quartz sand

Thread Content

Quartz sand is a hard, wear-resistant silicate mineral with stable chemical properties. Its main mineral component is SiO2. Quartz sand is milky white or colorless and translucent in appearance, with a hardness of 7; it is brittle, lacks cleavage, has a conchoidal fracture surface, and exhibits a greasy luster. Its relative density is 2.65. Its chemical, thermal, and mechanical properties show significant anisotropy. It is insoluble in acids and slightly soluble in KOH solution, with a melting point of 1750°C. The colors range from milky white to light yellow, brown, and gray. Quartz has high fire resistance, and it is classified into ordinary quartz sand, refined quartz sand, acid-washed quartz sand, high-purity quartz sand, etc. The unique physical and chemical properties of quartz sand give it a vital role in the aviation, aerospace, electronics, machinery, and the rapidly developing IT industry. In particular, its internal molecular chain structure, crystal shape, and lattice variation patterns confer on it properties such as high temperature resistance, low thermal expansion coefficient, excellent insulation, corrosion resistance, piezoelectric effects, resonance effects, as well as unique optical properties – all of which enable it to play an increasingly important role in many high-tech products. Uses: Used in the manufacture of glass, refractory materials, the smelting of ferrosilicon, as metallurgical fluxes, in ceramics, as grinding materials, and in casting. In construction, quartz is utilized due to its strong resistance to erosion by acidic media; it is used to produce acid-resistant concrete and mortar. Quartz sand, as the core raw material for silicon, plays an irreplaceable and fundamental role in the production and supply of silicon raw materials. II. Main specifications and standards for quartz sand:
Name: Fine sand
Specifications (mesh): 4-6, 6-10, 10-20, 20-40, 40-70, 70-100
Fire resistance (°C): Greater than 1750, 1750, 1750, 1750, 1750, 1750
Uniformity (%): 95, 95, 95, 95, 95, 95
SiO2 content (min. %): 99.6, 99.6, 99, 98, 98.5, 98

III. Uses and functions of quartz sand
Quartz sand is an important industrial mineral raw material, widely used in industries such as glass manufacturing, foundry work, ceramics and refractory materials, metallurgy, construction, chemicals, plastics, rubber, and abrasives. Application Areas and Uses: Glass – A key raw material for flat glass, float glass, glass products (glass jars, bottles, tubes, etc.), optical glass, glass fibers, glass instruments, conductive glass, glass cloth, and special radiation-resistant glasses. Ceramics and Refractory Materials – Used as raw materials for ceramic bodies and glazes, as well as for high-silica bricks, ordinary silica bricks, and silicon carbide used in furnaces. Metallurgy – Serves as a raw material or additive, as well as a flux for materials such as metallic silicon, ferrosilicon alloys, and siluminium alloys. Construction – Used in concrete, cementing materials, road construction materials, artificial marble, and materials for testing the physical properties of cement (i.e., standard cement sand). Chemical Industry – Acts as a raw material for silicon compounds and water glass; it is also used as a filler in sulfuric acid towers and as amorphous silica powder. Machinery – Is a primary raw material for foundry molding sands, as well as a grinding material (for sandblasting, hard grinding paper, sandpaper, etc.). Electronics – Used for high-purity metallic silicon and optical fibers in communication systems. Rubber and Plastics – Used as fillers to improve wear resistance. Paints – Used as fillers to enhance the weather resistance of paints. Introduction to Quartz Sand Production Lines: I. Basic Process Overview 1. Dry method for producing quartz powder: The raw stone is first crushed by a coarse crusher; the resulting coarse particles are then transported by a belt conveyor to a fine crusher for further crushing. After fine crushing, the stones are screened using a vibrating screen to separate them into two types. Those particles that meet the required size criteria for use in sand-making machines are fed into those machines to produce sand, while the remaining particles are sent back to the fine crusher. In a sand-making machine, some of the stones are turned into sand; after being washed using a sand washer (optional), they become finished sand. The other stones are then crushed again in the same sand-making machine. 2. Production of quartz powder by water method: The main equipment includes stone knocking machines, stone rollers, drying ovens, vibrating screens, and water systems. The general process flow is as follows: Quartz ore is processed using a stone crushing machine to produce smaller stones, which are then crushed by stone rollers into sand particles. Water is added continuously during this crushing process; the water carries the sand particles to a sedimentation tank. The sand particles in the sedimentation tank are subsequently taken to a drying oven to be turned into dry sand particles. After that, they are screened using a vibrating screen, and magnets and magnetic separators are used to remove any iron present. Finally, the sorted sand particles are packaged and stored. II. Introduction to Production Line Performance: This production line features a high degree of automation, low operating costs, high crushing efficiency, energy savings, high output, low pollution, and easy maintenance. The manufactured machine-made sand meets **building sand standards, with uniform particle size, good particle shape, and proper grading.