Process for preparing low-ammonia environmentally-friendly resin precoated sand

Process for preparing low-ammonia environmentally-friendly resin precoated sand

  • CN 106,563,766 A
  • Filed: 11/03/2016
  • Published: 04/19/2017
  • Est. Priority Date: 11/03/2016
  • Status: Active Application
First Claim
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1. the preparation technology of low ammonia environment-friendly resin precoated sand, it is characterised in that comprise the following steps:

  • The first step, will burn sand and is heated to 140-160 DEG C;

    Second step, adds Enviorment-protective Phenolic Resin, additive A to be blended the time for 20-40s;

    3rd step, then by sand temperature drop to 110-130 DEG C, add additive B and/or additive A, non-Ammonia firming agent and/or crowLip river tropine, is blended 30-60s;

    4th step, cooling of blowing a cold wind over blows a cold wind over the persistent period for 40-90s;

    5th step, adds interleaving agent, is blended the time for 10-20s;

    6th step, sieves, and is cooled to 30~

    60 DEG C in further cooler, and preferably 30~

    40;

    7th step, sieves;

    8th step, loads the woven bag containing plastic inner bag, obtains low ammonia environment-friendly resin precoated sand.

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