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Alumina magnesia castable

Alumina magnesia castable with high aluminium aggregate, high aluminum powder, magnesium powder as basic quality, with water glass as the novel castable.

The bonding strength of water glass has good low temperature and high temperature, and it is also a kind of electrolyte containing Na+, glue solution good effect on casting material, adding water glass changed the flow properties of casting, obviously improving the construction performance.

Sodium fluosilicate as coagulant, the chemical reaction process of sodium fluosilicate hydrolysis, the formation of hydrogen fluoride, followed by hydrogen fluoride and water glass solution of sodium hydroxide and precipitated silica gel 3 (NaOnSiO2) +Na2SiF6+3 (2n+1) H2O=6NaF+ (2n+1) Si (OH) 4 in order to accelerate the solidification, increase strength, using sodium fluosilicate (Na2SiF6) as the coagulant.

MgO is added in the particle matrix so that the high aluminum powder in the Al2O3 formation of spinel in the use of high temperature process (MgO, Al2O3) to improve the slag resistance.

Alumina magnesia castable has strong integrity, corrosion resistance, low cost, high slag resistance and other advantages, applicable to the ladle liner vibration casting method, the service life is more than doubled.

 

Pub Time : 2015-01-09 09:51:01 >> News list
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