Hydration bonding is generated by hydration reaction of binder and water at room temperature to produce hydration products. Reburned magnesite
Chemical bonding is achieved by chemical reaction between binder and hardener, or between binder and refractory at room temperature, or chemical reaction during heating to produce compound with bonding effect.
Polymerization bonding is achieved by adding catalyst or cross-linking agent to make the bonding agent polycondensate to form a network structure and produce bonding strength.
Ceramic bonding refers to low-temperature sintering bonding, that is, adding additives or metal powders that can reduce the sintering temperature in bulk refractories to greatly reduce the temperature of the liquid phase and promote the solid-liquid reaction at low temperature to produce low-temperature sintering bonding.
Adhesive bonding is produced by one of the following physical actions.
Physical adsorption:
The combination depends on the van der Waals force of intermolecular interaction;
Diffusion:
Under the action of the thermal movement of the material molecules, the adhesive and the molecules of the bonded substance will diffuse each other to form a diffusion layer, thus forming a firm bond;
Electrostatic effect:
There is a double electric layer at the interface between the binder and the binder, which is bound by the electrostatic attraction of the double electric layer.
Magnesite products are mainly sintered from magnesite in high temperature shaft kiln. The content of MgO is high, usually between 90-93%. It is the raw material for producing ordinary magnesia bricks and amorphous refractories.
