Corundum: corundum density related presentations

Corundum density:
Density is divided into two, one corundum bulk density, the second is the true density corundum. 
Bulk density:
1.53 ~ 1.99g/cm3, the bulk density of the abrasive and the abrasive grain size, grain size, species, particle shape and other factors are, in general, coarse abrasive bulk density than the fine-grained abrasive, mix size is greater than the bulk density of the abrasive single particle density.
Particle density:
3.95 ~ 4.0g/cm3, in recent years, special casting corundum true density has reached 4.1g/cm3, the true density of the abrasive is the unit volume (excluding the volume of open porosity) contained within the abrasive quality, primary particle size of as follows: 45% to 55%, corundum can rest assure that more than 50%, the basic effect of particle size is an important indicator to ensure the ground, should be properly controlled in the production, but the production speed may slow down.