Optimization and kinetics studies of lead concentrate leaching using fluoroboric acid

• Autorzy: Sabouti Arash , Rezai Bahram , Hoseinian Fatemeh Sadat , Moradkhani Davood

Identyfikatory

DOI

10.5277/ppmp19023

• Języki publikacji: EN

Abstrakty

EN

In this study, the feasibility of lead dissolution from lead concentrate using fluoroboric acid by hydrometallurgical method was investigated in order to aviod the disadvantages of the pyrometallurgical processes. The effects of important operating parameters such as leaching time, liquid/solid ratio, stirring speed, temperature and fluoroboric acid concentration on the lead recovery were investigated using response surface methodology (RSM) based on the central composite design (CCD) model. The results show that the optimum conditions for the high lead recovery were: leaching time= 30 min, liquid/solid ratio= 10, stirring rate= 500 rpm, temperature= 80oC and fluoroboric acid concentration= 3.35 mol/L. More than 94% of lead was recovered in the optimum conditions. The results indicated that the liquid/solid ratio, fluoroboric acid concentration, temperature and leaching time were the most effective parameters on the process efficiency, respectively. Dissolution kinetics studies of lead in the fluoroboric acid were also evaluated. The chemical reaction was determined as the controlling mechanism of reaction at the shrinking core model. The activation energy was determined using Arrhenius model as 5.99 kJ/mol.

Słowa kluczowe

EN

lead concentrate; fluoroboric acid; hydrometallurgy; optimization; kinetics

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2019
• Tom: Vol. 55, iss. 4
• Strony: 1014--1027
• Opis fizyczny: Bibliogr. 31 poz., rys., tab., wz.

Twórcy

autor

Sabouti Arash

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

autor

Rezai Bahram

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

autor

Hoseinian Fatemeh Sadat

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

autor

Moradkhani Davood

• Department of Mining Engineering, University of Zanjan, Iran

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).