Silicon oxide (SiO2) or chemical silicon is a composite chemical that consists of 90% of solid crude ash in pure form or as a mixture of silicate minerals.Silicon is named after the word "silicis" (hard rock), rocky flint or flint. Silica is the second most abundant element in the earth's crust with a frequency of 25%.Silica is a hard ,non-ferrous collor from collorless to white or dark gray with the symbol Si, atomic number 14, atomic weight of 085/28, specific gravity of 2.33 g / cubic centimeter, hardness 7 on the mouse, white color, no clearing , Boiling point 2355 ° C, melting point 1410 ° C.Silica in group 14 (IVA) is a periodic table as non-metallo (nonmetal) and is in period 3.Silica is a major component of sandstone and silica sand, quartz and quartzite, crystalline crystalline, triplex and novacolite, synthetic silica and chemical silicon, clay minerals, granite, stones and diatomite.Silica mineral material in order to meet the industrial needs of the country should use theoretical sciences, engineering sciences and various technologies, especially processing technology.The consumption of silicon in each industry should be of a high quality. Chemical composition, mineralogical structure and physical properties of silica are determinants of quality and uses in each of these industries. The chemical composition of silica is in fact the percentage of SiO2 present in the rock, as well as the percentage of each of the other oxides that are commonly associated with SiO2 in different deposits, and if their percentage exceeds a certain amount, its application in the industries different or impossible.In addition to the SiO2 percentage, rock mineralization also plays an important role in determining the quality and uses of it, since SiO2 may be present as a variety of silicates, which will affect the determination of the mineralization method and the way to remove impurities.The physical properties of silica are also produced in the same way for grinding, granulation of silica powder, and determination of the use of powder produced.
In general, SiO2 silica use is:Glass molding, porcelain making ,ferrosilicon production, ceramics, lime sandstone, casting, sodium silicate production, production of other silica materials, as a semiconductor in the electronic industry and glass wool production.Significant amounts of crushed stones are used as building materials. Glaze:Silica is a glass-forming material for the manufacture of all types of silica glass with materials such as feldspar, nephleen sinte, soda, and so on.Ceramic:Quartz is used in the manufacture of various types of ceramics and sanitary services.Casting and refractory:The quartz resistance of Vasiliss to C 1470 makes it suitable for the casting of metals such as steel, black iron, aluminum and copper alloys, as well as refractories in the manufacture of iron and steel furnaces, ceramics, glass and cement. Other application uses such as abrasive, polished powder, filtration, sand for construction. Rounded and quality types are used to open gaps and increase permeability in oil and gas production. It can also be used as a filler in paint, plastics, rubber, putty and glue.Sodium silicate:Sodium silicate is sold as transparent, waterless and powdered glass or juice powder pellets. It is used to control the abrasion of water pipes and the formulation of glaze and enamel. Types of liquid solutions are used in soap making, industrial and general cleaners, adhesives, cementation, paint and coating, casting molding, mineral floating, peroxide stabilization and corrosion control in water pipes and silica precursors of zeolite blends.Substituted silica: The reaction of sodium silicate with sulfuric acid or chloride acid under certain conditions of sedimentation silicon is produced due to properties such as high brightness and low porosity as a fine grain and anti-slip filler in the rubber (car tires And PVC floor coverings, polyolefin, LDPE film and micro-pore separators for lead batteries, transmitters, carriers and many more.Colloidal silicon: a suspension of fine-grained silica in an aqueous medium used for friction in paper and board, fusible fiber refractories, catalysts and chemical precursors.Silica, Metallurgy Type:The quartz and coke reaction is made in an electric arc furnace and a high temperature of C'2000 and is 98% -99 %Si. It uses aluminum, steel, superalloy, silicon and chemical alloys.Other types of silica and its compounds, such as cooked silica, silica wax, silica nitrate, etc., each have its own applications.Crystalline quartz:Transparent and lovely types used to make lenses and cones, jewelry and mineral samples, use their piezoelectric properties in electronics.Trypley:Microcrystalline silica, porous with a specific gravity of 2.65, a hardness of 7, a white to gray, etc., used as filler or pigment in paint, rubber, plastic, abrasive and putty, in addition to the abrasive powder and abrasive tooth .