不同行业对石英砂的多元需求与应用全景

Group 1: Quartz Sand Characteristics and Applications - Different industries have varying requirements for the composition, granularity, and sphericity of quartz sand, with high-purity quartz sand (SiO2 content > 99.99%) primarily used in high-purity quartz glass and silicon micro-powder, which have strict impurity content requirements [1] - Quartz sand with SiO2 content between 99.9% and 99.99% is mainly used in high-end silicon micro-powder, sodium silicate, photovoltaic glass, and high-grade glass, with supply currently in a "tight balance" state [1] - Quartz sand with SiO2 content below 99.9% is utilized in bulk applications such as flat glass, casting, metallurgy, refractory materials, ceramics, fracturing sand, water treatment, and construction materials, where supply is currently abundant [1] Group 2: Types of Silica Raw Materials - Various types of silica raw materials include vein quartz, quartz sandstone, quartzite, natural quartz sand, powdered quartz, crystal, and granite pegmatite, each with distinct characteristics and applications [5][6][7] - Vein quartz typically has a high SiO2 grade (> 98%) and is used for high-end glass and high-purity quartz products, while quartz sandstone is widely used in glass, ceramics, metallurgy, and refractory materials due to its high-grade and large-scale availability [6][7] - Natural quartz sand has a SiO2 grade > 90% and is primarily used in metallurgy, ceramics, and casting, while powdered quartz is used in wear-resistant materials and ceramics due to its high purity [7] Group 3: Quartz Applications in Various Industries - The glass industry is the largest consumer of quartz resources, with significant applications in construction, automotive, renewable energy, and medical fields, consuming approximately 3,406 million tons of quartz sand in 2021 [10][11] - The casting sand sector is the second-largest consumer of quartz resources, with an annual consumption of about 3,300 million tons, primarily sourced from quartz sandstone and natural quartz sand [13] - Industrial silicon, produced from quartz and carbon reductants, is crucial for the silicon-based new materials industry, with an estimated production of 2.61 million tons in 2021 [14] Group 4: High-Purity Quartz Applications - High-purity quartz is essential for high-tech products in strategic emerging industries, including semiconductors, photovoltaics, and aerospace, due to its excellent physical and chemical properties [20] - In the semiconductor field, high-purity quartz is used for quartz crucibles and other materials in the silicon wafer manufacturing process, with specific purity requirements for different applications [20][21] - The photovoltaic industry relies on high-purity quartz for producing quartz crucibles and ultra-white low-iron glass, which are critical for solar energy applications [21][22]