MMG Century Mine, Australia – The use of BioPolymer flotation depressant to improve recovery of zinc.
Abstract: The Century mine produces flotation concentrate with around 500.000t of Zinc per year in a combined lead and zinc flotation process with graphite and silica as the main gangue material. Declining grades are announced for future operation enforcing the need to optimize the suite of flotation chemicals. Pionera F-100, a biopolymer, was evaluated as an alternative to dextrin as depressant. Lab test work and several plant trials showed graphite depression and improved zinc grades as well as lower silica content in the concentrate was achieved using Pionera F-100.