BENEFICIATION OF HEAVY MINERALS FROM BITUMINOUS SANDS RESIDUES BY DRY SCREENING

摘要

"BENEFICIATION OF HEAVY MINERALS FROMBITUMINOUS SANDS RESIDUES BY DRY SCREENING"ABSTRACT OF THE DISCLOSUREThe titanium and zirconium-based minerals,present in the first stage centrifuge tailings from the hotwater process for extraction of bitumen from bituminoussands, may be concentrated by a dry screening process. Thetailings are burned off to provide a dry, essentially carbon-free, mineral mixture. By screening the mixture into threestreams of different particle size range, silica and clays maybe rejected as coarse and fine materials respectively, whiletitanium and zirconium minerals may be concentrated in theintermediate stream. The titanium and zirconium concentratestream may be advanced to high tension and magnetic separationsteps known in conventional processing of heavy minerals, forfurther beneficiation.