Quartz Sand: A Vital Industrial Mineral

1. Water Treatment
Quartz sand is the earliest and most widely used filtration medium for wastewater treatment, effectively removing inorganic/organic impurities.

Standard quartz sand suffices for most filtration.

Power plants use highly refined quartz sand (pure white, dust-free, high strength) for resin cushion layers.

Modified quartz sand enhances performance for challenging wastewater.

2. Glass Industry
Silica (SiO₂) forms the structural backbone of glass, ensuring strength and chemical stability. Quartz sand is the primary raw material for:

Flat glass (20% of total quartz sand use)

Daily-use glass, ultra-clear glass, PV glass, quartz glass

Silicate glass (40%+ of total quartz sand production)

3. Foundry (Metal Casting)
Silica sand (quartz sand) is the most widely used refractory molding sand, classified as:

Natural sand (water-washed, scrubbed, selected): For non-ferrous/iron castings.

Synthetic sand: For steel castings.

4. Artificial Quartz Stone
Comprising 90%+ natural quartz sand/powder and 10% resins/additives, artificial quartz stone is a popular decorative material. Vein quartz is the dominant raw material.

5. Metallurgy
Quartz is used for:

Refractories (silica bricks)

Silicon alloys (ferrosilicon, silicon manganese, silicon chromium)

Industrial silicon production (requires SiO₂ >97%)

6. Ceramics
Quartz constitutes up to 40% of ceramic bodies/glazes, critical for:

Daily ceramics, high-silica ceramics

Glazes (10–30% quartz content)
Key quality metrics: Purity, Fe/Ti content, particle size/shape.

7. Functional Fillers
Ground quartz (silica powder) is used in:

Epoxy molding compounds (EMC, 60–90% filler)

Copper-clad laminates, insulation materials, plastics, cosmetics

8. Superhard Materials
Quartz sand is a key ingredient for black/green silicon carbide production via high-temperature smelting.

9. Chemical Industry
Quartz sand produces:

Sodium silicate (water glass, 90%+ of soluble silicates)

Potassium silicate, silica derivatives
Purity requirements: Fe₂O₃ <0.03%, Al₂O₃/CaO <0.1%.

10. Petroleum Industry
Quartz sand dominates proppants (85.6% of China National Petroleum’s 2022 usage) for shale gas/oil fracturing.

11. Fiberglass
Quartz sand (with limestone, colemanite) accounts for ~21.7% of production costs, used in construction, automotive, and wind energy.

12. Calcium Silicate Boards
Quartz sand comprises 40% of raw materials for these fire-resistant building panels.

High-End Applications of Quartz Sand
13. Photovoltaics (PV)
HP quartz sand is used for:

Diffusion tubes, carriers, crucibles

Quartz crucibles (outer/middle/inner layers: ¥50k/¥100–120k/¥190–220k per ton; imported: ¥600k/ton)

14. Semiconductors
UHP quartz sand (¥1M/ton, mostly imported) produces:

Quartz tubes, rods, crucibles
Requirements: Low Fe/alkali metals, tight particle distribution.

15. Lighting
Quartz glass (from HP sand) enables UV-IR transmission for:

Halogen lamps, HID lights, UV sterilization lamps
Top supplier: Sibelco’s IOTA-series sand.

16. Fiber Optics
HP quartz sand (¥45–55k/ton) is vital for:

Fiber preforms (70% of fiber value)

Quartz sleeves, target rods

17. Aerospace
Radiation-resistant quartz glass (from HP sand) is used in:

Satellite sensors, missile radomes, stealth materials

Quartz fiber for antennae, electromagnetic windows

18. Optics
Quartz glass (melted from HP sand) is key for:

Spectrometers, IR cameras, lenses

High-temperature observation windows, telescopes

Optimizing Quartz Sand Production with Square Swing Screeners
To meet diverse industry standards, square swing screeners ensure:
✔ Precise particle classification (crucial for PV/semiconductor-grade sand)
✔ Dust reduction & high throughput
✔ Consistent sizing for ceramics/foundry applications

Source: Industry reports. Contact for removal if copyrighted.