Alumina Zirconia

Alumina Zirconia

Alumina Zirconia is an abrasive material produced by electro fusing zirconium and alumina raw materials in an electric arc furnace, and then by quenching, crushing and sieving the fused mineral into selected grain sizes. Zirconium Alumina has small crystal size and a unique microstructure, which give it excellent toughness, hardness, cutting capacity, and durability. Depending on the application, Zirconium Alumina is often far superior to brown fused alumina, silicon carbide and other traditional abrasive materials.

Zirconium alumina abrasive is made of bauxite (or alumina powder), zircon sand, carbon material and iron filings. 

Zirconium alumina smelting is divided into three methods according to raw materials.:

The first uses bauxite and zircon sand plus reducing agents to remove impurities.

The second uses alumina powder and industrial pure zirconia,

The third uses alumina powder and zircon sand concentrate.


According to the content of ZrO2, Zirconium alumina is divided into low Zirconium alumina (ZrO2 10%~15%), medium Zirconium alumina (ZrO2 25%) and high Zirconium alumina (ZrO2 40%). Low chromium balls contain 1%-3% chromium, hardness HRC45; various alloy balls contain 4%-6% chromium, hardness HRC47; medium chromium alloy balls contain 7%-10% chromium, hardness HRC 48; high chromium alloy balls with chromium content 10%-14%, hardness HRC58; special high chromium balls with chromium content above 14%, hardness HRC58.


Zirconium alumina has good resistance to melt erosion and can be used as a high-grade abrasive to make high-performance heavy-duty grinding wheels. It has good grinding effect on heat-resistant steel and various alloy materials; Zirconium alumina is also a high-grade refractory raw material. It is an ideal material for making high-performance sliding nozzles and submerged nozzles, and can also be used to make Zirconium alumina bricks for glass furnaces.

Standard sizes:
ZA 25%:F4 to F220; 20/40 Mesh, 30/60 Mesh
ZA 40%:F8 to F220; P20 to P220