What are the types of phosphate binders used in refractory materials?

(1) an orthophosphate binder, that is, a binder containing a compound of a phosphorus atom, such as aluminum dihydrogen phosphate (AL(H2PO4)3), aluminum monohydrogen phosphate (Al2HPO4) 3);

(2) A polycondensation phosphate binder, that is, a phosphate compound containing two or more phosphorus atoms, such as sodium tripolyphosphate (Na5P3O10), sodium hexametaphosphate ((NaPO3)6) and the like. The orthophosphate binder can be named according to the compound name, and the following are mainly the following: aluminum phosphate binder, zirconium phosphate binder, magnesium phosphate binder, chromium phosphate binder and complex phosphate binder. The polycondensation phosphates suitable as refractory binders are mainly sodium pyrophosphate (Na4P2O7), sodium tripolyphosphate, sodium hexametaphosphate, sodium polyphosphate (Na2P4O11) and the like.

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