Work is moving along at two new mining plants at Nchanga Division of Zambia Consolidated Copper Mines (ZCCM). The UK mining and engineering specialist Techpro Mining & Metallurgy of Ashford, Kent, has been appointed to undertake several major assignments for ZCCM in Zambia with a total capital value of $57.5m.
The company is currently working on the management, design, procurement and construction of two new plants at Nchanga Division, using the latest flotation-column technology.
The smaller of the two plants, with a capital cost of $1.5m, features two 2.5-metre-diameter columns for recovering solvent extraction reagent from the existing SX plant, with a design capacity of 800 cubic metres per hour of electrolyte. It is scheduled for commissioning later this year (1994).
Larger plant in 1985
Early in 1995, the second, larger part of the project, an $18m plant, is scheduled to come on stream.
With six 4-metre-diameter columns for rougher flotation and two 2.5-metre-diameter columns for cleaner flotation of residues from the existing copper leach plant, the plant incorporates thickening and filtration equipment and will be able to treat more than 2,000 tonnes per hour of dry solids.
Work on the new projects follows the completion of a new sulphide rougher flotation plant at Nchanga, augmenting the existing plant.
Techpro was responsible for the design, procurement, construction, project management, commissioning and provision of operating and training manuals at the $8m project.
The installation includes a new building, a control room, pumps, piping, electrics and other services. The key feature is three streams of six 1,500-cubic-foot flotation cells, capable of handling 1,430 dry tonnes per hour. Provision has been made for a...