How does chromite powder work in glass manufacturing?
In order to improve some performance of glass,chromite powder will be added during manufacturing glass.
Except as pigment,chromite powder also can be added into raw material when producing glass.during glass melting,adding chromite powder,Cr3+ after melting will distribute evenly in glass.
The glass made via this way has stable and uniform color,can be used for produce high quality optics glass and aircraft instrument glass etc.
The effect of chromite powder in glass manufacturing mainly manifests as follows:
1.Increase hardness:Chromite powder can increase the hardness of glass,makes it more wear-resistant.
2.Enhance corrosion resistance,makes glass more durable under special environment.
3.Improve other performance of glass,for example,influence physical and chemical properties of glass,such as tramsparency,color stability etc
The specification of chromite powder
| Item | Unit | 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 | g/cm³ | 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 | g/cm³ | 2.6 |
| sintering point | °C | > 1,800 |
| melting temperature | °C | 2,180 |
Available sizes:200mesh 270mesh 325mesh 400mesh 600mesh 800mesh 1000mesh 1200mesh 1500mesh 2000mesh 2500mesh etc
