Combined chemical treatment and flotation process for recovering relatively high grade molybdenite from off grade or low grade ore materials
Abstract
Abstract AN OFF GRADE OR LOW GRADE MOLYBDENITE ORE MATERIAL CONTAINING INSOLUBLE NON-SULFIDE GANGUE AS WELL AS OTHER IMPURITIES IS TREATED BY A COMBINATION OF CHEMICAL AND FLOTATION STEPS TO PRODUCE A MOLYBDENITE CONCENTRATE OF COMMERCIALLY ACCEPTABLE GRADE. THE ORE MATERIAL, USUALLY A MOLYBDENITE FLOTATION CONCENTRATE, IS SUBJECTED TO ROASTING IN THE PRESENCE OF CONCENTRATED SULFURIC ACID AND IS THEREAFTER LEACHED TO REMOVE SOLUBLE IMPURITIES, SUCH AS COPPER, IRON, LEAD, AND PHOPHOUROUS. THIS TREATMENT DEACTIVATES THE INSOLUBLE NON-SULFIDE MINERAL GANGUE, AND MAKES IT POSSIBLE TO SELECTIVELY RECOVER, BY A SUBSEQUENT FLOTATION STEP, A MOLYBDENITE FROTH CONCENTRATE OF COMMERCIALLY ACCEPTABLE GRADE. CHLORINE GAS MAY BE SUBSTITUTED FOR SULFURIC ACID DURING THE ROASTING PROCEDURE, BUT WITH LESS SATISFACTORY RESULTS.
Inventors
- 👤 P Queneau
- 👤 J Prater
Bibliographic Details
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