Preparation method for vanadium pentoxide

Preparation method for vanadium pentoxide

  • CN 102,220,478 A
  • Filed: 04/01/2011
  • Published: 10/19/2011
  • Est. Priority Date: 04/01/2011
  • Status: Active Application
First Claim
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1. a method for preparing Vanadium Pentoxide in FLAKES is characterized in that, may further comprise the steps:

  • Prepare meticulous vanadium slag from the raw material vanadium slag;

    Described meticulous vanadium slag is carried out roasting leach the leach liquor that preparation contains vanadic acid sodium;

    AndPrepare Vanadium Pentoxide in FLAKES and obtain deposition vanadium mother liquid from the described leach liquor that contains sodium sulfate;

    Wherein,Describedly prepare meticulous vanadium slag from the raw material vanadium slag and comprise;

    The raw material vanadium slag is carried out fragmentation, carry out the vanadium slag after magnetic separation iron obtains scum and selects iron then;

    Select the vanadium slag behind the iron to carry out ball milling one time with described, once select powder to obtain meal then and as a fine powder of meticulous vanadium slag;

    A described meal sieved obtain plus sieve and minus sieve;

    Described minus sieve is carried out secondary ball milling, carry out secondary then and select powder to obtain the secondary meal and as the secondary fine powder of meticulous vanadium slag;

    Describedly described meticulous vanadium slag is carried out roasting leach the leach liquor that preparation contains vanadic acid sodium and comprise;

    Described meticulous vanadium slag is provided;

    In described meticulous vanadium slag, add yellow soda ash and obtain the roasting mixture;

    Described roasting mixture is carried out the roasting material that roasting obtains to contain vanadic acid sodium under the 700-850 degree celsius temperature;

    Described roasting material is carried out below the shrend to 100 degree centigrade;

    To carry out calcining matter pellet mill through the roasting material of shrend and obtain slurry;

    Described slurry is carried out water logging obtain to leach slurry;

    AndThe leaching slurry that is obtained is filtered the leach liquor that obtains filter residue and contain vanadic acid sodium;

    Described prepare Vanadium Pentoxide in FLAKES and obtain deposition vanadium mother liquid from the described leach liquor that contains sodium sulfate comprise;

    The described leach liquor that contains vanadic acid sodium is provided;

    In the described leach liquor that contains vanadic acid sodium, add ammonium sulfate, and regulate pH to pH value and be 1.5-2, under 90-100 degree centigrade temperature, heat afterwards, contain the sedimentary mixed solution of ammonium poly-vanadate with generation;

    The described sedimentary mixed solution of ammonium poly-vanadate that contains is carried out filtration washing acquisition ammonium poly-vanadate precipitation and deposition vanadium mother liquid;

    Described ammonium poly-vanadate is deposited in the thermal degradation oxidation generates Vanadium Pentoxide in FLAKES under 400-500 degree centigrade the temperature.

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