English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

the Northwestern Province of Zambia, with an annual production in the region of 250 000 t of copper and 160 000 ounces of gold. Ore mined from the epigenetic vein-hosted deposit is classified into three ore types based on the extent of oxidation and supergene enrichment. Sulphide, oxide, and mixed ore are fed to separate mineral processing circuits tailored for recovery of the dominant copper minerals in each. After comminution to a target grind size of 80% passing 150 μm, each ore type is subjected to flotation to recover the copper sulphide minerals (chalcopyrite, bornite, chalcocite, covellite). The oxide float tails and a large proportion of the mixed float tails are then treated by atmospheric leaching to extract copper from the remaining copper-hosting minerals, which include cuprite, malachite, chrysocolla, and delafossite. Some native copper is recovered by flotation and some of it is recovered by leaching. A small portion of the combined concentrate from all circuits is subjected to high-pressure leaching and the rest is sent to the smelter. Sulphuric acid produced during smelting is used for the atmospheric leach. With assistance from Dr Will Goodall and colleagues from MinAssist and iMinSolutions, Kansanshi set up an on-site mineralogical section within its processing department in 2015 to provide applied mineralogy services for continuous plant performance improvement. Most features of the set-up that Goodall outlined in 2015 have been maintained to date, with the Zeiss MinSCAN being used for automated mineralogical analysis of weekly composite samples of the key streams for each circuit. In this work, sulphide, mixed, and oxide flotation are considered as three separate circuits, and the atmospheric leach that processes oxide and mixed flotation tails is considered as a fourth circuit. Detailed weekly mineralogy reports for each circuit have helped to explain variation in performance, and have underpinned a number of successful recovery and grade improvement projects. Kalichini et al., (2017) described some of the key successes of the Kansanshi mineralogy programme, focusing on the value delivered by the programme in the sulphide circuit. Work involving Kansanshi ore mineralogy that has been reported to date has typically focused on mineralogy or processing associated with a particular circuit at Kansanshi (Corin et al., 2017; Kalichini et al., 2017; Jacobs, 2016; Pacquot and Ngulube, 2015; Kalichini, 2015; Pérez-Barnuevo, Pirard, and Castroviejo, 2013). The objective of this paper is to provide a broader perspective, analysing variation in mineralogy across the four circuits and relating this to the operating strategies and performance of each. Relationship between ore mineralogy and copper recovery across different processing circuits at Kansanshi mine