Type of refractory casting material

Refractory castables are usually classified based on the size of the porosity, the selected binder or bonding method, the type of aggregate, and the construction method.
1. According to the porosity, it can be divided into dense refractory castable and insulation refractory castable;
2. According to the classification of bonding methods, refractory castables can be divided into four types: hydrated bonded refractory castables, chemically bonded (including polymerized) refractory castables, hydrated and polymerized refractory castables (typically low cement bonded refractory castables), and agglomerated bonded refractory castables.
3. According to the special functions of binders and certain materials, they can be classified into the following 7 categories:
(1) Clay bonded refractory castable;
(2) Ultra fine powder (such as silica fume) combined with refractory castable;
(3) Cement bonded refractory castable;
(4) Chemical bonded refractory castable;
(5) ρ- Al2O3 (hydrated Al2O3) combined with refractory castable;
(6) Low cement bonded refractory castable;
(7) Silica and aluminum sol (sol gel) bonded refractory castables.
4. According to the combination of raw materials, refractory castables can be divided into oxide based refractory castables, non oxide based refractory castables, and composite refractory castables. Oxide based refractory castables can be further divided into non alkaline refractory castables and alkaline refractory castables.
5. According to the construction method, refractory castables can be divided into two categories: vibration construction refractory castables and self flowing refractory castables.
6. According to whether the refractory castables contain cement or CaO content, they can be simply divided into four categories: ordinary refractory castables, low cement refractory castables, ultra-low cement refractory castables, and cementless refractory castables.