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    STUDIA CHEMIA - Issue no. 1-2 / 2001  
         
  Article:   THE COPPER, LEAD AND ZINC RECOVERY OF THE MINERALS PARTIAL OXIDATED WITH CHELATING ACTION REAGENTS.

Authors:  GABRIELA OPREA, CRISTINA MIHALI.
 
       
         
  Abstract:  The flotation of copper minerals with salicylaldoxyne shows a good selectivity of the reagent. 8-hydroxyquinoline (oxyne) is less selective because part of calcite floates and decreases the copper content of the concentrate. In this case is demonstrated the utility of the flotation in two steps when the recovery percentage of the copper increases in the concentrate and decrease in the sterile. The flotation of the lead and zinc minerals partial oxidated with oxyne shows an increase in the recovery of lead and zinc when the flotation in two stages is replaced by the flotation in three stages, better then the replacing of one stage with two stages flotation. For copper, lead and zinc partial oxidated minerals the results obtained using oxyne are net superior to those obtained by preliminary sulphating of the surface.By using of the oxyne the recoveries increases as well as the metal content.  
         
     
         
         
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