The Trident project, located approximately 150 kilometres west of Solwezi in north-west Zambia, is comprised of the Sentinel copper mine development and the Enterprise nickel mine development.
Trident was obtained through the acquisition of Kiwara PLC in February 2010. Enterprise lies approximately 12 kilometres to the north of Sentinel. Its processing facility will share the Sentinel infrastructure and tailings will be discharged to the Sentinel tailings thickeners and tailings storage facility.
Mining and Processing
Ores from Enterprise will be transported to the Sentinel processing facility, where they will be treated in a
SAG – ball milling circuit followed by flotation with a treatment rate of up to 4 million tonnes per annum, Enterprise is being designed to produce an average of 38,000 tonnes of nickel in concentrate per annum with scope to increase to 60,000 tonnes when nickel market conditions allow. The Enterprise circuit will also be able to process additional copper ore as part of Sentinel in the time periods when it is not being used to process nickel.
A dedicated primary crusher, crushed ore stockpile and conveying system will be provided for the Enterprise ores; crushed ore will be milled in a SAG and ball milling circuit, and the ground product floated in a circuit comprising talc pre-float, nickel rougher flotation, and two stages of cleaning. The talc pre-float will be operated without reagent addition to produce a talc concentrate containing very little nickel, which will be discarded to final tailings. Final concentrate at a grade of between 24 and 30% nickel, will be thickened and filtered in a dedicated concentrate handling facility.
The Enterprise processing facility will share all the Sentinel infrastructure and tailings will be discharged to the Sentinel tailings thickeners and tailings storage facility.