Glass-Grade Silica Sand

Glass-Grade Silica Sand from Pakistan

Glass-grade silica sand is a key raw material in glass production, making up 50-70% of the batch mix in most glass formulations. It provides the essential SiO₂ that forms the structural framework of the glass. High chemical purity, low iron content, and tight control over grain sizing are crucial parameters for glass sand. Pakistan’s silica sand deposits rank among the purest in the region, with SiO₂ content reaching 99.8% and Fe₂O₃ as low as 0.02%.

Typical Composition

• SiO₂: 99.5-99.8%

• Fe₂O₃: 0.02-0.06%

• Al₂O₃: 0.1-0.3%

• TiO₂: < 0.03%

• CaO + MgO: < 0.1%

• Cr₂O₃: < 30 ppm

• Na₂O + K₂O: < 0.1%

• LOI: < 0.25%

Standard Sizes

• 20-40 mesh (0.84-0.42 mm)

• 30-50 mesh (0.60-0.30 mm)

• 40-70 mesh (0.42-0.21 mm)

• Custom sizings available

Key Specifications

• Grain Shape: Sub-angular to rounded

• Grain Sphericity: > 0.6

• Bulk Density: 1.5-1.7 g/cm³

• Specific Gravity: 2.65

• Hardness (Mohs): 7

• Sintering Point: 1500-1550 °C

Quality Assurance

Each lot includes a Certificate of Analysis reporting chemical composition, loss on ignition, and grain size distribution. Pre-shipment samples are provided for approval. Independent lab testing is available on request.