The specific gravity of artificial marble is 3.65-3.9, the melting point is 2800℃, the relative molecular weight is 40.3. According to the different production processes uses, it can be roughly divided into the following categories: Talc Factory
Calcined Magnesium Oxide
According to operating temperature: Magnesium oxide made raw material magnesite after high temperature calcination is calcined magnesia; magnesia made coke at 1400-1800°C is burnt magnesia, also called dead burnt magnesia; coal coal gas is used as fuel Magnesium oxide fired at 700-1000°C is light burned powder, also called caustic magnesium; low-grade magnesium oxide made by mixing low-grade magnesite anthracite, also called magnesia powder.
The chemical composition of magnesite is MgCO3, the relative molecular weight is 84.31, MgCO3 is the main component, SiO2, CaO, Al2O3, Fe2O3 are the secondary components, the content of MgO is usually 35%-47%. The reburned magnesia is mainly used Refractory materials are also used in the manufacture of magnesia chrome bricks calcium magnesia carbon bricks, insulating fillers for electric heating appliances, feed, building materials other fields.
Industrial Magnesium Oxide
Industrial magnesia is also called light magnesia. The bulk density is between 0.2-0.3g/ml. Magnesium oxide made MgCl·6H2O sea brine is all light magnesia is produced by the dolomite carbonization method. The magnesium oxide is also classified as light magnesium oxide.
Light magnesium oxide is an odorless, tasteless, non-toxic white amorphous powder, mainly used in the manufacture of enamel, ceramics, refractory materials, etc.; used as a filler in the production of polished adhesives paint; in man-made fibers, rubber (Fluorine rubber, chloroprene rubber) as an accelerator catalyst; in food processing as a decolorizing agent in sugar refining, ice cream powder PH regulator, etc.; in medicine as a laxative antacid for treatment Duodenal ulcer hyperacidity; in agriculture as animal feed fertilizer; in the construction industry, it can produce special magnesium-containing cement insulation boards.
In addition, it can also be used for water treatment, flue gas cleaning, has applications in cables, glass dyes, uranium processing, silicon steel industry, insulating material industry, petroleum additives, electronics industry, casting, phenolic plastics other industries.
Heavy magnesium oxide
The bulk density of the heavy magnesia obtained by further processing the light-burned magnesia separating impurities is between 0.5-0.7g/ml. Heavy magnesium oxide can replace light magnesium oxide on magnetic materials for color TV deflection coils (ferrite soft magnetic) other ferrite magnetic materials; it acts as a polishing agent in the steel ball polishing industry; the dye industry is used as the production of aminophenol Accessories; used as raw material of phenolic resin in electrical industry. Secondly, it also has applications in ceramic glass, industrial catalysts, feed, environmental protection industries.
Active Magnesium Oxide
Activated magnesium oxide is usually relative to heavy magnesium oxide, mainly using citric acid activity, oil absorption value, iodine absorption value other indicators determination of purity. Since the activity of a solid substance is proportional to the surface area, some people use the size of the surface area to express the activity. Therefore, the specific surface (surface area per unit mass of the substance), the apparent specific volume (ml/g) is the inverse of the bulk density.
Generally speaking, highly active magnesium oxide is in the form of ultra-fine powder, with a particle size of 10-100nm. Because the particle size of ultrafine particles is very small, they tend to be electric, magnetic thermal. Sound sensitivity have special properties that conventional materials do have. Therefore, activated magnesium oxide is widely used as a new material.
The activity indicated by the activity value of citric acid is 12-25, the smaller the value, the higher the activity; the specific volume is between 6-8.5ml/g; the specific surface area is between 5-20; the activity indicated by the iodine absorption value is 80-120 (mgl/100gMgO). Due to the relatively large specific surface area, it has extremely high physical adsorption capacity chemical activity, good sintering performance. It can achieve low-temperature sintering without the use of sintering aids. It is suitable for the preparation of harmful gas adsorbents, electronic components, inks, high-functional fine inorganic materials. Important raw materials.
Secondly, it can be sintered at low temperature to produce high-density crystalline ceramics multifunctional magnesium oxide films, which are expected to be developed into materials under severe conditions such as high corrosion high temperature. With high dispersibility high activity, it can even be made into fibrous magnesium oxide, which is easily compounded with polymers other materials. In addition, ultra-fine magnesium oxide can also be used as a filler for paint paper cosmetics.
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Factory Address: Yangfang Development Zone, Dashiqiao City, Liaoning Province