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Guide of High-Purity Quartz Sand for Photovoltaic

ShirleyShirley Dec 21, 2023Dec 21, 2023 288288
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Photovoltaic quartz sand refers to high-purity quartz sand that meets the requirements of the photovoltaic industry. It is one of the important raw materials in photovoltaic power generation systems and is mainly used to make silicon wafers in photovoltaic panels. The purity and quality of photovoltaic quartz sand directly affect the performance and life of photovoltaic panels, so its production, processing and use have strict requirements.

01Photovoltaic quartz sand quality requirements

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Chemical composition

The chemical composition of photovoltaic quartz sand should comply with national standards. The silica content should be greater than or equal to 99.9%, and the iron, aluminum, calcium and other impurity content should be less than 0.1%.

Particle size distribution

The particle size distribution of photovoltaic quartz sand should be uniform. Generally, the particle size is required to be between 0.1-0.3mm, and the cumulative mass fraction within this particle size range should be greater than or equal to 90%.

Impurity content

The impurity content of photovoltaic quartz sand should be less than 0.02%, and the content of alkali metals such as potassium, lithium, and sodium should be less than 2.5 μg/g.

Purity levels

The purity level of photovoltaic quartz sand is very high and needs to reach 3N or less (SiO2=99.98%) to ensure the performance and life of photovoltaic panels.

Resistance to crystallization

The crystallization resistance requirements of photovoltaic quartz sand are also very high. The quartz sand is required not to easily precipitate crystals at high temperatures to ensure the stability and life of photovoltaic panels.

Surface treatment

Photovoltaic quartz sand generally requires surface treatment to improve its compatibility with resin and reduce surface activity, thereby improving the quality and performance of photovoltaic panels.

Hardness

The hardness of photovoltaic sand should comply with national standards, generally between level 7 and 8.

Colors

The color of photovoltaic sand should be white or light yellow, with uniform color and no abnormal color.

Grains

Photovoltaic sand should be granular, with a smooth surface, no sharp corners, and no dust.

To sum up, the technical requirements standards for photovoltaic quartz sand are to ensure its purity, stability, particle size distribution and impurity content, so as to meet the performance and quality control needs of photovoltaic power generation products.

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02Preparation of photovoltaic quartz sand

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The preparation of photovoltaic quartz sand mainly includes ore selection, crushing, grinding, scrubbing, screening, magnetic separation, dehydration and other processes. The specific process is as follows:

Ore selection: Select high-quality quartz ore that meets the requirements of the photovoltaic industry, which requires low content of impurities such as iron, aluminum, and calcium and high silica content.

Crushing: Breaking large pieces of quartz ore into smaller pieces for subsequent grinding.

Grinding: Put the crushed quartz ore into a grinder, add grinding media (such as steel balls, etc.), and grind it to a certain fineness.

Scrubbing: Clean the quartz sand after grinding to remove surface impurities and ensure the purity and quality of the quartz sand.

Screening: The scrubbed quartz sand is screened through a classifier to remove sand that is too large or too small to obtain quartz sand with uniform particle size.

Magnetic separation: Pass the screened quartz sand through a magnetic separator to purify impurities and purify it to the requirements of photovoltaic quartz sand.

Dehydration: Dehydrate the qualified quartz sand to reduce the water content of the quartz sand.

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03Application of photovoltaic quartz sand

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Photovoltaic quartz sand is one of the important raw materials in photovoltaic power generation systems and is mainly used to make silicon wafers in photovoltaic panels. Its quality directly affects the performance and life of photovoltaic panels, so its production, processing and use have strict requirements.

In the production of photovoltaic panels, silicon wafers are one of the core components, and their quality and performance determine the power generation efficiency and service life of photovoltaic panels. Photovoltaic quartz sand is one of the main raw materials for making silicon wafers. Its purity and quality directly affect the quality and performance of silicon wafers. Therefore, the production and processing of photovoltaic quartz sand need to be carried out in strict accordance with the requirements of the photovoltaic industry to ensure its quality and purity.

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04Development prospects of photovoltaic quartz sand

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As the global demand for clean energy continues to increase, the photovoltaic power generation industry is also developing rapidly. As one of the important raw materials in photovoltaic power generation systems, the demand for photovoltaic quartz sand is also increasing.

05To Wrap Up

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In the future, with the continuous development of the photovoltaic industry, the market demand for photovoltaic quartz sand will continue to increase. At the same time, with the continuous advancement of science and technology, the production technology and processing technology of photovoltaic quartz sand will continue to be improved and perfected, and its quality and performance will also continue to improve. Therefore, the photovoltaic quartz sand industry has broad development prospects.

Click to know the high purity quartz sand beneficiation method and processing line.

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