Flame Retardant and Polymer Material Industry

Its largest and most widely recognized application lies in the flame retardant and polymer material industry. Unlike halogen-based flame retardants that release toxic fumes when burned, magnesium hydroxide achieves flame retardation through a physical mechanism: when exposed to high temperatures above 340℃, it decomposes to release bound water, absorbing massive latent heat to lower the surface temperature of burning materials, while the generated magnesium oxide forms a dense fire-resistant protective layer to isolate oxygen and block flame spread. With RoHS compliance and full non-toxic properties, it is extensively added to PP, PE, PVC, EVA, ABS and other plastic and rubber products, serving as a core additive for low-smoke zero-halogen cable materials, conveyor belts, building fireproof panels, automotive interior parts and electronic equipment shells. Ultra-fine surface-treated magnesium hydroxide powder, with particle sizes ranging from 1250 mesh to 5000 mesh, shows excellent dispersion in polymer matrices, maintaining the original mechanical strength of materials even at high filling ratios, which has become a standard configuration for high-end flame retardant products in the European and American markets.

Environmental Protection and Water Treatment

In the environmental protection field, magnesium hydroxide powder acts as a highly efficient and safe neutralization and water treatment agent. Compared with caustic soda and lime, its mild and controllable alkalinity will not cause sharp pH fluctuations during the reaction process, effectively neutralizing acidic industrial wastewater, removing heavy metal ions such as lead, cadmium and chromium through adsorption and precipitation, and reducing COD and chroma in water. It is widely used in municipal sewage treatment, acid mine drainage remediation, industrial flue gas desulfurization and soil acid improvement projects. The most prominent advantage in this scenario is that it generates far less sludge than traditional alkaline treatment agents, greatly reducing subsequent sludge disposal costs for enterprises, which has been widely adopted by water treatment plants and chemical manufacturing enterprises around the world. As a non-hazardous alkaline raw material, its transportation and storage processes do not require special high-risk protection measures, significantly lowering the overall operational cost for users.

Other Industrial Segments

Magnesium hydroxide powder also plays an irreplaceable role in many other industrial segments. In the refractory and building material industry, it serves as a high-purity raw material for producing high-temperature resistant magnesium oxide, used in kiln lining, thermal insulation materials and ceramic additives to enhance product heat stability. In the chemical processing sector, it is a foundational raw material for manufacturing various magnesium salts, pharmaceutical intermediates and flame retardant coatings. Food and pharmaceutical grade magnesium hydroxide, with strictly controlled heavy metal impurities, can be used as an antacid for gastric discomfort relief, a magnesium nutrition supplement and a pH regulator in food processing. It is also widely applied in pulp and paper manufacturing as a filler to improve paper whiteness and strength, as well as in electrical insulation materials, glass fiber reinforced plastics and sugar refining processes.

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