Casting grade chrome sand composition index: quality requirements: in line with technical standards JB/T6984-1993, the specific requirements are as follows :
AFS45-50：
| Project | Cr2O2 | SiO2 | CaO(%) | Calcination reduction | Water Content(%) | Refractoriness C |
| Indicators | ≥45.5 | ≤1 | ≤1 | ≤0.5 | ≤0.5 | >1800 |
AFS35-40 :
| Project | Cr2O2 | SiO2 | CaO(%) | Calcination reduction | Water Content(%) | Refractoriness C |
| Indicators | ≥45.5 | ≤1 | ≤1 | ≤1 | ≤0.5 | >1800 |
AFS40-45 :
| Project | Cr2O2 | SiO2 | CaO(%) | Calcination reduction | Water Content(%) | Refractoriness C |
| Indicators | ≥45 | ≤3 | ≤1 | ≤0.5 | ≤0.5 | >1800 |
Granularity: 20-40 mesh; 20-70 mesh; 20-80 mesh; 20-100 mesh; 40-70 mesh; 50-100 mesh;
70-140 mesh; 220 mesh; 325 mesh series casting grade products, suitable For drainage sand materials, casting, ceramics, glass and refractory materials, etc.
Generally, the suitable sand size for large steel castings is 40-70 mesh, and the size of sand used for medium and small parts is 50-100 mesh. There are also some special cases, such as: some small pump industry, considering the economic factors, replacing zirconia sand with chrome ore. The chrome ore purchased by these factories requires very fine, requiring 70-140 mesh, even 100-200 mesh, and so on.
