Production of zinc powder from Co-Zn plant residue using selective alkaline leaching followed by electrowinning

• Autorzy: Kamran Haghighi H. , Moradkhani D. , Sardari M. H. , Sedaghat B.

Identyfikatory

DOI

10.5277/ppmp150204

• Języki publikacji: EN

Abstrakty

EN

Annually, gigagrams of cobalt residues, called hot filter cake (HFC), are produced from the Co neutralization step at Iranian zinc plants. With respect to the composition of HFC )i.e., 15-25% Zn, 0.5–1.5% Co, 3–8% Mn(, it can be used as a secondary source of zinc, cobalt and manganese. In the present study, for the first time, treatment of HFC for separation and recovery of zinc has been studied. The residue was treated by employing selective alkaline leaching, in order to recover the maximum amount of zinc, followed by zinc electrowinning process. As a results, a solution was obtained from alkaline leaching under the optimum condition of 75 °C, sodium hydroxide of 8 M, solid-to-liquid ratio dm3 of 1:10, and stirring speed of 600 rpm, having zinc recovery of 88.5 %. In the following step, the electrowinning process, under the optimum working conditions being current density 350 A/m2 and time 10 hours, was carried out to produce a zinc powder with high purity of 99 percent. Finally, a simple and effective conceptual flow diagram was proposed for the process.

Słowa kluczowe

EN

zinc powder; HFC; alkaline leaching; sodium hydroxide; alkaline electrowinning

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2015
• Tom: Vol. 51, iss. 2
• Strony: 411--425
• Opis fizyczny: Bibliogr. 29 poz., rys., tab.

Twórcy

autor

Kamran Haghighi H.

• Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran
• University of Applied Science and Technology, Calcimin Branch, Zanjan, Iran

autor

Moradkhani D.

• Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran

autor

Sardari M. H.

• Research & Engineering Co. for Non-ferrous Metals, Zanjan, Iran
• Department of Mineral Processing, Faculty of Engineering, University of Sahand Technology, Tabriz, Iran

autor

Sedaghat B.

• Research & Engineering Co. for Non-ferrous Metals, Zanjan, Iran

Bibliografia

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