental results for Zn leaching efficiency, Zn concentration and Fe extraction under the optimum conditions were as 94%, 80 g/dm3 and 8.1% respectively. The experimental results corresponded well with the predicted results of quadratic polynomial models.

Słowa kluczowe

EN

pressure leaching; sphalerite concentrate; optimization; response surface methodology; central composite rotatable design

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2016
• Tom: Vol. 52, iss. 1
• Strony: 479--496
• Opis fizyczny: Bibliogr. 42 poz., rys., tab.

Twórcy

autor

Guler E.

• Dokuz Eylul University, Faculty of Engineering, Mining Engineering Department, 35390, Buca, Izmir, Turkey

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą nauki.