Additives and formulations for refractory materials
(Na4P2O7), sodium tripolyphosphate (Na5P3O10), sodium pyrophosphate (Na4P2O7), sodium pyrophosphate (Na4P2O7), sodium pyrophosphate (Na2P4O11), sodium silicate (Na2O · nSiO2 · mH2O), etc .; organic lignin-based water-reducing agent (sodium lignosulfonate, wood Calcium sulfonate); naphthalene-based water reducing agent (condensate of naphthalene or naphthalene homologue sulfonate and formaldehyde): water-soluble resin-based water reducing agent (sulfonated melamine formaldehyde resin, abbreviated as melamine) Agent).
The water reducing agent refers to a substance capable of remarkably reducing the amount of water to be mixed, and also called a precipitation agent, while maintaining the flow rate of the refractory castable substantially constant. The water-reducing agent itself does not react chemically with the material composition to produce new compounds, but acts as a surface physicochemical.
