PROJECT SHEET BWANA MKUBWA PINNED BED CLARIFIER COMMODITY CLIENT LOCATION PROJECT TYPE PROJECT SCOPE DURATION Copper Signet Engineering (Pty) Ltd, for RCS Mining Supplies Bwana Mkubwa Mine, Zambia LSTK Design, manufacture, supply, erect and commission 2005 The first ever full-scale Tenova Delkor Pinned-Bed Clarifiers to be used in a large-scale operation in Africa produce a clarified solution from the overflow of the counter-current decantation circuit, for further processing in a downstream Tenova Mining & Minerals is a total integrated solutions provider to the global mining, bulk materials handling and minerals beneficiation and processing sectors, offering innovative technological solutions and full process and commodity knowledge across the mining & minerals industry value chain. Tenova Delkor is an industry specialist in solid / liquid separation and mineral processing applications for the minerals, chemical and industrial markets. PROJECT SHEET solvent extraction (SX) circuit. The 8 m diameter Bateman Pinned-Bed Clarifiers, mounted in parallel, process 420 m3/h of acidic copper-sulphate solution containing up to 1,000 ppm of suspended solids. The clarified solution, containing as little as 20 ppm to 50 ppm of suspended solids, is pumped to the SX circuit, which requires a clarified feed to minimise crud formation. The units were fabricated and erected by a local Zambian contractor. Only the wedge-wire screen deck, polystyrene beads for the pinned-bed and instrumentation were supplied direct from South Africa. All the wetted parts were fabricated in 316L stainless steel to allow for the corrosive nature of the solution. The water-commissioning of the clarifiers comprised calibrating the instrumentation and determining the time-period between, and the duration of, backwash cycles. PROJECT STATISTICS Process capacity Feed Clarified solution 420 m3/h Acidic copper sulphate with up to 1,000 pm suspended solids 20 ppm to 50 ppm suspended solids TENOVA is a worldwide supplier of advanced technologies, products and engineering services for the metals and mining & minerals industries. [email protected] www.tenova.com TECHINT GROUP