Labor and technical issues delayed the start of concentrate production from January until May, although the mine began producing electrowon
copper in early 2013.
Copper is electrowon
from the leach solution to produce copper cathodes and a bleed stream is fed to the cobalt recovery circuit where it passes through several purification steps to remove metal impurities.
56 percent interest in Cerro Verde, an open-pit mine currently producing both electrowon
copper cathodes and copper concentrates.
The nickel and cobalt are extracted using ion exchange (IX) resin and then electrowon
, producing nickel metal.
The process produces a high purity electrowon
cathode and cobalt sulphide.
7% (mainly due to an increase in electrowon
production) and secondary production (from scrap) increased by 3.
Several researchers have proposed a simplified flow sheet, whereby gold is directly electrowon
from the pregnant heap-leaching solutions, eliminating the gold adsorption and desorption steps.
The resulting electrowon
gold dore (9999 fineness) is shipped to a South African refinery.
US operations: From a little over 10,000 t/y in 1968, US production of electrowon
copper has grown more than 50-fold.
Los Bronces is an open-pit mine that produced 170K-mt Cu, 3,000-mt Mo concentrate, plus 12Kmt electrowon
Cu cathode in 2000.
This will make Radomiro Tomic the largest electrowon
cathode operation in Chile.
The $220M project will increase Morenci's electrowon
cathode production capacity to 820M lb/yr.