2014年3月20日星期四

Refractory binders classification

一、According to the chemical nature of the organic and inorganic binders.
  1. Inorganic binder:

  • Silicate - calcium silicate cement, water glass, clay, etc. combined.
  • aluminate - Ordinary calcium aluminate cement, calcium aluminate cement, aluminum, barium cement.
  • phosphate - phosphate, aluminum dihydrogen phosphate, sodium tripolyphosphate, sodium hexametaphosphate, chrome aluminum phosphate.
  • sulfate - magnesium sulfate, aluminum sulfate, ferric sulfate and the like.
  • chlorides - magnesium chloride, ferric chloride, aluminum chloride and the like. 
  • sols - silica sol, alumina sol, silica sol.

  2.  Organic binder:
  • natural organic matter - starch, dextrin, gum arabic, pulp waste, tar, bitumen, seaweed sodium.
  • organic synthesis - epoxy resins, novolac resins, resole resins, polystyrene, ethyl silicate, polyurethane resins and the like.

二、Sorted by hardening binders:
  • hydraulic binders - Portland cement, aluminate cement.
  • rigid gas-binding - sodium fluoride silicate, aluminum phosphate or dihydrogen phosphate plus magnesium oxide, silica plus calcium aluminate cement.
  • a thermosetting binding agent - phosphate, aluminum dihydrogen phosphate, resol resin.

三、Binding at different temperatures of the temporary and permanent binders.
  1. Temporary binding agents:

  • water-soluble binding agent - dextrin, powdered cellulose, carboxymethylcellulose, lignin sulfonic acid powder and liquid materials, polyvinyl alcohol powder crystals.
  • water-insoluble binding agent, - the hard bitumen, paraffin, polypropylene and the like.

 2.  Permanent bonding agent:
  • Carbon binding agent - tar pitch, phenolic resin.
  • aluminate cement.
  • silicate binder - sodium silicate, ethyl silicate and so on.
  • phosphoric acid and phosphate binders.
  • salts of chloride and sulphate binders.

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