Mineralogical characterization and purification of a scheelite ore concentrate containing substantial concentrations of calcium carbonate and calcium phosphate is reported. The ore concentrate contained about 65%, CaWO_4; 18% CaCO_3, 14 % Ca_(10)(PO_4)_6(OH)_2 and 3% SiO_2. In addition to these major phases, the ore concentrate also contained trace concentrations of toxic elements such as arsenic, lead and uranium which were associated with apatitic part of the ore. A design of experiment approach was used to study the preliminary purification of the ore concentrate in HCl.
展开▼
