Quartz Sand Filter Media
CAS Number: 14808-60-7
Quartz sand filter media (SiO₂ ≥99%) is the standard primary filtration layer in dual-media and multi-media gravity/pressure filters. Round-grained silica particles classified to specific mesh ranges (16-30, 8-16, 4-8) trap suspended solids by mechanical straining plus interstitial adhesion. Pingdingshan and Lingshou (Hebei) deposits supply the bulk of Chinese export grade — chemically inert, abrasion-resistant, NSF/ANSI 61 compliant for drinking water.
Technical Specifications
| appearance | Round white to light yellow granules |
| mesh ranges | 4-8, 8-16, 16-30, 30-60 (commonly stocked) |
| SiO2 content | ≥ 99.0 wt% |
| bulk density | 1.5-1.7 g/cm³ |
| Mohs hardness | 7.0 |
| moisture content | ≤ 0.3 wt% |
| particle size (d50) | 0.5-2.0 mm (mesh-dependent) |
| loss on hydrochloric acid | ≤ 0.5 wt% (24 h, 20% HCl) |
Applications
- Municipal drinking water pre-treatment (rapid sand filter, slow sand filter)
- Industrial process water filtration before RO / IX systems
- Swimming pool sand filters
- Sewage tertiary treatment polishing
- Iron and manganese removal (multi-media stack with manganese sand)
- Sandblasting and shot-blasting media
Key Features
- Round-grain (water-washed) for low headloss and even bed expansion during backwash
- Chemically inert across pH 0-14 — no leaching of contaminants
- Mohs 7.0 hardness — minimal attrition during 10+ year service life
- NSF/ANSI 61 grades available for drinking water on request
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