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One of the important working properties of high alumina refractory bricks is the structural strength at high temperature, which is usually evaluated by the load softening deformation temperature. Its high temperature creep property is also measured to reflect its high temperature structural strength. The test results show that the load softening temperature increases with the increase of AL203 content.

For high-alumina refractory bricks with an AL203 content of less than 70%, the load softening temperature depends on the ratio between the mullite crystal phase and the liquid phase, and increases with the increase in the amount of mullite. The amount and nature of the liquid phase have a significant effect on the softening temperature under load. Therefore, reducing the impurity content in raw materials is beneficial to improving the softening temperature under load and high temperature creep.

The forming production methods of high alumina refractory bricks and clay bricks are basically the same, but some process parameters are different. There are also processes such as crushing → kneading → molding → drying → firing → inspection → packaging. The compressive stress bears better at low temperature but slightly decreases at high temperature, so the stacking in the kiln is less than 1 meter. The production process of high-alumina refractory bricks and multi-clinker clay bricks is similar. The difference is that the proportion of clinker in the ingredients is higher, up to 90%~9%. The clinker needs to be classified, sorted and screened to remove iron before crushing. Such as I, II and other high-alumina refractory bricks are generally fired at 1500~1600°C when fired in a tunnel kiln.

Production practice has proved that high alumina clinker is strictly selected and graded before crushing, and graded and stored. Using bauxite clinker and combined clay to finely grind together can improve the quality of high alumina refractory bricks.

1. Low Density

Low bulk density and low heat capacity greatly shorten the heating and cooling time of the kiln; low heat conduction effectively saves the cost of fuel in the furnace.

2. Thermal Shock Resistance

It has good thermal shock resistance; anti-airflow erosion; good mechanical strength; built-in metal anchors, good safety performance; easy installation, etc.

3. Application Scope

It is used in heating furnaces, continuous annealing furnaces, kiln cars, ladle covers, etc. in iron and steel enterprises, as well as annealing furnaces, normalizing furnaces, tempering furnaces, soaking furnaces, etc. for heat treatment.

4. Support Customization

Clay refractory bricks are generally divided into standard type, general type, special type and special type, and can also be customized according to user needs.

5. Scope of Application:

Iron and steel, metallurgical industry

Coking kiln industry

cement kiln industry

glass industry

petrochemical industry

Carbon industry