Chromite Sand Powder is a special sand for casting, which is a natural spinel mainly composed of chromite. It is crushed and sieved into the specified particle size, and is suitable for molding (core making) sand.Chromium ore sand has a good anti-alkaline slag effect and does not react with iron oxide, etc. Therefore, in practical application, chrome ore sand can avoid thermochemical sand sticking;High fire resistance, low thermal expansion coefficient, no reaction with metal oxides, and can effectively prevent casting defects such as veins and sand inclusion.
Chromite Sand Powder Physical & Chemical
| Item | Index |
| Cr2O3 | ≥46.0% |
| SiO2 | ≤1.0% |
| FeO | ≤26.5% |
| CaO | ≤0.30% |
| MgO | ≤10.0% |
| Al2O3 | ≤15.5% |
| P | ≤0.003% |
| S | ≤0.003% |
| Cr/Fe | 1.55:1 |
| Bulk Density | 2.5-3 |
| Color | Black |
| PH | 7-9 |
| The amount of the acid | ≤ 2 ML |
| Percent soil | ≤0.1% |
| Percent Moisture | ≤0.1% |
| The sintered | 1600℃ |
| Percentage of free acid present in the sand | 0 |
| filling density | 2.6g/cm³ |
| sintering point | > 1800°C |
| melting temperature | 2180°C |
Chromite Sand Powder Application
Chromium-iron ore is mainly used for surface sand of large steel castings in casting production to prevent sand sticking on the surface of castings; Secondly, grinding it into refractory aggregate for casting coating; Chromium-iron ore is a chilling material, which can replace some chills in molding (core making).It is suitable for raw sand and coatings for gradually molding cores of various stainless steels, alloy steels and carbon steels.
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