Why is dead-burned magnesium powder so refractory?

The dead-burned magnesia powder is made of natural magnesite ore and calcined in a high-temperature shaft kiln. It is a raw material for making bricks and producing unshaped refractories, and the finished products are used for steelmaking, electric furnace bottoms and ramming furnace linings. Lightly burnt powder

The dead-burned magnesium powder is mainly made of magnesite ore with a content of more than 46%. The magnesite ore is calcined in a high-temperature shaft kiln and heated to 1400-1800 ° C. When the Mg(CO3) is completely decomposed, periclase is formed, and it becomes a hard red-brown heavy-fired Magnesium, which has high refractoriness. It is an ideal raw material for the production of unshaped refractory materials, and the products are used in steelmaking open hearths, electric furnace bottoms and ramming furnace linings.

The dead-burned magnesium powder factory said the role of sewage treatment in magnesium oxide. Magnesium oxide can react with sewage to generate magnesium hydroxide. The powdered magnesium oxide reacts with sewage to first generate magnesium hydroxide, and magnesium oxide reacts with sewage to form magnesium hydroxide. At the same time of magnesium hydroxide, the harmful impurities in the sewage are reacted and treated. The purpose of magnesium hydroxide is that it can be used as a neutralizing agent. Magnesium hydroxide is alkaline and has good adsorption performance. It can be used as acid-containing waste gas, wastewater treatment, Neutralizers containing heavy metals and organic waste liquid treatment have been widely used in water treatment systems in recent years.

When magnesite is calcined at 1800 °C, carbon dioxide completely escapes, and magnesium oxide forms a dense block of periclase, called dead-burned magnesium (also known as sintered magnesium powder). This dead-burned magnesium has high refractoriness. Its main component is magnesium oxide, which is made of natural super-grade magnesite ore through flotation purification, light burning, fine grinding, high pressure briquetting, and ultra-high temperature oil shaft kiln calcination.