Silica sand glass grade

Description

1. Product Overview
This premium-grade Silica Sand (SiO₂ ≥ 99.5%) is a high-purity industrial mineral specifically engineered for flat glass, container glass, and fiberglass manufacturing. It delivers exceptional iron oxide (Fe₂O₃) control to ensure crystal-clear transparency and UV transmission consistency. As the single most critical raw material by volume in glassmaking, its strategic importance lies in directly reducing energy consumption during melting while minimizing refractory wear—directly improving your furnace yield and final product optical quality.

2. Key Specifications & Technical Characteristics

• Chemical Composition: SiO₂ ≥ 99.5%, Fe₂O₃ ≤ 0.015% (ultra-low iron grade available), Al₂O₃ ≤ 0.20%, TiO₂ ≤ 0.03%

• Purity Level: 99.5% – 99.9% (customizable to soda-lime, borosilicate, or specialty glass specs)

• Physical Form: Sub-angular to rounded grains; off-white to clear color

• Particle Size Distribution: Standard: 0.1 – 0.5 mm (100–140 mesh); custom cuts (0.075 – 0.85 mm) available

• Bulk Density: Loose: 1.45 – 1.55 g/cm³; Tamped: 1.60 – 1.70 g/cm³

• Moisture Content: ≤ 0.05% as shipped (kiln-dried)

• Packaging Options: 1.5 MT bulk bags, 50 kg HDPE valve bags, or pneumatic tanker truck / vessel loading

• Shelf Life: Unlimited when stored in dry, covered conditions

3. Core Industrial Applications

• Flat Glass (Architectural & Automotive): Enables >91% light transmission with minimal green tint; precise grain uniformity reduces melt segregation and bubble formation.

• Container Glass (Bottles & Jars): Optimizes hot-end forming efficiency; low refractory solubility extends furnace campaigns by 15–20% versus standard sands.

• Fiberglass (Insulation & Reinforcement): Meets ASTM C166 compliant sizing for continuous filament; reduced devitrification during bushing drawing lowers breakage rates.

• Specialty Glass (Solar PV & Display Panels): Sub-20 ppm Fe₂O₃ grade achieves >92% transmissivity for photovoltaic cover glass, directly improving module efficiency by 0.4–0.6%.

Performance advantage: Narrow particle size distribution (Span < 1.2) reduces segregation in hoppers, cutting batch homogenization time by 12% compared to industry averages.

4. Competitive Advantages

• Quality Consistency: ISO 9001:2025 certified with real-time XRF analysis per 250 MT lot; coefficient of variation for Fe₂O₃ < 3% over 12 consecutive months.

• Supply Reliability: Dual-sourced mines + 60,000 MT covered warehouse capacity; guaranteed 98.5% on-time-in-full (OTIF) performance.

• Logistics Capability: Dedicated rail spurs and 3 deep-water port terminals (US Gulf, Rotterdam, Shanghai) enabling 7-day average lead time to major glass clusters.

• Price Competitiveness: 8–10% below European/NA benchmarks for equivalent 99.5% grade due to continuous attrition scrubbing vs. flotation processing.

• Sustainability: Zero-chemical beneficiation (dry gravity circuits); 85% recycled process water; available Life Cycle Assessment (LCA) data for Scope 3 reporting.

• Technical Support: Free monthly statistical process control (SPC) reports + on-site troubleshooting of melt chemistry by certified ceramists.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): BULK 20 MT (twenty metric tons) per shipment

• Loading Capacity (20FT container): 25 MT (truck/rail bulk pneumatic)

• Loading Capacity (40FT container): 27 MT (bulk bags), 28.5 MT (loose pneumatic)

• Loading Capacity (Handysize vessel): 5,000 – 8,000 MT per hold

• Incoterms supported: EXW, FOB, CFR, CIF

• Lead time for samples: 3 business days (2 kg representative lot with CoA)

• Lead time for bulk: 15 days from order confirmation and LC/DP receipt