Electric heat pipe production commonly used types are: acid refractory steel, alkaline refractory
steel, oxide data, neutral refractory steel, refractory compound materials and high temperature
compound. Usually we call ordinary steel and specialty steel.
The use of raw materials are silica, waste silicon brick and other electric tube. Silica brick
anti-acid slag corrosion can be strong, but susceptible to alkaline slag corrosion, load softening
temperature is very high, close to its refractoriness, after repeated calcination volume is not
shortened, the larger amount of silica brick and clay brick. Silicone brick is containing more
than 93% SiO2 siliceous products. Even slightly inflated, but the thermal shock resistance is
poor. Silica brick is mainly used for coke oven, glass melting furnace, acid-making steel
furnace and other thermal equipment. Clay brick containing 30% to 46% alumina, refractory
clay as the primary raw material, refractoriness 15801770 ℃, good thermal shock resistance,
are weak acid refractory, acid slag corrosion resistance, the use of universal, the current
output The largest category of refractory steel, which belongs to ordinary steel.
To galvanite-based crystal production of electric tube. Magnesite produced by the main raw
materials magnesite, seawater magnesia extracted from the sea by the high temperature of
magnesium hydroxide calcined) and so on. Alkaline slag and iron slag has a good resistance.
Pure magnesium oxide melting point of up to 2800 ℃, represented by magnesia products. Containing
80% or more of magnesium oxide. Thus, the fire resistance of the magnesia brick is higher than
that of the clay brick and the silica brick. Since the mid-20th century, since the mid-50s,
because of the use of oxygen blowing converter steel and the use of alkaline furnace furnace
top, alkaline refractory production gradually added, clay brick and silicate brick production
is cut. Alkaline refractories are mainly used for oxygen blowing converter, flat furnace,
electric furnace, nonferrous metal smelting and some heat treatment equipment.
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