Kolwezi tailings project
Coordinates: 10°42′42″S 25°23′48″E / 10.711551°S 25.396614°E The Kolwezi tailings project is a major project in the Kolwezi mining area of the Democratic Republic of the Congo (DRC) to recover copper from the tailings, or processed ore, from mining in the region since the 1950s. The project was developed by the Canadian mining companies Adastra Minerals and then First Quantum Minerals between 2004 and 2009, when the DRC government revoked First Quantum's license.
Kolwezi is a town of about 200,000 people in the Katanga Province of the DRC. It has been a mining center for 100 years. The main river valley is filled with tailings, and there are extensive pits, waste rock dumps and tailings deposits. The air is polluted by wind-blown tailings. Infrastructure such as roads, water supply and management, schools and hospitals was once good, but as of 2004 it was poorly maintained. The state mining company Gécamines no longer provided the high level of social support of the past, and there was very high unemployment. The labor force is skilled and had high expectations of the tailings recovery project.
The state-owned Gécamines started operating a mineral concentrator at Kolwezi in 1952, taking ores from the western Katanga open pit mines and producing copper concentrates. The tailings still contain significant amounts of metal. The project entails construction of a plant to process the copper and cobalt tailings in the Kingamyambo tailings dam and the Musunoi river tailings, which have an estimated total metal content of 1,676,000 tonnes of copper and 363,000 tonnes of cobalt. A Durban company, Metso ND Engineering, was selected to build the equipment. It was expected to produce around 70,000 tonnes per year of copper metal and up to 14,000 tonnes per year of cobalt hydroxide.
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