Fused AluminaDWR
Description:
DWR is produced by fusing calcined alumina in an electric arc furnace under carefully controlled conditions.
The fused material which is called Ingot is white in color.
It has high density and large crystals of alpha alumina.
The Ingot is cooled in aluminum pot and then crushed, ground, and precisely screened in our new sizing plant.
DWR is used to produce high quality refractory shapes, monolithics, investment casting moulds and ceramic shells.
Chemical Composition (wt. %):
| Composition | Coarse Size | Medium Size | Ground Size | Special Size | ||||
|---|---|---|---|---|---|---|---|---|
| Spec. | Typical | Spec. | Typical | Spec. | Typical | Spec. | Typical | |
| Al2O3 | 99.0 min | 99.74 | 99.0 min | 99.68 | 99.0 min | 99.63 | 99.0 min | 99.75 |
| Fe2O3 | 0.10 max | 0.02 | 0.10 max | 0.04 | 0.10 max | 0.05 | 0.10 max | 0.04 |
| SiO2 | 0.10 max | 0.01 | 0.10 max | 0.02 | 0.10 max | 0.03 | 0.05 max | 0.03 |
| Na2O | 0.40 max | 0.24 | 0.40 max | 0.26 | 0.40 max | 0.29 | 0.30 max | 0.18 |
| Size |
6-3 ㎜, 5-3 ㎜, 3-1 ㎜ |
1-0.5 ㎜, 0.5-0.212 ㎜, 1-0 ㎜, 0.5-0 ㎜, 0.3-0 ㎜ |
48 mesh, 220 mesh, 270 mesh, 325 mesh |
220 meshL, 1500 meshL |
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Physical Properties:
| Property | Unit | Specification | Typical | |
|---|---|---|---|---|
|
Physical Properties of Particle (6-10 mesh) |
Water Absorption | % | - | 2.5 |
| Apparent Bulk Density | g/㎤ | - | 3.84 | |
| Bulk Density | g/㎤ | 3.60 min | 3.65 | |
| Apparent Porosity | % | 7.0 max | 5.23 | |
| Specific Gravity | g/㎤ | - | 3.95 | |
| Mineral Property | - | Corundum | Corundum | |
Particle Size Distribution:
| Item | Unit | Specification | Typical | ||
|---|---|---|---|---|---|
| 8-5 ㎜ | ㎜ | +8.00 | -4.00 | +8.00 | -4.00 |
| % | 5 max | 5 max | 1.28 | 3.01 | |
| 6-3 ㎜ | ㎜ | +5.60 | -2.80 | +5.60 | -2.80 |
| % | 10-30 | 5 max | 22.72 | 2.74 | |
| 3-1 ㎜ | ㎜ | +3.35 | -3.35 / +1.00 | +3.35 | -3.35 / +1.00 |
| % | 5 max | 85 min | 0.19 | 95.60 | |
| 1-0 ㎜ | ㎜ | +1.00 | -0.212 | +1.00 | -0.212 |
| % | 5 max | 35 max | 0.76 | 18.56 | |
| 1-0.5 ㎜ | ㎜ | +1.00 | -0.50 | +1.00 | -0.50 |
| % | 5 max | 10 max | 0.65 | 5.80 | |
| 0.3-0 ㎜ | ㎜ | +0.30 | -0.075 | +0.30 | -0.075 |
| % | 3 max | 15-30 | 0.20 | 21.76 | |
| 220 mesh | ㎜ | +0.30 | -0.075 | +0.30 | -0.075 |
| % | 3 max | 65-85 | 0.03 | 77.80 | |
| 270 mesh | ㎜ | +0.15 | -0.053 | +0.15 | -0.053 |
| % | 5 max | 65 min | 1.82 | 74.40 | |
| 325 mesh | ㎜ | +0.045 | -0.045 | +0.045 | -0.045 |
| % | 5 max | 95 min | 1.36 | 98.54 | |
| 1500 mesh | ㎜ | -9.6 ㎛ | mv | -9.6 ㎛ | mv |
| % | 45.0 min | 6-11 ㎛ | 77.15 | 8.2 ㎛ | |