·COPPER CIRCUIT ZINC CIRCUIT Feed L I Thickener I 1 i Filtration J 1 Copper Cone [ Thickener J Ii mr on I l Zinc Cono Schematic flowsheet for Kipushi concentrator Southern Group Lubumbashi The plant treats million tons of Cu Zn ore every year and produces 160 000 tons of copper concentrate and 164 000 tons of zinc concentrate
·The plant has operated at up to 50 000 tpa Cu production at a cash cost US$ of as low as $/lb of copper from mining through to metal production Dreisinger et al 2002b 2 Phelps Dodge total pressure oxidation plant Marsden et al 2003
·Copper SX/EW Basic Principles & Detailed Plant Design 51 ORGANIC SELECTIVITY • The only significant element extracted by oxime copper extractants is ferric iron • Copper iron ratio of 500 2500 under ideal conditions depending on the particular extractant • Actual chemical transfer is affected by the Cu Fe ratio in the aqueous feed
·Copper and cobalt production from oxide ore types in the African Copperbelt by agitation leaching followed by solvent extraction SX and electrowinning EW has been practiced for many years The Tailings Leach Plant at Nchanga in Zambia was commissioned in 1974 and is still in operation today1 In recent years more of these types of plants have been constructed
·The overall leaching solvent extraction and final metal production processes can be summarized in the following simplified flowsheet LEACHING PROCESS / SOLVENT EXTRACTION / FINAL COPPER RECOVERY Copper leaching R e c y c l e d l e ac h s o l u t i o n Copper extraction S t r i p p e d L I X ® R e a g n t Copper stripping A q u o u s s tri p
·Metso Outotec offers optimised solutions and complete plants for the production of high quality copper cathodes through innovative leaching solvent extraction and electrowinning technologies Our technology package for leaching SX EW plants may contain basic and/or detailed engineering as well as proprietary and key equipment supply
Figure 1 shows an example of the most common porphyry copper ore type beneficiation flowsheet Porphyry ores although generally contain small amount of copper below 1% belong to easy to float
For example Backes et al 2021 carried out a complete life cycle assessment of steel production in an integrated German steel plant Ma et al 2022 described the life cycle assessment for two
·Because cobalt is produced as a by product of either nickel or copper production The second generic flowsheet starts with the flotation of copper and cobalt minerals The leaching of concentrate tailings has been practised since the early 1970s at KCM s Tailings Leach Plant in Chingola The copper content is leached at a pH of about 1
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