Immersion type dissolution conversion method for solid kalium mine

Immersion type dissolution conversion method for solid kalium mine

  • CN 101,402,462 B
  • Filed: 09/21/2008
  • Issued: 08/22/2012
  • Est. Priority Date: 09/21/2008
  • Status: Active Grant
First Claim
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1. the immersion type dissolution conversion method of a solid kalium mine is characterized in that the step of this method comprises preparation, solvent preparation, solvent infiltration, immersion and stages of mining;

  • Said preliminary step is selected single solid kalium mine layer or builds the solid kalium mine " salt pan " that the clay divider wall forms sealing, analyzes Repone K, sodium-chlor, magnesium chloride, water and the water insoluble matter content of said solid kalium mine;

    Said solvent preparation steps is based on above-mentioned potassium chloride, sodium chloride, magnesium chloride, water and water insoluble matter content;

    Old bittern after the use salt pan carnallite system of shining is accomplished or bischofite and fresh water preparation obtain a kind of solvent;

    This solvent contains in said solvent gross weight 16-22% magnesium chloride and 0.4-6% sodium chloride, and surplus is other chemical substance and the water that contains in old bittern or bischofite and the fresh water;

    It is according to 0.45-2.40 rice that said solvent infiltrates step 3Above-mentioned solvent/rice 3The solid kalium mine ratio is injected described solid kalium mine layer or solid kalium mine " salt pan " with above-mentioned solvent, makes solvent flood the solid kalium mine layer just fully;

    Said soaking step is to let the solvent immersion solid potassium ore bed that infiltrates, and obtains containing the saturated solution of sodium-chlor, Repone K and magnesium chloride after soak time 20-72 hour;

    Described stages of mining is above-mentioned saturated solution to be extracted out obtain a kind of high potassium bittern from described solid kalium mine layer or solid kalium mine " salt pan ";

    Described solvent infiltrates step, soaking step and stages of mining to be repeated to implement, and the solid potassium content is lower than 0.30 weight % in said solid kalium mine layer or solid kalium mine " salt pan ".

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