Technology for granulating powder

Technology for granulating powder

  • CN 102,107,127 B
  • Filed: 01/11/2011
  • Issued: 04/22/2015
  • Est. Priority Date: 01/11/2011
  • Status: Active Grant
First Claim
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1. powder is prepared into a method for spheric granules, it is characterized in that comprising the steps:

  • powder is dispersed in the liquid phase be made up of binding agent, tackifier and decentralized medium and obtain decentralized photo;

    The system immiscible with decentralized medium is selected to be continuous phase;

    Under stirring, slowly added in continuous phase by the decentralized photo prepared, by adjusting rotary speed size adjustment spheric granules particle diameter, then temperature range is heating, cooling or add curing agent or catalyst when-25 DEG C-250 DEG C, and solidification obtains powder spheric granules;

    Described powder comprises mineral powder;

    metal simple-substance, metal oxide, non-metal simple-substance, nonmetal oxide or inorganic compound;

    Organic high molecular polymer powder;

    the mixture of plastics or waste resin powder or above-mentioned two kinds and above different powder;

    The volume ratio of decentralized photo and continuous phase is 1;



    When decentralized medium is water-soluble, add in continuous phase span class, tween class oil-soluble dispersant one or more;

    When decentralized medium is oil-soluble, continuous phase is the salt solution of pure water or variable concentrations;

    Starch is added in continuous phase, gelatin, polyvinyl alcohol, polyvinylpyrrolidone, polyacrylate, polyvingl ether, PPOX, methylcellulose, CMC, hydroxymethyl-propyl cellulose, carboxymethyl cellulose, hydroxyethylcellulose, hydroxypropyl methylcellulose, water soluble polymer and/or the tricalcium phosphates such as styrene-maleic acid copolymer ethyl vinyl acetate-maleic acid, calcium hydroxy phosphate, calcium carbonate, magnesium carbonate, barium sulfate, brium carbonate, magnesia, calcium pyrophosphate, magnesium pyrophosphate, magnesium hydroxide, aluminium hydroxide hydroxyapatite or talcum powder slightly water-soluble inorganic matter are as dispersant,Prepared spheric granules particle size range is from micron order to grade;

    Spheric granules particle size is regulated by stirring intensity, two-phase proportion, decentralized medium character or consumption;

    After powder is prepared into spheric granules, the character of former powder is constant;

    Described binding agent be can and powder between there is hydrogen bond, Van der Waals force, covalent bond make a concerted effort and/or the monomeric substance of ionic bonding forces;

    Described monomer is reactive monomer, there is more than one polymerizable double bond in its molecule;

    Or monomer self is with Liang Ge condensation functional group;

    Or monomer is that two or more has can the combination of material of condensation functional group.

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