Quartz Sand Applications in 10 Different Industrial Fields

Quartz sand is an important raw material for nearly 100 kinds of industrial products, such as glass, electronics and electrical appliances, optical fiber semiconductors, water treatment, mechanical casting, artificial quartz stone, daily ceramics, metallurgy, superhard materials, chemical industry, cement, functional fillers, oil drilling and so on.

The quality requirements of quartz products are also different in different industrial applications. In this article, we will learn how quartz sand is used in 10 different industrial fields:

quartz sand uses

1. Glass Industry

Quartz is the main raw material of glass industry, and its quality requirements lay in 3 aspects: chemical composition, stability and particle size.

Quartz Sand For Flat Glass
LevelComponent %Particle Size %
1+SiO₂ ≥Al₂O₃ ≥Fe₂O₃ ≥+1mm800μm710μm500μm-100μm
98.5±0.201.0±0.100.05±0.010.500.55.55.0
198.0±0.250.10//10.010.0
296.0±0.302.0±0.150.2020.0
392.0±0.304.5±0.200.2525.0
490.0±0.305.5±0.300.3330.0

2. Electronic & Electrical Industries

In the electronic and electrical industry, quartz powder (silicon powder) is an important functional filler for epoxy resin castables, filling materials, plastic sealing materials, packaging materials, engineering plastics, coatings, silicone rubber and electrode protective coatings. At present, the highest filling rate of spherical silicon powder in EMC has reached > 90%.

Silicon Powder For Electronic Industry
TypeSiliconActive SiliconElectrical SiliconActive Electrical Silicon
Moisture / %≤0.10
Density (10³kg/m³)2.65±0.05
ComponentBurning Vector≤0.20≤0.15
SiO₂≥99.40≥99.60
Fe₂O₃≤0.030≤0.020
Al₂O₃≤0.20≤0.15
Hydrophobicity / min≥30≥45

3. High-end Quartz Material Industry

High-purity quartz sand is an important raw material for producing high-purity quartz tubes, quartz rods, quartz bars, quartz plates, quartz crucibles and other high-end quartz products. Optical communications, semiconductors, special materials usually require the purity of quartz sand > 99.998%, the impurities content < 22ppm, and the single alkali metals (potassium, sodium, lithium) content is less than 1ppm.

TypeRequirement
Appearancewhite particles with certain transparency, without any color difference
Particle Sizein the range of 70-350 μm
SiO / %≥ 99.99%, on ignition loss ≤ 0.01%

4. Water Treatment Industry

quartz sand for filter

Quartz Filter: Quartz sand filter material is made of natural quartz ore as raw material and processed by crushing, washing, screening and other processes. it is the most widely used water purification material in water treatment industry

Quartz sand is the earliest and widely used filter material for wastewater treatment. The particle size and thickness of quartz sand filter media play an important role in the filtration performance.

Quartz Sand Filter Media
TypeRequirement
SiO₂ Content≥85%
Physical PropertiesSolid, durable, compact
Density2.5-2.7g/cm³
Mud Content<1%
Burning Vector≤0.7%
Particle Size0.5-1.2mm

5. Mechanical Foundry

In foundry casting process, silica sand (quartz sand) is the most widely used and largest amount of foundry sand. According to the different mining and processing methods, it can be divided into natural silica sand and artificial silica sand, such as water washed sand and scrubbed sand etc.

casting sand

Casting Sand: The quality of silica sand directly affects the quality of castings, production efficiency and enterprise cost

Silicon Sand For Casting
GranularityFine Powder Conten t/ %
Scrub SandWashing SandArtificial Sand
30/50≤0.1≤0.5≤0.5
40/70≤0.1≤1.0≤1.0
50/100≤0.4≤3.0≤1.5
70/140≤0.7≤3.5≤2.0
100/200≤8.0≤10.0≤10.0

6. Artificial Quartz Stone Plate

Artificial quartz is composed of more than 90% natural quartz sand (powder) of aggregate, about 10% of pigments, resins and other additives that regulate adhesion and curing, etc. Such as vein ore quartz, sand (rock) ore quartz and weathered quartzs all can be used as raw materials for artificial quartz.

Quartz Sand For Artificial Quartz Stone
TypeRequirement
AppearanceThe color is uniform, the miscellaneous particles < 2%, there is no dust, and the particles are clean
ShapeThe higher the sphericity, the better
Particle SizeMatch according to demand
WhitenessQuartz sand is not required, quartz powder > 90
MoistureMoisture < 0.5%

7. Domestic Ceramics

As the raw material of ceramics, quartz has non-plasticity. Quartz transformed into mullite crystals under high temperature and makes porcelain has high mechanical strength and chemical stability. Quartz can increase the translucency of the green body, so it is a good raw material for preparing white glaze.

ceramics

Ceramics: The main raw materials of ceramics are high purity quartz sand, which can be used in glazes, blanks, daily ceramics, sanitary ware, household decoration tiles, floor tiles, quartz kitchen countertops, cabinets, etc.

Quartz Sand For Ceramics
TypeGradeChemical Composition
SiO₂ ≥Fe₂O₃ + TiO₂ ≤TiO₂ ≤
Block Quartz1990.080.02
2980.150.03
3960.250.05
Quartz Sand1980.100.03
2970.200.05
3950.400.10

8. Metallurgical Industry

In the metallurgical industry, quartz can be used to make refractories (silica brick), smelting siliceous alloys (ferrosilicon, silicomanganese, silicochromium) or as fluxes. Those with high silica content can be used as raw materials for industrial silicon production.

ferrosilicon

Ferrosilicon: Ferrosilicon is an iron-silicon alloy made from coke, steel shavings, quartz (or silica) and smelted in an electric furnace

Silica For Refractories
TypeChemical CompositionFire Resistance
(CN)
SiO₂ ≥Al₂O₃ ≤Fe₂O₃ ≤CaO ≤
GSN99A99.00.250.50.15174
GSN99B99.00.300.50.15174
GSN9898.00.500.80.20174
GSN9797.01.001.00.30172
GSN9696.01.301.30.40170

9. Super Hard Material

Industrial silicon carbide is divided into black silicon carbide and green silicon carbide. Black silicon carbide is made by high temperature smelting in resistance furnace with quartz sand, petroleum coke and high quality silica as the main raw materials. Green silicon carbide is made by high temperature smelting in resistance furnace with petroleum coke and high quality silica as main raw materials and salt as additive.

Green Silicon Carbide
Granularity / mm> 4.5> 3.53.5 1.01.0-0.5< 0.5Color
Content / %0< 2> 85<130White
translucent
Chemical ElementSiO₂FeO+Al₂O₃+CaO+MgOBurning vector
Content/%> 99.4< 0.3< 0.3
Black Silicon Carbide
Granularity / mm> 33-1.51.5-1.01.0-0.5< 0.5Color
Content / %0≈ 6535< 50White
or
grayish
white
Chemical ElementSiO₂FeO+Al₂O₃+CaO+MgOBurning vector
Content / %> 99.3< 0.35< 0.35

10. Chemical Industry

In the field of chemical products processing, quartz sand is the main raw material for the production of potassium silicate, sodium silicate and various forms of silicon dioxide.

sodium silicate

Sodium Silicate: Sodium Silicate is a colorless, slightly colored translucent or transparent bulk vitreous body, used as fillers, fabric fireproofing agents and adhesives, etc.

Quartz Sand For Sodium Silicate
Chemical ElementQuality / %Particle Size
SiO₂> 99.50.991mm no
Fe₂O₃< 0.030.833mm no
Al₂O₃0.010.5mm < 4%
CaO + MgO< 0.100.35mm < 25%
TiO₂< 0.030.105mm < 5%
ZrO₂< 0.01
NaO + K₂O0.1
Moisture< 0.10
Cr₂O₃< 0.001



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