How to distinguish brown fused alumina powder and garnet flour?
Brown fused alumina is also called brown corundum and brown aluminum oxide.
It is confirmed that there are some differences between brown fused alumina powder and garnet flour,now explain and list them:
First: raw material
Brown fused alumina is made from bauxite,but garnet is natural from garnet mine.
Secondly: appearance
Both brown fused alumina powder and garnet flour look gray powder,but brown fused alumina powder looks more brownish,but garnet powder redish.
Third:Classification media
Brown fused alumina powder is classificated by water,but garnet flour is by airflow.
Fourth:Main chemical compostion
Brown fused alumina :Al2O3,but garnet flour is SiO2.
Fifth:Hardness
Brown fused alumina has higher mohs hardness,which is about 9.0,but garnet is about 7.5-8.0.so brown fused alumina powder is used for blasting,grinding and polishing harder parts,but garnet flour is a little soft comparatively,then it can be chosen to be used for soft workpieces.
Sixth:Cost
Brown fused alumina is artificial abrasives,its process is very complex,so it cost higher,but garnet powder is from natural garnet,cost lower,if the user take cost into consideration too much,garnet flour is a better choice.
Seventh:Environment protection
When blasting/grinding/polishing,brown fused alumina powder will produce more dust.
In summary,both brown fused alumina powder and garnet flour has their own properties and advantage,and are very important in their own stage.