Industrial application of brucite

Brucite is mainly used in the following industrial fields:


Extraction of Mg and MgO raw materials: Mg and MgO are extracted from brucite, which has high MgO content and less impurities; Low decomposition temperature; The volatiles produced during heating are non-toxic and harmless, so products such as Mg and MgO can be extracted from brucite.


Re fired magnesia: mainly used to produce magnesia refractories. Modern iron and steel industry needs a lot of magnesia carbon bricks, magnesia chrome bricks and so on. The amount of this kind of MgO has exceeded 1 / 2 of its output. The calcined magnesia prepared from brucite has the advantages of high density (> 3.55 g / cm3), high fire resistance (> 2800 ℃), high chemical inertia and high thermal shock stability.


Light magnesium oxide: the United States, Russia, Canada, Britain and other countries use chemical methods to extract light MgO from low-grade brucite rock.


Fused periclase: it is a special pure product required by high-tech electronic products. Periclase aggregate made from brucite by electrofusion method has high thermal conductivity and good electrical insulation, and the service life of the product is increased by 2 ~ 3 times.


Chemical pure magnesium reagent: metal magnesium can be extracted by electrothermal method to prepare MgCl2, MgSO4, Mg (NO3) 2 and other chemical pure reagents.


Reinforcing material: wollastonite can be used as a substitute for chrysotile asbestos in some fields. It is used in medium-grade thermal insulation materials such as microporous calcium silicate and calcium silicate board. The basic formula is: diatom earth rock mortar, water glass fiber brucite. The fiber content is 8 ~ 10%. The product has high whiteness, beautiful appearance and low bulk density.


Flame retardant: the test of flame retardant based on polypropylene shows that brucite has good flame retardant effect and is an ideal non-toxic, smokeless, pollution-free and high-temperature flame retardant. At the same time, it can enhance the effect of filler.


Papermaking filler: brucite has high whiteness, good peeling property, strong adhesion and poor water absorption. Using it with calcite as papermaking filler can change the papermaking process from acid method to alkali method and reduce the pollution of pulp water.


Handicrafts: the dense block of brucite has rich and changeable colors, uniform texture, good transparency, fine and smooth; It often forms natural stripes and natural patterns with other minerals or varieties, which has ornamental value. Therefore, it can be carved into handicrafts.