Rective magnesium oxide, also known as light-burned magnesia or caustic magnesia, is magnesia formed by calcining magnesium compounds below 900°C. The chemical activity of magnesia can be expressed by iodine absorption value (adsorption performance index). The higher the iodine value, the lighter it is. When the iodine absorption value is 120-180mg/g, it is called high-activity magnesia; when the iodine absorption value is 50-80mg/g, it is called medium-active magnesia; when the iodine absorption value is 19-43mg/g, it is called low-activity magnesia. magnesium.
Reactive magnesium oxide is generally relative to heavy magnesia. Since the activity of solid matter is proportional to its surface area, some people use the size of its surface area to express activity, so the specific surface (surface area per unit mass of material) is introduced The specific volume (ml/g) is the reciprocal of the bulk density.
Generally speaking, high-activity magnesium oxide is in the form of ultrafine powder, which refers to particles with a particle size of 10-1000nm. Due to the extremely small particle size of ultrafine particles, they are often in the field of magnetism, electricity, sound, heat and sensitivity. It shows special properties that conventional materials do not have, so it is widely used as a new type of material. The activity expressed by citric acid activity value is 12-25. The smaller the value is, the higher the activity is, expressed by iodine absorption value. The activity is 80-120 (mgI/100gMgO), the specific surface area is between 5-20, and the apparent specific volume is between 6-8.5ml/g. Due to its large specific surface area, it has extremely high chemical activity and physical adsorption capacity , has good sintering performance, does not need to use sintering aids to achieve low-temperature sintering, and is a high-function fine inorganic material.
With the development of science and technology and the national economy, the application of reactive magnesium oxide will become more and more extensive, and the demand will further increase. High-activity light magnesium oxide is made of soluble magnesium salt and dolomite, and is finely processed. The product has fine particle size, good dispersion compatibility and high iodine absorption value. High activity, stable quality and good performance. Widely used in neoprene, fluorine rubber, butyl rubber, chlorinated polyethylene (CPE), polyvinyl chloride (PVC) plastics and adhesives, advanced inks, paints, etc. Used in rubber sheathed cables, mining cables, marine cables and other industries, it can improve the performance of cables such as anti-corrosion, acid resistance and high temperature resistance, and improve the working stability under harsh conditions.
Rective magnesia can also be used as an adsorbent for removing fluorine in water. At present, there are water quality problems in rural drinking water such as high fluorine, high arsenic, bitter salt, untreated surface water of class IV and super class IV, especially if the fluorine in the water exceeds the standard, which will seriously damage the Cause fluorosis, a great hazard to people’s health. Utilizing the adsorption of reactive magnesium oxide, it can advantageously remove fluorine in water and solve the problem of water safety.
