Leaching of chalcopyrite with acidified ferric chloride and carbon tetrachloride addition

• Published in: Minerals engineering Vol. 8; no. 10; pp. 1125 - 1134
• Main Authors: Havlík, T., Kammel, R.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.10.1995; Elsevier Science
• Subjects: activation energy; Applied sciences; CCl 4; chalcopyrite; Exact sciences and technology; ferric chloride; Hydrometallurgy; Kinetics of leaching; Metals. Metallurgy; Production of metals; Production of non ferrous metals. Process materials; X-ray diffractometry; CCl 4; activation energy; ferric chloride; Kinetics of leaching; X-ray diffractometry; chalcopyrite; Chalcopyrite; Extraction process; Carbon tetrachloride; Lixiviation; Kinetics; Ore concentrate; Copper; Experimental study; Iron chloride; Hydrometallurgy
• ISSN: 0892-6875; 1872-9444
• DOI: 10.1016/0892-6875(95)00077-4

Leaching characteristics of chalcopyrite concentrate from Cuba were investigated in acidified FeCl 3 and acidified FeCl 3 + CCl 4. Carbon tetrachloride was used as solvent for the elemental sulfur produced during leaching. The tests shows higher extraction for copper in the presence of CCl 4. Leaching in the absence of CCl 4 is a chemically controlled reaction with an apparent activation energy of 68.9 kJ/mol in the temperature range 45–80°C. For the diffusional controlled regime in the low temperature range (3.5–45°C) an apparent value of the activation energy of 1.1 Kj/mol has been estimated. In the presence of CCl 4 the activation energy value amounts to 31.2 kJ/mol in the temperature range 45–80°C which indicates a diffusion controlled process.