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    Overview of Magnesium Hydroxide Superfine Powder

    Ultrafine natural magnesium hydroxide refers to an ultrafine magnesium hydroxide prepared by calcination and hydration using natural magnesium carbonate minerals (mainly magnesite).
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    2018-12-21 09:40:13

Ultrafine natural magnesium hydroxide refers to an ultrafine magnesium hydroxide prepared by calcination and hydration using natural magnesium carbonate minerals (mainly magnesite).

Overview of Magnesium Hydroxide Superfine Powder

Magnesite (Magnesite) is a kind of natural MgCO3 mineral, often containing a small amount of impurities such as Si, Ca, Fe, Al, etc., generally white or brown, specific gravity 2.9 ~ 3.1, hardness 4 ~ 4.5, is China's dominant mineral resources, its Reserves, production and exports are both ranked first in the world. China's magnesite and its products are exported to 45 countries and regions in Asia, North America and Europe. China's magnesite has the advantages of resources, quality and scale. The total reserves of magnesite in China account for about 1/4 of the world's total, and the accumulated proven reserves are 3.1 billion tons and the reserves are 3 billion tons, ranking first in the world.

Overview of Magnesium Hydroxide Superfine Powder

Ultra-fine natural magnesium hydroxide production mechanism

Magnesite calcination

MgCO3→ MgO + CO2

When magnesite is calcined, magnesium carbonate is decomposed, carbon dioxide gas is released and magnesium oxide is formed at the same time, and calcination at different temperatures can produce magnesium oxide having significant difference in physicochemical properties.

Magnesium oxide hydration reaction

MgO + H2O → Mg(OH)2

Magnesium oxide hydration is a solid-liquid heterogeneous reaction, and the rate of hydration reaction mainly depends on the rate control step.


With the vigorous development of the national economy and the wide application of Taicheng materials, the development and application of flame retardants and flame retardant materials have received widespread attention. At present, the use of various types of flame retardants in the world is estimated to have reached 60,000 tons. In the first 10 years of the 21st century, flame retardants with anti-smoke functions such as aluminum hydroxide and magnesium hydroxide will become the main trend of development, especially the modified magnesium hydroxide, which will get faster due to good processing performance. development of.


Fiber-grade magnesium hydroxide is produced from a rare natural brucite mine, which is a non-asbestos mineral with a tensile strength of 892-l283 MPa. As a filler, the mechanical properties of the resin are significantly enhanced. Fiber-grade magnesium hydroxide ultrafine powder is a non-toxic and smoke-inhibiting inorganic flame retardant made of natural brucite by special processing. It has low corrosivity and good smoke odor. The flame retardant mechanism is endothermic decomposition, generates water, and absorbs a large amount of heat in the vaporization process, thereby suppressing the temperature rise of the combustion material, and the water vapor can dilute the combustible gas and the black smoke, so that the carbon particles are oxidized to a gas at a high temperature. To improve the flame retardancy of the material and reduce the amount of smoke. The flame retardant mechanism of the ultrafine powder is similar to that of aluminum hydroxide. The dehydration decomposition temperature is 340 ° C, which is about 100 ° C higher than that of aluminum hydroxide, and can be used for plastics at higher temperatures. Processing to further expand the application field.


Fengcheng City Heqi Brucite Mining Co., Ltd., is an imports and exports mining company registered in 1998 in Fengcheng City of Liaoning Province. the company is located in Fengcheng City, Primarily engaged in processing minerals. The company property mainly manufactures magnesium hydroxide flame retardant and brucite powder. The export work is handling by DALIAN HEXIN NEW MATERIAL TECHNOLOGY CO., LTD. 

Overview of Magnesium Hydroxide Superfine Powder


Our annual output amount is up to 100,000 tons. Quality,Integrity, Innovation are our business ideas. Relying on quality products, good services, our company possess good reputation in the line.


"Business Integrity, Standardize Services, Sustainable development, Dedicated to Community" is the company’s Principles. During several years developing, the company possesses own mines and processing plants,It consists of the heqi brucite mine in Fengcheng city (reserves 3,000,000 tons, annual output is 100,000 tons).