Fused magnesia important raw materials castable Refractory Materials Iron and steel smelting
Magnesium oxide is an inorganic substance with the chemical formula MgO. It is an oxide of magnesium and an ionic compound. It is a white solid at room temperature. Magnesia exists in nature in the form of periclase and is the raw material for magnesium smelting.
Magnesium oxide has high fire resistance and insulation performance. After high temperature burning above 1000 ℃, it can be transformed into crystal. When it rises to 1500 - 2000 ° C, it will become dead burned magnesium oxide (magnesia) or sintered magnesium oxide.
It is divided into light magnesium oxide and heavy magnesium oxide. Light weight, loose volume, white amorphous powder. Odorless, tasteless and non-toxic. Density 3.58g/cm3. It is insoluble in pure water and organic solvents, and its solubility in water increases due to the presence of carbon dioxide. Soluble in acid and ammonium salt solution. It is transformed into crystal by high temperature burning. Magnesium carbonate double salt is formed in the presence of carbon dioxide in the air. Heavy, compact in volume, white or beige powder. It is easy to combine with water and absorb water and carbon dioxide when exposed in the air. It is easy to gel and harden when mixed with magnesium chloride solution.