Industrial production of silicon dioxide
Quartz is the main mineral component of silicon dioxide natural mineral. Its chemical composition is SiO2. Its luster is glassy and its fracture is oily and lustrous. Shell fracture, Mohs hardness 7, density 2.65 ~ 2.66. Different colors, colorless and transparent called crystal, milky white is called milk quartz. According to its crystalline habit, the three crystal system is low temperature quartz, also called quartz; the six square system is high temperature quartz, also called quartz.
Silica, also called siliceous material, consists not only of natural minerals, but also of synthetic products, which can be classified into two categories: crystalline and amorphous forms.Silica natural minerals usually include crystalline silica minerals, quartz sand, veined quartz, powdered quartz, and amorphous silicon minerals, diatomaceous earth.The synthetic products are mainly white carbon (amorphous silica), including fumed silica (fumed silica), precipitated silica (precipitated silica).
Quartz sand is a term of mineral products, it refers to all kinds of sand quartz components accounted for absolute advantage, such as sand, river sand, Sand Lake etc.. Geology divides them into alluvial sand, alluvial sand and residual sand according to their causes. Changes of mineral content of quartz sand, quartz, feldspar and detritus, secondly contains all kinds of ore (pomegranate Zi Shi, tourmaline, pyroxene, amphibole, titanite, topaz, epidote, ilmenite) and mica, chlorite, clay minerals etc..
