Alkaline refractory materials mainly refer to refractory materials mainly composed of magnesium oxide and calcium oxide, which have strong corrosion resistance to alkaline slag. Including magnesium bricks, magnesium aluminum bricks, magnesium chromium bricks, dolomite bricks, etc. (see magnesium bricks).
The commonly used ones are magnesium bricks. Magnesium bricks containing over 80% to 85% magnesium oxide have good resistance to alkaline slag and iron slag, and have a higher fire resistance than clay bricks and silica bricks. Mainly used in open hearth furnaces, oxygen blowing converters, electric furnaces, non-ferrous metal smelting equipment, and some high-temperature equipment.
Characteristics of alkaline refractory materials
Inorganic non-metallic materials with a fire resistance higher than 1580 ℃. Fire resistance refers to the Celsius temperature at which a conical sample of refractory material can resist high temperature without softening and melting under no load. Refractory materials and high-temperature technology emerged together, roughly dating back to the mid Bronze Age. During the Eastern Han Dynasty in China, clay refractory materials were used as kiln materials and saggers for firing porcelain.
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