Quartz stone, quartz sand, and silica powder are mainly composed of silica. What is the difference between the three? What are their respective roles?

Quartz stone is an environmentally friendly and green new building material that is free of radioactive pollution and can be reused. It is based on unsaturated polyester resin (UPR) or methacrylic resin (PMMA) organic polymer material as a matrix, quartz stone powder, particles, etc. as fillers, pigments and other auxiliary agents are added, and it is a polymer formed by vacuum and high pressure. Composite materials. Quartzite is a stable mineral at room temperature and is insoluble in water, sulfuric acid, hydrochloric acid, and nitric acid. The hardness is 7, the specific gravity is about 2.65, and the melting point is 1713°C. The gloss is glassy and sometimes fatty. Those with pure texture are colorless; those with impurities are red, yellow, blue, black, brown, purple, and green; transparent to opaque, and brittle. The fracture is shell-like or jagged. The crystal is in the shape of a hexagonal column with horizontal stripes on the column. There is a difference between the left crystal and the right crystal. Twin crystals are common. Usually in the form of crystal clusters or granular and massive aggregates.

After the quartz ore mined from the mine is processed, the product whose particle size is generally under the 120-mesh sieve is called quartz sand. The product passed through a 120-mesh sieve is called quartz powder. Quartz sand is a hard, wear-resistant, chemically stable silicate mineral. Its main mineral component is SiO2. Its color is milky white or colorless and translucent, with a hardness of 7, which is brittle without cleavage, shell-like Fracture, grease luster, density 2.65, bulk density (1-20 mesh is 1.6, 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 1750 ℃. Quartz sand is mainly used as water purification materials, glass manufacturing materials, casting additives and fluxes, ceramic blanks and glazes and refractory materials, smelting ferrosilicon, metallurgical flux, casting sand, abrasive materials (sandblasting, hard Abrasive paper, sandpaper, emery cloth, etc.), metallurgy, building materials, silicon compounds, water glass and other raw materials, amorphous silica powder, improve the wear resistance of plastics, rubber, abrasives, etc.

Quartz powder is also called silica powder. Silicon micropowder is made of natural quartz (SiO2) or fused quartz (amorphous SiO2 after high temperature melting and cooling of natural quartz) after crushing, ball milling (or vibration, jet milling), flotation, pickling purification, high-purity water treatment, etc. The micro powder processed by the technology. Silica powder is a non-toxic, odorless, non-polluting inorganic non-metallic material. Because it has excellent properties such as good temperature resistance, acid and alkali corrosion resistance, poor thermal conductivity, high insulation, low expansion, stable chemical properties, and high hardness, it is widely used in chemicals, electronics, integrated circuits (IC), electrical appliances, and plastics. , Coatings, advanced paints, rubber, national defense, etc.

Although the main components of quartz stone, quartz sand, and silica powder are the same, the main application areas of the three are still different. When using, you should choose the corresponding product according to your own needs.