Amorphous Refractory The Corresponding Change
Amorphous Refractory In the refractory material used for the modulus of 2 to 3 of the amorphous. Its density and melting point is not fixed, depending on the modulus of the corresponding changes in the modulus of 4 within the range of its density increases with the SiO2 content increased. Amorphous Refractory In the unshaped refractory material in the use of viscous water glass, the density of 1.30 ~ 1.40g / cm3.
Water glass heat-resistant concrete is made of water glass as binder, and the addition of sodium fluorosilicate as a coagulant. Rely on water glass hydrolysis of silica gel, Amorphous Refractory the aggregate, admixture particles together. In a variety of heat-resistant concrete, water glass heat-resistant concrete strength is higher, but its fire resistance and load softening temperature is low. This heat-resistant concrete for 1000 ℃ below the requirements of a higher strength, good wear resistance, acid corrosion can be used, Amorphous Refractory but can not be used for water and water vapor often the site.
The modulus, density and amount of water glass binder are important factors influencing the water glass refractory castable. From the hardening mechanism, it can be seen that the strength of the refractory aggregate and the powder is cemented by the adhesion, condensation and agglomeration of the silicic acid gel. Amorphous Refractory Therefore, when there is sufficient sodium fluorosilicate, the modulus of the water glass solution increases or the density increases, and a large amount of silicic acid gel can be precipitated, thereby improving the strength. Amorphous Refractory The amount of water glass increased, the formation of stomatal pores increased performance.
Water glass. Water glass is a mixture of many sodium silicate. In the refractory material used for the modulus of 2 to 3 of the amorphous. Its density and melting point is not fixed, Amorphous Refractory depending on the modulus of the corresponding changes in the modulus of 4 within the range of its density increases with the SiO2 content increased. In the amorphous refractory material used in viscous water glass, Amorphous Refractory the density of 1.30 ~ 1.40g / cm3.
Water glass condensation and hardening: water glass has a very good adhesion. The formation of such adhesion is different depending on the coagulation and hardening conditions, Amorphous Refractory but is related to the formation of agglomerated structure.
At room temperature, condensation and hardening are very slow. In the production of water glass to promote the hardening, often add a certain amount of hardening agent.Amorphous Refractory Usually with acid or metal ions of the add-in, so that the water glass alkali solution to neutralize the role of accelerated hydrolysis of sodium silicate, Amorphous Refractory so that silicone gel precipitation and cohesion.
Water glass hardened body in the heating changes, water glass hardened body heated to 50 ℃ or more that began to dehydrate, more than 100 ℃ when the majority of water in the silicone gel can be ruled out to 300 ℃ basically drained.
Application of water glass: water glass in addition to the same can not easily with the hydration of dolomite materials, with any other barren material can be prepared into a variety of unshaped refractories. However, Amorphous Refractory the combination of water glass unshaped refractories, Amorphous Refractory not flooding and damp.