The Usages and Hazards of Magnesium Powder


Magnesium powder is mainly produced through the electrolysis of molten magnesium chloride and dehydro-carnallite, widely applied as reducing agent, flash powder producer, organic synthesis, illuminant, and metallurgical desulfurization and so on. Magnesium powder is mainly used in the desulfurization of steelmaking, more than 80% of magnesium demand comes from steel desulfurization, and therefore the quality of the steel industry has certain impacts on the price of magnesium.

Magnesium powder mainly falls into magnesium carbonate and atomized spherical magnesium powder. Magnesium carbonate is mainly utilized for weightlifting, gymnastics and some other sport events. Athletes apply magnesium carbonate on their body or feet so as to increase friction and improve skid resistance. Atomized spherical powder is produced after going through a variety of processing of the centrifugal atomization technology under an inert gas by putting magnesium ingot to melt at high temperature. Magnesium powder produced with this method has more active magnesium, better ball rate, larger bulk density and mobility, smaller specific area, etc. Thus can be widely utilized in national defense industry, petrochemical, aerospace, new functional materials, medicine, fireworks, food and many other high-tech research fields, with many unparalleled advantages traditional mechanical milling method don’t have.

Same as aluminum powder, magnesium powder may combust or explode spontaneously on the occurrence of moisture. If per liter of air contains 10-25mg of magnesium, it will explode in case of fire. It is rather tough to deal with fire due to magnesium. The main features of magnesium fire are fierce burning, controlling difficulties and high flame temperature, large risk of burns and dazzling glare, eyesight damaging, high risk of explosion, easy-collapsing buildings and strong smoke seriously affecting the fire-fighting operations. Once a disaster is caused by magnesium powder, the fire extinguishing agent those fire stations usually have basically is not in a position to implement its disposal.

In addition, magnesium powder can be detrimental to the human bodies to some extent as it is a powder-like object stimulating to the eyes, upper respiratory tract and skin. Inhalation can cause cough and chest pain while took orally can also be harmful. Too much inhalation of magnesium is likely to result in difficulty breathing, and ultimately death of exhaustion.