Among many flame retardants, magnesium hydroxide is undoubtedly one of the better ones. When heated, it will decompose and release bound water to absorb a large amount of latent heat, reducing the surface temperature of the filled synthetic material in the flame. And more importantly, magnesium hydroxide can also suppress smoke. Once magnesium hydroxide flame retardant is added, the smoke density during combustion can be greatly reduced, reducing the risk of people being choked. In recent years, due to environmental protection policies and changes in people’s consumption concepts, the demand for magnesium hydroxide in thermal conductive plastics, insulating materials, wires and cables, coatings and other fields has been growing.
Since my country has abundant magnesium resources and unique resource advantages, the raw materials used to extract magnesium hydroxide are currently mainly salt lake brine method, most of which are concentrated in Qinghai. Due to the simple acquisition of raw materials, the local brine-ammonia method is mostly used. The brine that has been purified to remove sulfate, carbon dioxide, a small amount of boron and other impurities is used as the raw material, and ammonia is used as a precipitant in the reactor for precipitation reaction. A certain amount of seed crystals are added before the reaction and fully stirred. After the reaction is finished, a flocculant is added, and the precipitate is filtered, washed, dried, and crushed to obtain the finished magnesium hydroxide product.
Since this process is relatively simple, it is easy to cause uneven particle size distribution of magnesium hydroxide products. But surprisingly, the magnesium hydroxide products of Hebei Messi Biology Co., Ltd. can perfectly avoid this. When asked about the reason, it turns out that in addition to using internationally advanced production technology and imported equipment, Messi Biological will also improve the equipment accordingly to address the many defects of traditional processes, develop a unique technical formula, and cooperate with strict management systems and perfect testing instruments. It not only breaks through the singleness of chemical and ore-based magnesium hydroxide, but also has the advantages of high purity and high cost performance. At the same time, the entire production process is almost zero-emission, which meets the requirements of green environmental protection development.