Preparation of magnesium oxide by thermal decomposition


Thermal solution uses high temperature to decompose magnesium carbonate into magnesium oxide and carbon dioxide.


Material selection: Lightweight magnesium carbonate with high purity and uniform granularity is used as raw materials.

Preparatory processing: Magnal carbonate is grinded into fine powder to improve the reaction activity.

Thermal solution process: Lightweight carbonate powder is placed in a high temperature furnace, and insulated for a period of time at 900 1100 ° C for a period of time to break down magnesium carbonate into magnesium oxide and carbon dioxide.

Cooling: After the thermal solution is over, the stove is naturally cooled, and the powder after the heat solution is removed, that is, light magnesium oxide powder.


Temperature: Too low temperature will cause incomplete response, and too high will cause magnesium oxide sintering.

Insulation time: Insufficient thermal insulation time can lead to insufficient response, and too long will cause magnesium oxide sintering.

Raw material particle size: granularity is too much to reduce the reaction activity, and it is prone to reunion.

Atmosphere: The control of the atmosphere during thermal solution is inert gas (such as nitrogen or salamander) to prevent magnesium oxygen reactions from the oxygen in the air.


The light magnesium oxide prepared by thermal solution has the following characteristics:

Light proportion: Due to the low solid volume density of magnesium oxide, the proportion of light magnesium oxide is also light.

High pore rate: The thermal solution process will generate a large amount of gas, forming a rich pore structure in magnesium oxide, which improves its surface area and adsorption ability.

Light Burned Magnesium Oxide

Chemical stability: Magnesium oxide has good high temperature resistance, corrosion resistance and acid alkali.


Lightweight magnesium oxide is widely used in the following fields:

Refractory Material

Refractory Material: Make high temperature, lining and refractory coating.

Adsorption agent: heavy metal ions, organic matter and phosphate in the wastewater.

Catalyst: Used in the fields of petrochemical, fine chemical synthesis and environmental protection.

Functional materials: Preparation of heat insulation materials, insulation materials and lightweight composite materials.

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