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GOLD CIL PLANT 1.3Mtpa
Client: BANRO Corporation
In a nutshell
US$ 86,7 Million
2009 to 2011
Contractor responsible for the EPCM, Design, Supply, Ship Construction, Erection & Commission
1,3Mtpa Oxide Ore
Remote location in mountains of the North of the DRC. Moving 2nd Plant from Australia through to the DRC. 10 kilometers of overland pipelines for raw water, tailings, return water and process water.
The Project commenced in August 2009, after completion of the Feasibility study, with a focus on the development of Phase 1 of the Twangiza Gold Mine. The first phase will be limited to the mining and processing of 1.3Mtpa of oxide Ore.
The processing plant comprises portions of two second-hand plants which were purchased in Australia, respectively
a crushing, screening and grinding section and a leach, adsorption and elution section. The proposed Twangiza Process Plant design is based on a well known and established Gravity/Leach & CIP technology, which consisted of three-stage crushing, ball milling, gravity recovery of free gold followed by leaching/adsorption of gravity tailings, elution & gold smelting and tailings disposal. However during further testing CIP tanks were changed to CIL which result in better recovery of the ore.
The crushing plant is designed to treat ore at a rate of 210tph to a product size of 100% passing 200mm through a mineral sizer. Ore from the mineral sizer will be transferred to a rotary scrubber, where process water will also be added to produce discharge slurry with a 50% solids density by weight. The Secondary Crusher will reduce the ore size to a product of 100% passing 37 mm. The milling circuit will consist of one primary (Mill 1) and one secondary (Mill 2) ball mills, which will be capable of treating 174 tph of oxide ore.