What is the black powder in the lost foam coating?chromite powder 325#mesh?
The black powder in the lost foam coating is chromite powder. The size maybe 325#.
Chromite powder 325# can be used in lost foam coatings. Chromite powder is often used in casting coatings.
The reasons are as follows:
Precise fineness: Chromite powder 325# has a pass rate of more than 90-100%, uniform particles, and can be better dispersed in the coating to improve the uniformity and stability of the coating.
Low moisture content: Dry without caking, ensuring that the coating will not be affected by humidity problems during use.
High refractory temperature: The melting point of chromite sand is 2180 degrees, and the sintering temperature is greater than 1850 degrees. It can remain stable at high temperatures to prevent the coating from failing at high temperatures.
Excellent thermal conductivity: Chromite sand has stronger thermal conductivity, can accelerate cooling and heat conduction, and improve casting efficiency.
Good chemical stability: It has good resistance to alkaline slag when in contact with molten metal, does not react chemically with iron oxide, etc., can prevent the penetration of molten metal, and avoids the occurrence of sticky sand defects. Therefore, chromite powder 325# chromite powder is an ideal choice in lost foam coatings, which can improve the performance of the coating and the casting effect.
Avalible size for our chrome powder:
200MESH, 325MESH, 400MESH, 500MESH, 600MESH, 800MESH, 1000MESH, 1200MESH, 1500MESH, 2000MESH, 2500MESH
Chemcial index:
| Cr2O3 | SiO2 | FeO | CaO | MgO | Al2O3 | P | S | Cr/Fe |
| ≥46.0% | ≤1.0% | ≤26.5% | ≤0.30% | ≤10.0% | ≤15.5% | ≤0.003% | ≤0.003% | 1.55:1 |
Physical index:
| Bulk density | Volume density | colour | PH | sintering temperature | melting point |
| 2.5-3g/cm³ | 4.0～4.8g/cm3 | black | 7-9 | > 1800°C | 2180°C |
Packing: 1000Kgs /big bag
Supply Ability: 8000Ts/month
Chrome powder/chrome fine/chrome flour:
325#:
