Chrome flour is ground to fine size by chromite sand.
Zhengzhou Haixu Abrasives Co.,ltd,founded in 1999,at 2018,started to import chrome ore and process in China port,then export to all over the world again.
About the sizes,we mainly produce AFS25-35 AFS35-40 AFS40-45 AFS 45-50 AFS50-55,which mainly are used in foundry filed such as steel factory.Besides,the fine size 140MESH-0,we usually grind it again and make it finer to 200mesh ,325mesh even 400mesh which mainly used in glass,chemical fields as colorant,pigment etc
In the market,chrome flour is used most,now introduce the specification of chrome flour 325mesh as follows:
PHYSICAL AND CHEMICAL INDEX
| Item | Unit | Index |
| Cr2O3 | % | ≥45.0% |
| SiO2 | % | ≤2.0% |
| 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 |
