Aluminum oxide (Al2O3) powder for green sand mold coatings
Product Introduction of Aluminum oxide (Al2O3) powder for green sand mold coatings
Aluminum oxide (Al2O3) powder for green sand mold coatings is a product of fused corundum produced by melting high-purity alumina powder at a high temperature in an electric arc furnace (melting temperature is up to 2050 degrees). Then after solidifying, agglomerating, and cooling, it forms to high purity fused corundum blocks. Due to the high-temperature melting production process, alumina is mainly transformed into the crystal form of α-Al2O3. Fused corundum has good toughness, high thermal resistance, and high chemical stability.
In addition, the fused corundum produced by our company has low sodium content and good thermal performance. It can be used to produce corundum casting paint, and foundry coating, and can also be directly used as shell-molding substrate material and shell-molding spay sand for precision casting.
Product features of Aluminum oxide (Al2O3) powder for green sand mold coatings
High refractoriness. It can resistant to high temperatures up to 1900°C.
High strength with Mohs hardness of 9.0.
High density.
Resistant to most acid and alkali.
Chemical stability, so it won’t get eroded by molten steel.
Available Sizes：
| Fused corundum fine powder | 100#-0,200#-0,240#-0,270#-0,320#-0 |
| Fused corundum grit | F60,F80,F90,F100,F120,F150,F180,F220(200um，180um，150um，120um，100um，80um，70um，60um) |
| Fused corundum micropowder | JIS 240#,JIS280#,JIS320#,JIS360#,JIS400#,JIS600#,JIS700#,JIS800#,JIS1000#,JIS1200#,JIS1500#,JIS2000#,JIS3000#,JIS 4000#,JIS6000#,JIS8000#(63um，50um，40um，28um，20um，10um，7um，5um，3.5um，2.5um，1.5um) |
Aluminum oxide (Al2O3) powder for green sand mold coatings Chemical composition（Typical value）:
| Fused corundum fine powder (200-0#) | AL2O3 | 99.55% |
| SiO2 | 0.04% | |
| NA2O | 0.22% | |
| Fe2O3 | 0.04% | |
| CaO | 0.03% | |
| Fused corundum grit (185 micron F80) | AL2O3 | 99.10% |
| SiO2 | 0.16% | |
| NA2O | 0.32% | |
| Fe2O3 | 0.08% | |
| CaO | 0.04% | |
| Fused corundum grit（100 micron F120 ） | AL2O3 | 99.10% |
| SiO2 | 0.16% | |
| NA2O | 0.32% | |
| Fe2O3 | 0.08% | |
| CaO | 0.04% | |
| Fused corundum micropowder（50 miron JIS320 mesh） | Al2O3 | 99.67% |
| SiO2 | 0.02 | |
| NA2O | 0.15 | |
| Fe2O3 | 0.01 | |
| CaO | 0.03 | |
| Fused corundum micropowder（20 micron JIS800 mesh） | Al2O3 | 99.27% |
| SiO2 | 0.14 | |
| NA2O | 0.30 | |
| Fe2O3 | 0.06 | |
| CaO | 0.05 |
Aluminum oxide (Al2O3) powder for green sand mold coatings Physical properties：
| Typical physical properties | |
| Hardness: | Mohs:9.0 |
| Maximum service temperature: | 1900 Degree |
| Melting Point: | 2250 Degree |
| Specific Gravity: | 3.95g/cm3 |
| Volume density | 3.6g/cm3 |
| Bulk density(LPD): | 1.55-1.95 g/cm3 |
| Color: | White |
| Particle shape: | Angular |
Applications of Aluminum oxide (Al2O3) powder for green sand mold coatings
The raw material for the production of foundry coatings: High cleanness, fewer impurities, and good dispersion.
Precision casting shell surface sand, shell mold casting shell molding, lost foam casting, molding sand casting, etc.: Large range of particle sizes, can be adjusted according to different casting processes. Low-sodium fused corundum can replace zircon sand, saving casting costs.
Production details of Aluminum oxide (Al2O3) powder for green sand mold coatings
Product Qualification of white fused alumina
Packing of white fused alumina
25KGS/PVC Bag
1Metric Ton/Jumbo Bag
25KGS/PVC Bag,40Bags/Jumbo Bag
1 Metric Ton/Jumbo Bag/Pallet
In the meantime, other customized packages are available.
FAQ
Q: Are you a manufacturer or trading company?
A: We are a manufacturer of white fused alumina. HAIXU Abrasives has white fused alumina manufacturing history of 22 years. So we could provide professional service to customers. We produce White fused alumina section sand, White fused alumina grains, White fused alumina powder, etc.
Q: What about the difference between White fused alumina 325#-0 powder and 320 mesh micro powder?
A: The White fused alumina 325#-0 powder is get from the milling and mesh sieving process. It’s more suitable for filler of refractory products. However, the White fused alumina 320 mesh is get from a water suspension treating process. It’s more suitable for polishing and lapping.
Q: Are the White fused alumina grains you get is produced from a Tilting furnace or a Fixing furnace?
A: Our white fused alumina grains F8-F220 are produced from fixing furnaces. Fixing furnace white fused alumina is of higher toughness and more durable.
Q: What is the content of Na2O of your white fused alumina grains?
A: We have normal Sodium WFA grain and low Sodium WFA grain. Normal WFA grain Na2O content is max. 3%. It is even lower than most competitors. Low sodium WFA grain Na2O content is max.0.1%.
Q: Do you have a MOQ of WFA powder?
A: Basically, there is no limit to MOQ. Even 25kgs(1 bag)is ok for us. But the logistic cost will be higher than normal.
Q: How do you make quality control on White fused alumina before delivery?
A: We will check the quality of white fused alumina including chemical content, particle size distribution, and milling toughness of white fused alumina. In the meantime, check the bulk density of white fused alumina, the whiteness of white fused alumina, etc.
Q: What is the lead time of FCL White fused alumina?
A: Generally, 7-10 days after receiving the deposit.
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