Brief Analysis of Common Inorganic Binder Types for Refractories

First, water glass

 

Water glass is commonly known as "sodium alkaloid" and "sodium silicate", which is a highly complex dispersion system. Water glass can be hardened by heating, or a hardener can be added to make it chemically cured. An aqueous solution of sodium silicate is commonly known as water glass. In the system using water as a dispersant, sodium silicate is a colorless, slightly colored transparent or translucent viscous liquid. The solid sodium silicate is a colorless, slightly colored transparent or translucent glass block. The forms are divided into three types: liquid, solid, and water-quenched. Such substances are theoretically called "colloids". Water glass is commonly known as sodium silicate, and the main component is silicon. Ordinary sodium silicate is a light blue lumpy or granular solid. After dissolving at high temperature and pressure, it is a slightly colored transparent or translucent viscous liquid. The main varieties of silicate binders as binders for amorphous refractory materials are alkali metal silicates, commonly known as water glass.

 

Water glass is widely used in refractory materials, acid (siliceous, waxy), neutral (clay, high alumina), alkaline (magnesium, magnesium chromium, magnesium aluminum), both shape and shape can be used;

Second, silica sol

 

Silica sol is a binder for advanced refractories. For shaped refractories, the silica sol binder plays a role in increasing the strength of the embryo body, reducing the sintering temperature and widening the sintering range. For amorphous refractory materials, silica sol acts as a co-binder. Correctly mixing silica sol and chemical admixtures can significantly improve the refractory by significantly reducing the mixing of cement without affecting the setting, curing rate and drying strength. The effect of high temperature properties of materials. For example, configure ultra-low cement refractory castables.