Method for producing mixed gypsum powder by utilizing citric acid waste residue one-step process

Method for producing mixed gypsum powder by utilizing citric acid waste residue one-step process

  • CN 102,584,051 A
  • Filed: 02/10/2012
  • Published: 07/18/2012
  • Est. Priority Date: 02/10/2012
  • Status: Active Application
First Claim
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1. method of utilizing Hydrocerol A waste residue single stage method to produce the mixed gypsum powder is characterized in that may further comprise the steps:

  • 1), sizes mixing;

    press Hydrocerol A waste residue and water by weight being the mixed of 1;

    1-2, and fully stir and size mixing;

    2), dehydration;

    , make that free water content is 15-17% in the material of dehydration back with above-mentioned homogenate centrifuge dehydration in whizzer;

    3), incorgruous processing;

    Producing of A, α

    Ban Shuishigao;

    the back material that will dewater is divided into two portions, gets a part and places airtight autoclave, feeds steam, keeps 110-130 ℃

    of temperature in the kettle, pressure 0.1-0.3 Mpa, time 6-8 hour, steams to press and changes brilliant;

    To change brilliant back material and change in the fluidizing furnace and dry, bake out temperature is 110-150 ℃

    , and drying time is 5-7 hour;

    B, β

    semi-hydrated gypsum are produced;

    get raw material after another part centrifuge dehydration and directly get into dryer and dry, bake out temperature is 110~

    140 ℃

    , drying time 3-6 hour;

    Oven dry back material gets into calcination process, and calcining temperature is 160~

    180 ℃

    , calcines and obtains the β

    semi-hydrated gypsum powder after 1-3 hour;

    4), the compound abrasive dust;

    the α

    Ban Shuishigao and the β

    semi-hydrated gypsum of above-mentioned acquisition are sent in the ball mill by weight the ratio of 30-45;

    70-55, with the compound ball milling to the 150-200 order.

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