China Manufacturer Polishing Grinding Powder Grit Abrasive Sand Brown Fused Aluminum Oxide, Find details about China Brown Fused Alumina, Brown Aluminium Oxide from Manufacturer Polishing Grinding Powder Grit Abrasive Sand Brown Fused Aluminum Oxide
What Is Difference Between Tilting Furnace Melted BFA & Fixing Furnace Melted BFA ?
Ball Milling & Barmac Process?
1. Tilting furnace process affects SiO2, SiO2 <1% by Tilting furnace, SiO2 <1.5% is by fixed furnace.
2. Barmac affects the density, the grain shape is rounder & the density is greater than ball milling
3. The Tilting furnace made BFA has high Al2O3 content
4. The corundum has good toughness & more suitable for abrasive products by dumping furnace process
The difference between F-grit & P-grit Abrasive grains:
F-grit is more suitable for bonded abrasive tools.
P-grit is more suitable for coated abrasive tools. It is with a closer tolerance size distribution, lower density, and better self-sharpening ability than non-P-grit abrasives, which means that they offer a more consistent surface finish.
Grain Usages and Types GB/T 2478-2008 | |||||
For vitrified wheels | For coated abrasives | For organic wheels | For refractory materials | ||
A | A-B | A-P | A-R | ||
Mohs Hardness | 9 | Density | ≥3.90g/cm3 | ||
Micro Hardness | HV1800-2200 | Electrical Resistivity | 1014-1016Ω•cm | ||
Grinding Ability | 0.10 | Linear expansion coefficient | 7.6 |
Type | Grit | Al2O3 | TiO2 | CaO | SiO2 | Fe2O3 |
A | F4-F80 | 95.00-97.50 | 1.70-3.40 | ≤0.42 | ≤1.00 | ≤0.30 |
F90-F150 | 94.50-97.00 | |||||
F180-F220 | 94.00-97.00 | 1.70-3.60 | ≤0.45 | ≤1.00 | ≤0.30 | |
F230-F800 | ≥93.50 | 1.70-3.80 | ≤0.45 | ≤1.20 | ≤0.30 | |
F1000-F1200 | ≥93.00 | ≤4.00 | ≤0.50 | ≤1.40 | ≤0.30 | |
A-B | F4-F80 | ≥94.00 | 1.50-3.80 | ≤0.45 | ≤1.20 | ≤0.30 |
F90-F220 | ≥93.00 | 1.50-4.00 | ≤0.50 | ≤1.40 | ≤0.30 | |
F230-F800 | ≥92.5 | ≤4.20 | ≤0.60 | ≤1.60 | ≤0.30 | |
F1000-F1200 | ≥92.00 | ≤4.20 | ≤0.60 | ≤1.80 | ≤0.30 | |
A-P | P12-P80 | 95.00-97.50 | 1.70-3.40 | ≤0.42 | ≤1.00 | ≤0.30 |
P100-P150 | 94.50-97.00 | |||||
P180-P220 | 94.00-97.00 | 1.70-3.60 | ≤0.45 | ≤1.00 | ≤0.30 | |
P240-P800 | ≥93.50 | 1.70-3.80 | ≤0.45 | ≤1.20 | ≤0.30 | |
P1000-P1200 | ≥93.00 | ≤4.00 | ≤0.50 | ≤1.40 | ≤0.30 | |
P1500-P2500 | ≥92.50 | ≤4.20 | ≤0.55 | ≤1.60 | ≤0.30 | |
A-R | 0-1mm | 94.00-97.50 | 1.50-3.80 | ≤0.45 | ≤1.40 | ≤0.30 |
1-3mm | 94.00-97.50 | 1.50-3.80 | ≤0.45 | ≤1.40 | ≤0.30 | |
3-5mm | 94.00-97.50 | 1.50-3.80 | ≤0.45 | ≤1.40 | ≤0.30 | |
5-8mm | 94.00-97.50 | 1.50-3.80 | ≤0.45 | ≤1.40 | ≤0.30 |
Guarnteed bulk density range of coarse grains(A / A-B, g/cm3) | |||
Grit | Grade | ||
Roll Crushing | Ball Mill | BMK | |
F12 | 1.84±0.05 | 1.92±0.05 | 2.00±0.05 |
F14 | 1.83±0.05 | 1.91±0.05 | 1.99±0.05 |
F16 | 1.81±0.05 | 1.90±0.05 | 1.98±0.05 |
F20 | 1.78±0.05 | 1.87±0.05 | 1.98±0.05 |
F22 | 1.76±0.05 | 1.85±0.05 | 1.96±0.05 |
F24 | 1.74±0.05 | 1.84±0.05 | 1.94±0.05 |
F30 | 1.72±0.05 | 1.81±0.05 | 1.90±0.05 |
F36 | 1.70±0.05 | 1.79±0.05 | 1.87±0.05 |
F40 | 1.68±0.05 | 1.76±0.05 | 1.85±0.05 |
F46 | 1.65±0.05 | 1.75±0.05 | 1.83±0.05 |
F54 | 1.63±0.05 | 1.73±0.05 | 1.81±0.05 |
F60 | 1.62±0.05 | 1.72±0.05 | 1.79±0.05 |
F70 | 1.60±0.05 | 1.69±0.05 | 1.78±0.05 |
F80 | 1.57±0.05 | 1.65±0.05 | 1.76±0.05 |
F90 | 1.54±0.05 | 1.64±0.05 | 1.74±0.05 |
F100 | 1.51±0.05 | 1.60±0.05 | 1.70±0.05 |
F120 | 1.49±0.05 | 1.59±0.05 | 1.68±0.05 |
F150 | 1.47±0.05 | 1.57±0.05 | 1.65±0.05 |
F180 | 1.45±0.05 | 1.56±0.05 | 1.61±0.05 |
F220 | 1.43±0.05 | 1.53±0.05 | 1.59±0.05 |
Guarnteed bulk density range of coarse grains(A-P, g/cm3) | |||
Grit | Grade | ||
Roll Crushing | Ball Mill | BMK | |
P12 | 1.80±0.05 | 1.88±0.05 | 1.96±0.05 |
P16 | 1.78±0.05 | 1.85±0.05 | 1.94±0.05 |
P20 | 1.76±0.05 | 1.83±0.05 | 1.93±0.05 |
P24 | 1.73±0.05 | 1.81±0.05 | 1.92±0.05 |
P30 | 1.70±0.05 | 1.79±0.05 | 1.90±0.05 |
P36 | 1.68±0.05 | 1.76±0.05 | 1.88±0.05 |
P40 | 1.65±0.05 | 1.73±0.05 | 1.86±0.05 |
P50 | 1.62±0.05 | 1.71±0.05 | 1.83±0.05 |
P60 | 1.59±0.05 | 1.67±0.05 | 1.81±0.05 |
P80 | 1.57±0.05 | 1.64±0.05 | 1.77±0.05 |
P100 | 1.55±0.05 | 1.62±0.05 | 1.73±0.05 |
P120 | 1.52±0.05 | 1.59±0.05 | 1.70±0.05 |
P150 | 1.49±0.05 | 1.55±0.05 | 1.66±0.05 |
P180 | 1.47±0.05 | 1.52±0.05 | 1.62±0.05 |
P220 | 1.45±0.05 | 1.50±0.05 | 1.58±0.05 |