Many industrial buyers only regard magnesium hydroxide as a simple flame retardant powder, but in fact, it is a multi-functional inorganic mineral material integrating flame retardancy, smoke suppression, acid neutralization, adsorption and filling reinforcement. With stable chemical properties, weak alkalinity, low hardness and good dispersion performance, magnesium hydroxide can perfectly match polymer modification, environmental protection treatment and industrial manufacturing scenarios. It has become an indispensable basic raw material in modern green manufacturing industry.
According to different production processes, magnesium hydroxide is divided into natural brucite type and synthetic type. Natural magnesium hydroxide has high cost performance and stable quality, suitable for large-scale industrial flame retardant filling; synthetic magnesium hydroxide has higher purity, fewer impurities and whiter color, which is more suitable for high-end environmental treatment and high-precision material modification.
In the global halogen-free flame retardant market, magnesium hydroxide and aluminum hydroxide are the two most mainstream inorganic flame retardants. However, magnesium hydroxide has obvious comprehensive advantages. Its higher decomposition temperature makes it more suitable for high-temperature processing materials that aluminum hydroxide cannot support. Its compact combustion carbon layer brings better anti-aging and anti-flaming durability. In long-term outdoor environment and high-temperature working conditions, magnesium hydroxide modified products show more stable performance and longer service life.
In addition, after surface activation treatment, magnesium hydroxide powder has excellent compatibility with plastic and rubber resin systems. It can be highly filled without causing obvious deterioration of mechanical properties, which greatly improves the flame retardant grade of finished products and realizes high-efficiency and low-cost material upgrading.
As a weak alkaline inorganic powder, magnesium hydroxide is an efficient and safe acidic wastewater neutralizer. Compared with strong alkali materials such as caustic soda, its neutralization reaction is mild and stable, and the pH value is easy to control without excessive adjustment. At the same time, its unique flocculation and adsorption performance can effectively capture and precipitate heavy metal ions such as chromium, lead, nickel and copper in wastewater, achieving dual effects of acid removal and heavy metal purification.
Magnesium hydroxide slurry is widely used in flue gas desulfurization of power plants, garbage incineration plants and industrial boilers. It can efficiently react with sulfur dioxide and other harmful gases in flue gas, with high desulfurization efficiency and stable reaction. The final by-products are harmless and easy to recycle, which meets the requirements of modern industrial clean production.
For flame retardant plastic, rubber and cable industries, surface-activated modified magnesium hydroxide is the best choice, which ensures good dispersion and material toughness. For wastewater treatment and desulfurization industries,non-activated ordinary magnesium hydroxide is more cost-effective. Different mesh sizes from 325 mesh to 5000 mesh can be customized according to customer’s formula viscosity, filling ratio and product performance requirements.
With the continuous improvement of global environmental protection standards and fire safety regulations, the market demand for low-smoke, halogen-free and non-toxic flame retardant materials is growing rapidly. Magnesium hydroxide, as a mature and eco-friendly functional mineral powder, will continue to replace traditional harmful flame retardants and become the core raw material of new energy, building fire protection, industrial environmental protection and high-end polymer materials in the future.
