The solvent extraction of Cobalt with tertiary amines

Imperial Users onl

A Changing Environment: Reflections on 50 Years of Hydrometallurgy

Looking back over the past half century, it can be seen that the growth in the importance of hydrometallurgy for the production of non-ferrous and precious metals almost exactly parallels the rise of the environmental movement and its principal NGOs, such as Greenpeace and Friends of the Earth. The paper will review important landmarks in the development of the science and technology of hydrometallurgy and show how many of these have been influenced by pressures on the industry brought about by environmentalists. Successful innovations as well as commercial failures will be considered and reasons for the success or failure will be analysed and lessons drawn to guide future developments

THE SCORODITE PROCESS: A TECHNOLOGY FOR THE DISPOSAL OF ARSENIC IN THE 21ST CENTURY.

IN . (CASTRO S.H., F. AND SANCHE

Copper-gold ore processing with ion exchange and SART technology

Anglo Asian Mining has developed a 50,000 oz Au/yr open pit gold mine at Gedabek in Western Azerbaijan. The deposit at Gedabek is a copper-gold porphyry, comprising both oxide and sulphide ore mineralisation, which is being mined at the rate of about 1 million tons of ore per year. Ore processing is by conventional cyanide heap leaching, which produces a pregnant leach solution (PLS) containing 1-2 ppm of gold, together with 1000 ppm or more of copper. The PLS is treated by column ion exchange, using Dows gold-selective MINIX resin. Loaded resin is stripped with an acidic thiourea solution, from which gold and silver are electrowon on to stainless steel mesh cathodes. Copper concentrations in the leach solutions are controlled by passing part of the PLS flow through a SART process, where the acronym stands for Sulphidisation, Acidification, Recycling and Thickening . The product from the SART process is a copper/silver sulphide precipitate, which is thickened, filtered and dried and then sold for copper smelting. © 2014 Elsevier Ltd. All rights reserved