Quartz Sand
Quartz sand is a natural mineral material primarily composed of silicon dioxide (SiO₂), produced by crushing, screening, and processing quartz rock. Due to its high hardness, chemical stability, and heat resistance, it is widely used in various industrial fields.
Description
Characteristics
Competitive advantage
The company conducted a competitive advantage analysis to identify its strengths and weaknesses compared to its rivals.
High Hardness:
Mohs hardness of 7, with strong wear resistance.
01
Chemical Inertness:
Resistant to acids (except hydrofluoric acid) and corrosion, minimally reactive with most chemicals.
02
High market share
Heat Resistance: Melting point around 1750°C, suitable for high-temperature environments.
03
Perfect product system
Insulation: Excellent electrical insulation properties.
04
Efficient after-sales service
Color & Form: Typically white or colorless transparent granules; may appear yellow, red, etc., when impurities are present.
05
Classification & Specifications
- Natural Quartz Sand
- High-Purity Quartz Sand
By Particle Size
Common specifications
Coarse sand:
- 4-6 mesh (4.75-3.35mm)
- 6-10 mesh (3.35-2mm)
- 10-20 mesh (2-0.85mm)
- Application: building concrete, roadbed materials, filter pool fillers, etc.
01
Medium sand:
- 20-40 mesh (0.85-0.425mm)
- 40-70 mesh (0.425-0.212mm)
- Application: glass manufacturing, casting sand, abrasives, etc.
02
Fine sand:
- 70-140 mesh (0.212-0.106mm)
- 140-270 mesh (0.106-0.053mm)
- Application: ceramics, coatings, water treatment filtration, etc.
03
Ultra fine sand (powder):
- 270-325 mesh (0.053-0.045mm)
- 325 mesh and above (＜0.045mm)
- Application: electronic materials, cosmetics, precision casting, etc.
04
Applications
- Glass Industry: Core material for flat glass and container glass (over 70% of total usage).
- Foundry: Molding sand for high-temperature metal casting.
- Water Treatment: Filtration medium to remove suspended solids.
- Electronics: High-purity sand for silicon micro powder and semiconductor packaging.
- Chemical Industry: Acid-resistant fillers, ceramic glazes.
- Construction: Artificial stone, floor screed, tile adhesives.
- Others: Sandblasting, golf course bunkers, petroleum fracturing proppants (resin-coated sand).
Processing Techniques
1. Mining & Crushing
2. Washing/Acid Leaching
3. Magnetic Separation
4. Screening
5. Calcination/Purification (high-purity sand)
Properties
|
Physical Properties |
Values |
|
Purity |
＞99.99% |
|
Density |
2.2g/cm3 |
|
Transparency |
＞90% |
|
Mohs Hardness |
5.5--6.5 |
|
Deformation Point |
1280℃ |
|
Softening Point |
1750℃ |
|
Annealing Point |
1250℃ |
|
Specific Heat (20 - 350°C) |
670J/kg.℃ |
|
Thermal Conductivity (20°C) |
1.4W/m.℃ |
|
Heat Conductivity (w/m.k,1000 ℃ ) |
1.0-1.2 |
|
Refractive Index |
1.4585 |
|
Coefficient of Thermal Expansion |
5.510 -7cm/cm.℃ |
|
Hot - working Temperature |
1750--2050℃ |
|
Short - term Service Temperature |
1450℃ |
|
Long - term Service Temperature |
1100℃ |
|
Chemical Properties |
Values |
|
Acid resistant |
Strong Acid(except HF),Strong alkali, organic solution |
|
High temperatures Corrosion resistant |
Excellent |
|
Metal Impurity Content |
＜5 ppm |
|
Electrical Properties |
Values |
|
Resistivity |
7107Ω.cm |
|
Insulation Strength |
250~400Kv/cm |
|
Dielectric Constant |
3.7~3.9 |
|
Dielectric Absorption Coefficient |
＜410-4 |
|
Dielectric Loss Coefficient |
＜110-4 |
|
Mechanical Properties |
Values |
|
Compressive Strength |
1100MPa |
|
Bending Strength |
67MPa |
|
Tensile Strength |
48MPa |
|
Poisson's Ratio |
0.14~0.17 |
|
Young's Modulus |
72000MPa |
|
Shear Modulus |
31000MPa |
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