Brief analysis of the characteristics of hot-selling corundum refractory bricks

The characteristics of corundum refractory bricks used in refractory materials mainly have these characteristics:

 

1. High strength and wear resistance.

 

2. Resistance to erosion and penetration of acid slag: the main crystal phase of various corundum is a-Al2O3, which has good resistance to erosion and penetration of acid slag. The slag generated during ironmaking is generally acidic slag, with a higher SiO2 content and a lower CaO content. The iron-making industry generally uses Al2O3-based refractory materials as the lining, such as high-alumina bricks in the blast furnace body, Al2O3-SiC-C quality refractory materials (casting materials and ramming materials), and sludge (Al2O3-SiO2-SiC -C quality), Al2O3-SiC-C quality refractory materials (castables and refractory bricks) for hot metal ladle and torpedo tanks, etc.

3. Diversity of materials and properties: The main crystal phase of corundum is a-Al2O3, which can be compounded with many oxides and non-oxides, which improves some of its own properties, such as thermal shock resistance and slag resistance (acidic or alkaline) ) Aggressiveness, etc. Compounded with SiO2 to form corundum mullite refractory, and MgO to form corundum-spinel refractory, and zircon sand (ZrO2 and SiO2) to form Al2O3-SiO2-ZrO2 refractory, and silicon carbide and Carbon composite forms Al2O3-SiC-C quality refractories, etc .;

 

4. Diversity of bonding methods. Corundum and various bonding agents have good compatibility. A variety of bonding methods can be used, such as high temperature sintering, low temperature bonding, etc., which can give the material different characteristics.