High-purity silica powder is a hard, wear-resistant, chemically stable silicate mineral. Its main mineral component is SiO2. The color of quartz sand is milky white or colorless and translucent, with a hardness of 7, and it is brittle without cleavage. , Shell-shaped fracture, grease luster, density of 2.65, bulk density (20-200 mesh is 1.5), its chemical, thermal and mechanical properties have obvious anisotropy, insoluble in acid, slightly soluble in KOH solution, melting point 1650℃ . After the quartz stone mined from the mine is processed, the product with a fineness below 120 mesh (less than 120 mesh) is generally called quartz sand. Products with more than 120 mesh are called quartz powder.

Quartz powder is divided into two production methods, dry method and water method, with various conventional specifications: 100M, 150M, 200M, 325M, 400M, 600M, 1500M and 2000M (M is the mesh). In addition, special-shaped specifications can also be processed according to customer requirements, and those with particle size distribution can generally be processed.

The main equipment for producing quartz powder by dry method is stone crusher, grinder, vibrating screen, etc. The technological process is that the quartz stone material is processed into smaller stones by a knocking stone machine, and the stones are processed by a crusher to process sand particles, and then screened by a vibrating screen. In the screening process, the magnet rods and row magnets are used to remove iron, and then packed Finished storage.

The main equipment for producing quartz powder by water method is stone crushing machine, stone mill, roasting room, vibrating screen, waterway system, etc.

The process flow is roughly as follows: the quartz stone material is processed into smaller stones by a knocking stone machine, and the stones are then rolled into sand grains. Water is continuously added during the rolling, and the water flows into the sedimentation tank with the sand particles, and then the sedimentation tank The sand grains are transported into the baking room and baked into dry sand grains, and then sieved through a vibrating screen. In the screening process, the magnet rods and the row magnets are used to remove iron, and then they are packed into storage.

Quartz powder produced by dry method is divided into two grades: ordinary quartz powder and refined quartz powder. When the quartz stone is mined from the mountain, it has a yellowish-brown skin. The product selected for direct crushing and screening of smaller quartz stone is called ordinary quartz powder. The appearance is yellowish brown and white. Its advantage is that the price is low, but the disadvantage is that there are more impurities, so it is mostly used in the construction industry. After artificially removing the yellow-brown skin on the surface of the mineral material, the refined quartz powder is reprocessed, and its appearance is white and shiny, just like white sugar. The price is higher due to the time-consuming and material-consuming processing.

The quartz powder produced by the water method is divided into ordinary quartz powder and refined quartz powder. The smaller quartz stone is processed into ordinary quartz powder, and the large quartz stone is processed into refined quartz powder. Compared with dry method quartz powder, water method quartz powder produces less equipment iron and washes away impurities with water during the production process. For example, the iron content and impurities are less than dry method quartz powder, but its processing is more labor-intensive. Material, so the price is higher.

The above is a brief introduction to the production process of high-purity silicon powder, which you can briefly understand. The content is for your reference only, you can contact us if you need to consult.