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RECOVERY OF RARE EARTHS FROM CONCENTRATES CONTAINING FLUORINE

  • US 20180209015A1
  • Filed: 07/21/2016
  • Published: 07/26/2018
  • Est. Priority Date: 07/21/2015
  • Status: Active Grant
First Claim
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1. A method of recovering a mineral from a fluorine-containing ore or concentrate, the method comprising:

  • treating the fluorine-containing ore or concentrate by carbochlorination in the presence of a carbon-containing material and a fluorine capturing agent to form a mineral chloride and a treated ore or concentrate, wherein a partial pressure or activity of the fluorine capturing agent substantially prevents formation of rare earth fluorides throughout the treating step;

    contacting the treated ore or concentrate with a dilute HCl leach solution to solubilize the mineral chloride in the leach solution; and

    recovering the mineral,wherein the mineral is selected from the group consisting of a rare earth mineral, a scandium mineral, a niobium mineral, a tantalum mineral, a zirconium mineral, a hafnium mineral, a titanium mineral, and combinations thereof.

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