Black spherical Fused Ceramsite Sand Foundry Material 150# 20-30
Mesh
Ceramsite, also called as Fused ceramic sand, or NFS CERAMSITE-Nice
Foundry Sand, is a kind of spherical shape ceramic particles
featured by high refractoriness, low thermal expansion melted from
the fused bauxite.
It provides a simple and efficient way in the foundry industry to
improve the quality of the castings, reducing the production cost
and avoiding environmental pollution, so it is much better than
silica sand. And it is also good substitution to Chromite sand and
Zircon sand because of its lower price. At the present, Ceramsite
is acknowledged in the worldwide as the ideal sand for the
foundries and has a wide feasibility of applications for the future
development.
Chemical Index
| Index | Al2O3 | SiO2 | Fe2O3 | TiO2 | K2O+Na2O | CaO+MgO | L.O.I |
| Content | 75% Min. | 18% Max. | 3% Max. | 3.5% Max. | 1% Max. | 1% Max. | 0.3% Max. |
Technical Index
| Index | Refractories | Bulk Density | True density | Angle coefficient |
| Content | 1800 ℃ | 1.65-1.95g/cm3 | 3.3g/cm3 | 1.1 Max. |
| Index | PH Value | Moisture | Mud Content | Thermal expansion rate |
| Content | 7-8 | 0.1% Max. | 0.1% Max. | 0.13% |
μm Mesh | 1700 | 850 | 600 | 425 | 300 | 212 | 150 | 106 | 75 | 53 | Pan | AFS | # |
| 10 | 20 | 30 | 40 | 50 | 70 | 100 | 140 | 200 | 270 |
| 20/40 | ≤ 2 | 15-40 | 30-55 | 15-35 | ≤ 3 | | | | | | | 15-25 | 200# |
| 30/50 | | ≤ 10 | 25-45 | 35-55 | 5-15 | ≤ 5 | ≤ 2 | | | | | 25-29 | 300# |
| 40/70 | | | ≤ 10 | 25-45 | 20-40 | 15-25 | ≤ 7 | ≤ 5 | | | | 35-39 | 400# |
| 40/100 | | | ≤ 3 | 10-25 | 25-40 | 25-45 | 10-20 | ≤ 10 | ≤ 5 | | | 45-55 | 500# |
| 50/100 | | | | ≤ 10 | 10-30 | 30-50 | 15-35 | ≤ 15 | ≤ 5 | ≤ 2 | ≤ 1 | 55-65 | 600# |
| 50/140 | | | | ≤ 8 | 10-25 | 20-40 | 20-40 | 5-20 | ≤7 | ≤ 2 | ≤ 1 | 60-70 | 650# |
| 70/140 | | | | | ≤ 10 | 10-25 | 25-45 | 15-35 | ≤15 | ≤ 5 | ≤ 2 | 75-85 | 750# |
| 100/200 | | | | | | ≤ 3 | 10-30 | 35-55 | 15-35 | ≤10 | ≤ 5 | 95-115 | 1000# |
| 140/270 | | | | | | | ≤ 5 | 5-25 | 40-60 | 25-40 | ≤15 | 155-175 | 1500# |
Features:
1. Low thermal expansion, can reduce the casting flaw, and improve dimensional accuracy.
2. Neutral material, can work with acids and alkalis.
3. Cost-effective compared with the chromite sand and zircon sand, its
price is only 30-50% of zircon sand and chromite sand.
4. Spherical shape and small surface, the resin can be reduced 30-50%
5. Good refractoriness with mulite in it, easy to collapsing.
Application:
Ceramsite sand is widely used in loast foam castings.
The advantage of ceramsite in lost foam casting is that it can be
recycled and reused as its high refractoriness of 1800 degrees and
of good stability,.
In the lost foam casting process, the filling sand actually does
not use the adhesive, only need to vacuum in the sand box to ensure
the strength of the ceramsite sand. Therefore, the cost of filling
sand is quite low, and can be used repeatedly, greatly reduces the
cost of using foundry sand.
Full applications of Ceramsite sand as below:
Lost Foam casting
Hot core box casting
Cold box process casting
Self-setting sand
Investment casting
Large steel casting
Precision casting
Drainage sand
Refractory Coating
3D printing
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