Adding white corundum to refractory castable can significantly improve the following properties:

I. Improving high temperature resistance

The main component of white corundum is alumina (Al₂O₃), and its melting point is above 2050°C, which can significantly improve the refractoriness of refractory castable. This makes the castable stable for a long time in high temperature environment and difficult to melt or deform.

II. Enhance wear resistance

White corundum has extremely high hardness (Mohs hardness 9.0) and good toughness, which can effectively resist wear and abrasion in high temperature environment. After adding white corundum, the wear resistance of refractory castable is obviously improved, especially suitable for parts that need to bear a lot of wear.

III. Improving corrosion resistance

White corundum can still maintain stable chemical properties in corrosive environments such as strong acid and alkali, and will not be corroded by most chemicals. After adding white corundum, the corrosion resistance of refractory castable is significantly enhanced and it can run stably in corrosive environment for a long time.

IV. Improving thermal shock resistance

White corundum has low thermal expansion coefficient and good thermal shock resistance. Adding white corundum to refractory castable can enhance the material's ability to resist sudden temperature change and reduce cracking and peeling caused by thermal stress.

V. Improving the compactness of materials

The addition of white corundum can improve the compactness of refractory castable and reduce the porosity. This not only improves the strength of the material, but also enhances its corrosion resistance.

VI. Enhance construction performance

White corundum fine powder can improve the fluidity and plasticity of refractory castable, making it easier to pour and fill in the construction process. This is helpful to improve the construction efficiency, especially suitable for complex shapes.

VII. Reduce the rate of linear change

The linear change rate of white corundum castable at high temperature is low, which can reduce the deformation and cracks of the material at high temperature. This is helpful to maintain the structural integrity of castable and prolong its service life.

VIII. Improving high temperature strength

The crystal structure of white corundum is compact and the bulk density is high. After adding it, the internal structure of refractory castable can be more compact. This not only improves the compressive strength of castable, but also enables it to bear greater load at high temperature.

To sum up, the addition of white corundum can comprehensively improve the properties of refractory castable and make it perform better in harsh environments such as high temperature, wear and corrosion.