ball mill cu zn pb industry in hubli burkina faso
2 The technical report entitled “Technical Report on the Perkoa Mine Burkina Faso” dated April 12 2018 is the current technical report for the Perkoa property 3 The Perkoa Underground Mine Mineral Reserve estimate is reported based on planned stopes with a net smelter return cutoff grade of US100tonne with metal prices of US1