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Wollastonite is a kind of inorganic acicular mineral, the main component is Ca3Si3O9. It is characterized by non-toxicity, chemical corrosion resistance, good thermal stability and dimensional stability, glass and pearl luster, low water absorption and oil absorption value, excellent mechanical and electrical properties and a certain reinforcement effect.
HG grade belongs to wollastonite fine powder. This type product is ground by Raymond machine. The particle size can be from 80 mesh to 400 mesh.
Raw material is careful selected and all kinds of content are satisfactory. HG grade is commonly used in ceramics, glazes, coatings, fire resistant, tempered glass and other fields.
Specification:
| INDEX | STANDARD | RESULT |
| SiO2 (%) | 49 min | 52.32 |
| CaO (%) | 42 min | 42.85 |
| Al2O3 (%) | 0.30 max | 0.18 |
| Fe2O3 (%) | 0.40 max | 0.28 |
| TiO2 (%) | 0.02 max | 0.01 |
| MgO (%) | 2.0 max | 1.51 |
| S (%) | 0.02 max | 0.01 |
| P (%) | 0.007 max | 0.003 |
| L.O.I (1050℃) (%) | 3.0 max | 2.42 |
| Whiteness | 90 min | 91.7 |