Method for separating valuable components of monazite slags

Method for separating valuable components of monazite slags

  • CN 102,925,681 B
  • Filed: 11/27/2012
  • Issued: 02/11/2015
  • Est. Priority Date: 11/27/2012
  • Status: Active Grant
First Claim
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1. a separation method for solitary rock ballast valuable constituent, is characterized in that it comprises the following steps:

  • (1) acidleach;

    in solitary rock ballast (㎏

    );

    the ratio of acid (L)=1;

    1 ~ 15, solitary rock ballast being joined concentration is in the sulphuric acid soln of 0.25mol/L ~ 0.5mol/L, be heated to 40 DEG C ~ 100 DEG C, stir 5 hours ~ 8 hours, cooling leaves standstill clarification 4 hours ~ 8 hours, and siphon supernatant liquor obtains the solution containing uranium, thorium, rare earth valuable element;

    (1) step carries out secondary pickling afterwards, in solitary rock ballast (㎏

    );

    the ratio of acid (L)=1;

    1 ~ 3, be that the sulphuric acid soln of 0.25mol/L ~ 0.5mol/L joins in the slip after siphon supernatant liquor by concentration, be heated to 40 DEG C ~ 100 DEG C, stir 5 hours ~ 8 hours, cooling leaves standstill clarification 4 hours ~ 8 hours, and siphon supernatant liquor and step (1) gained supernatant liquor merge the solution obtained containing uranium, thorium, rare earth valuable element;

    Pickling is carried out after secondary pickling, in solitary rock ballast (㎏

    );

    the ratio of acid (L)=1;

    1 ~ 3, be that the sulphuric acid soln of 0.10mol/L ~ 0.25mol/L joins in the slip after siphon supernatant liquor by concentration, be heated to 40 DEG C ~ 100 DEG C, stir 0.5 hour ~ 1 hour, cooling leaves standstill clarification 4 hours ~ 8 hours, and siphon supernatant liquor and step (1) gained supernatant liquor merge the solution obtained containing uranium, thorium, rare earth valuable element;

    (2) press filtration;

    the slip pump after siphon supernatant liquor is squeezed into plate-and-frame filter press press filtration to without solution outflow, filtrate and step (1) in supernatant liquor merge;

    (3) wash;

    the filter residue of plate-and-frame filter press is added water washing, water inlet is stopped to during filtrate pH value 2 ~ 3, press dry filter residue, water lotion and step (1) in supernatant liquor merge, obtain the limpid aqueous solution containing uranium, thorium, rare earth and the filter residue containing the ore such as monazite, zircon and residual uranium, thorium, rare earth compound.

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