Advantages of calcined alumina balls used in refractories

  Calcined alumina ball is made from industrial alumina powder by calcination in high temperature tunnel kiln
After several hours' processing and grinding by ball mill, iron is removed by magnetic separation and sieved into various particle sizes
Packaging and warehousing to complete production
With high density, high hardness and uniform particle size, it is suitable for manufacturing ceramics, abrasive tools, grinding, polishing, industrial casting, metallurgical industries, etc
it is very suitable for manufacturing high-grade castables and refractories
The following describes the advantages of calcined alumina balls used in refractories: calcined alumina micropowder refers to calcined alumina micropowder, which is usually 325 mesh, 1000 mesh, 2000 mesh and 3000 mesh
It is called ultrafine micropowder
Taking 325 mesh as an example, this type of calcined alumina micropowder contains a mixture of more than 325 mesh calcined alumina micropowders, and generally the screening residue is less than 1%
It is not a single calcined alumina 325 mesh fine powder
Adding appropriate calcined alumina to the refractory can effectively improve the fire resistance of the refractory, so calcined alumina is added to the refractory
After the molecular sieve was replaced by calcined alumina powder, the high temperature resistance of the refractories did not decrease, but improved, and the linear change rate of fire resistance also increased
The reason is that adding an appropriate amount of calcined aluminum oxide powder can appropriately improve the density of castable
Calcined aluminum oxide at high temperature can also form Mullite with micro silica powder
The less impurities in calcined aluminum oxide, the content of impurities will directly affect the performance of calcined aluminum oxide
The high temperature strength of castable is improved
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