"Alkaline refractory" for new building materials

Alkaline refractories mainly refer to refractories with magnesium oxide and calcium oxide as the main components, which have strong corrosion resistance to alkaline slag. Including magnesia bricks, magnesia alumina bricks, magnesia chrome bricks, dolomite bricks, etc. (see magnesia bricks).

Commonly used is magnesia brick. Magnesium bricks containing more than 80% to 85% of magnesium oxide have good resistance to alkaline slag and iron slag, and have higher refractoriness than clay bricks and silica bricks. Mainly used in open hearth furnace, oxygen blowing converter, electric furnace, non-ferrous metal smelting equipment and some high temperature equipment.

Characteristics of basic refractories

Inorganic non-metallic materials with a refractoriness higher than 1580℃. Refractoriness refers to the Celsius temperature at which the refractory cone sample can resist the action of high temperature without softening and melting under the condition of no load. Refractory materials and high-temperature technology appeared together, roughly originating in the middle of the Bronze Age. During the Eastern Han Dynasty of China, clay refractory materials have been used as kiln materials and saggers for burning porcelain. At the beginning of the 20th century, refractory materials developed in the direction of high-purity, high-density and ultra-high temperature products. At the same time, amorphous refractory materials and refractory fibers that do not require firing and have low energy consumption appeared. In modern times, with the development of atomic energy technology, space technology, and new energy technology, refractory materials with comprehensive and excellent properties such as high temperature resistance, corrosion resistance, thermal vibration resistance, and erosion resistance have been applied.