Similarity and difference of low sodium white corundum and normal white corundum
First,we list the similarities of low sodium white corundum and normal white corundum
1.Raw material:both are industrial aluminum oxide
2.Appearance is white powder
3.Production processing is almost the same:smelting,crushing,grinding,acid-washed,overflow classification,testing,packing etc
4,Production standard is the same,both according FEPA or JIS.
Secondly,we mainly talk about the differences of the low-sodium white corundum and nornal white corundum
1,Raw material:Normal white corundum use the common industrial aluminum oxide,but low sodium white corundum is strict,must be low sodilum aluminum oxide.
2.Color,although they both white,but if compare carefully,we can see that low sodium white corundum is a little dark,not white as as normal white corundum.
3.Physical properties:Low sodium white corundum,smelted longer time,then it has higher purity,higher hardness,bulk density and volume density.
4.Chemical compostion:the details is as follows:
| Al2O3 | Na2O | SiO2 | Fe2O3 | |
| Low sodium white corundum | ≥99.7% | 0.01-0.09% | ≤0.1% | ≤0.1% |
| Normal white corundum | ≥99.3% | 0.20-0.40% | ≤0.2% | ≤0.2% |
5.Applications:Except the applications of normal white corundum,low sodium white corundum also can used as high grade refractory,high grade ceramic grinding wheel,anti-sticking sand in electric field etc.The grinding efficicency will be increased if matchs with SG abrasives.
6.The cost: The cost of low sodium white corundum is higher much then normal white corundum.