extraction processing grinding from low grade ores

BACKGROUND OF THE INVENTION. This invention relates to aprocessfor theextractionand recovery of metals fromores, particularlylow grade ores, bygrindingtheoresto an extremely small particle size, forming a substantially homogeneous aqueous slurry of the particles, and extracting metals from the slurry with a solvent in a counter-current liquid-slurryextractionstep

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  • us4268307a method ofextractionof metalsfrom low grade

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    Accordingly, it is an object of the present invention to provide a continuousprocessfor theextractionof metalsfrom low grade ores. It is a further object of the invention to provide aprocesswherein theoreis ground to a sufficiently small particle size to permit handling of slurries of theoreas liquids

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    Stage-grindingweak magnetic separationprocessis suitable forextractionof ironfrom low grademagnetite with fine grain. Single Weak Magnetic SeparationProcessIt mainly points at theextractionof ironoreswhich are difficult to increase its fineness or with many SiO2 impurities

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