A concentration process of zinc silicated minerals, particularly willemite
and calamine concentration, by single operations, or conventional steps
of ore treatment, some of which include the following: Preparation of
stockpiles of different mineralogical and contents compositions,
crushing, screening, storage, dense separation, washing, homogenization,
magnetic separation, grinding, classification, rubbing, conditioning,
flotation, thickening, filtering, calcination, storage and waste
deposition.