Bentonite is a non-metallic mineral It is a major component of montmorillonite, bentonite their own province has a very good physical and chemical properties, has been "universal soil" of the title, and now in all areas are in the use of bentonite , The application is very extensive, bentonite can be used as a binder can be used as binder, suspending agent, thixotropic agent, stabilizer, decolorizing agent, fillers, feed, catalyst and other materials, and because of its own unique Chemical properties in the oil extraction, directed through, steel casting, metallurgical pellets, chemical coatings, compound fertilizer, sizing, rubber, plastics, paper, water purification, moisture absorption, pesticides and other fields have also been favored by many industries. Bentonite now has its own place in all areas. Mainly due to its own characteristics. Bentonite used in casting is mainly used in clay sand, because bentonite has strong bonding strength, high plasticity, good film release, excellent air permeability, high temperature and humidity conditions, physical and chemical properties and other characteristics.
Clay clay sand for modeling materials to produce castings, this is a long history of the process, in a variety of chemical bonding sand vigorous development today, clay wet sand is still the most important modeling materials, its wide range of applications, consumption Large, is any other modeling materials can not be compared with. Modern high-pressure modeling, injection molding, gas Chong modeling, static pressure modeling and non-shock vacuum pressure molding and other new technology, are also based on the use of clay wet sand as the premise, clay wet sand to adapt to the molding conditions of the strong ability The Bentonite is a clay rock, also known as montmorillonite clay rock, often containing a small amount of illite, kaolinite, erolite, chlorite, zeolite, quartz, feldspar, calcite, etc .; generally white, Due to changes in iron content was light gray, light green, pink, brown red, brick red, gray and black; with waxy, soil or oil luster; bentonite loose loose soil, and some dense hard.
The main chemical components are silica, aluminum oxide and water, also contains iron, magnesium, calcium, sodium, potassium and other elements, Na2O and CaO content of bentonite physical and chemical properties and process technology performance considerable. Montmorillonite mineral is monoclinic, usually soil-like block, white, sometimes with light red, light green, light yellow and other colors. Shiny dim. Hardness 1 ~ 2, density 2 ~ 3g / cm3. Organic bentonite is an inorganic mineral / organic ammonium complex, using bentonite as raw material, the use of bentonite montmorillonite lamellar structure and its ability to swell in water or organic solvent dispersed into colloidal grade clay particles by ion exchange Technology to insert organic covering agent made of. Organic bentonite can form gel in various organic solvents, oils and liquid resins. It has good thickening, thixotropy, suspension stability, high temperature stability, lubricity, film forming, water resistance and chemical stability , In the paint industry has important application value.