Electrocorundum

Depending on the content of aluminium oxide (Al2O3) and the method obtaining corundum can be:

Brown Corundum belongs to the group of electro-corundum. It is produced bycontrolled melting of calcined bauzite in an electric arc furnace. Brown fused alumina is iron-free and extremly tough.

Noble Corundum - because its angular shape and hardness, noble corundum abrasive has a powerfull effect. presents a highpurity is extremely hard, brittle and has a very high melting point. An abrasive material for the most demanding applications.

	Brown Corundum	Noble Corundum
Specific mass	3,96 kg/l	3.92 kg/l
Volumetric mass	1.75 kg/l
Hardness according to Mohs	9 Mohn
Hardness according to Knoop	1800 N/mm²	2100 N/mm²
Form	Angular
Chemical composition	Al2O3 - 95,20% TiO2 - 2.90% Fe2O3 - 0,20% SiO2 - 1,30 % CaO + MgO - 0,40%	Al2O3 - 99,81% CaO - 0,05% Fe2O3 - 0,035% Na2O - 0,11% SiO2 - 0,02% TiO2 - 0,04%
Packaging / delivery	Paper bags 25 kg/bag Minimum quantity deliverable – 25 kg
Granulations available	F220 53-75 μm F120 90-125 μm F100 106-150 μm F90 150-200 μm F80 150-212 μm F70 180-250 μm F60 212-300 μm F46 300-425 μm F40 355-500 μm F36 425-600 μm F30 500-710 μm F24 600-850 μm F22 600- 1000 μm F20 850-1180 μm F16 1000-1400 μm

Depending on the content of aluminium oxide (Al2O3) and the methodobtaining corundum can be:

Brown Corundum is included in the electro-corundum group. It is produced bycontrolled melting of calcined bauzite in an electric arc furnace. The properties of the brown fused alumina are: iron-free and extremly tough.

Noble Corundum - due to its angular shape and hardness, noble corundum abrasive has a powerfull effect, presents a highpurity is extremely hard, brittle and has a very high melting point. It is ideal abrasive material for the most demanding applications.

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