Do You Know The Relevant Knowledge Of Pink Fused Alumina Refractories?

The chromium oxide in the pink fused alumina refractory material is less than 40‰, and the remaining component is alumina material. At the same time, the pink fused alumina refractory material will contain a small amount of impurities, which has higher refractoriness and greater hardness, and has excellent corrosion resistance. Sex, good thermal shock resistance and high wear resistance. From the application point of view, pink fused alumina refractories are widely used, for example, ladle refining furnace, coal water slurry pressurized gasification furnace lining, carbon black reaction furnace lining, etc., are indispensable materials in high temperature industries.

Cr₂O₃ and Al₂O₃ have the same crystal structure, and their ionic radii differ by 13.7%. Therefore, under high temperature conditions, Cr₂O₃ and Al₂O₃ can form an infinite solid solution. When the content of Cr₂O₃ is increased, the liquidus temperature will rise. If an appropriate amount of Cr₂O₃ is added to Al₂O₃, it will be found that the mechanical properties and high-temperature performance of corundum-based refractories are changed.

Cr₂O₃ can form compounds with higher melting points or eutectics with higher melting temperatures with many common oxides.
In addition, Cr₂O₃ can also increase the viscosity of the slag, the viscosity increases, the fluidity of the slag will decrease, and the erosion of the refractory material by the slag will also be reduced. When we add an appropriate amount of Cr₂O₃ to the refractory material, it can reduce the spalling of the furnace lining material structure caused by erosion.