Pressure leaching of shale ore in oxygenated sulphuric acid.
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Wroclaw University of Technology
Jerzy Wódka   

Wroclaw University of Technology, Faculty of Chemistry, Division of Chemical Metallurgy, Wybrzeze Wyspianskiego 27, 50-307 Wroclaw, Poland
Publication date: 2007-01-01
Physicochem. Probl. Miner. Process. 2007;41(1):349–364
The effect of initial temperature, sulphuric acid concentration and oxygen partial pressure on pressure leaching of shale fraction of copper ore is presented. Leaching was performed in the autoclave in the temperature range of 100 -1800C using oxygen as an oxidizing agent. Tailigs from 1st cleaning of Lubin Concentrator (ZWR Lubin) were used as a shale material exhibiting elevated contents of metals and organic carbon. Process was performed at sulphuric acid concentration from 20 to 50 g/dm3. The high efficiency of pressure leaching for copper, cobalt, nickel, iron and zinc from polimetallic shale middlings of the Lubin Concentrator was revealed.