Quarzsand

Quarzsand, or quartz sand, is a natural granular material dominated by quartz (SiO2). It forms from the weathering and transport of silica-rich rocks and is found in riverbeds, deserts, and coastal dunes. Purity varies, but higher-quality grades contain typically more than 95% SiO2 with minor amounts of feldspars, iron oxides, and clays.

Quartz sand is chemically inert and hard (Mohs hardness around 7), with high heat resistance and good chemical stability. Depending on the deposit and processing, colors range from white to light brown, and particle sizes are graded for different uses—from fine sands used in filtration to coarse grains used in construction and foundry work.

Processing involves mining, washing, drying, and screening to achieve the desired granulation and impurity content. Some grades undergo additional beneficiation (such as magnetic or gravity separation) to reduce iron content for glassmaking or electronics-grade applications.

Uses of Quarzsand are diverse. The most common are glass manufacturing, where high-purity silica is essential; foundry sands for metal casting; construction and civil engineering as an aggregate or filler; filtration media for drinking water, beverage processing, and swimming pools; ceramics, tiles, and coatings; and as a raw material for silicon production in the semiconductor industry.

Safety and environmental considerations are important. Handling silica sand can generate respirable crystalline silica dust, which poses risks of silicosis and other lung diseases. Proper dust suppression, ventilation, and personal protective equipment are required, along with adherence to occupational exposure limits. Environmental aspects include responsible mining practices, water management, and site restoration after extraction.