Steel manufacturers of refractory materials Refractory total package a single species, generally based on refractoriness down into general refractory materials (1580 ~ 1770 ℃), primary refractory materials (1770 ~ 2000 ℃) and grade refractory materials (2000 ℃ above); according to the chemical Features into an alkaline refractory materials, refractory materials and acidic neutral refractory materials. Acidic magnesium oxide, calcium oxide as a secondary factor, is rarely used brick. Using the API silica, silica brick scrap, with its anti-corrosive power of a basic slag, high load capacity sclerosis, no volume expansion after repeated firing, as well as a slight contraction; but its acidic residue susceptible to corrosion, vibration, poor tax resistance . Secondary silica brick oven for glass melting furnaces, coke ovens and other basic thermal facilities. Alkaline silicon oxide as a secondary factor, there is rarely used brick and clay. Chromium oxide as a secondary factor of chromium slag bricks for good corrosion resistance, but poor tax resistance to vibration, low distortion measure low load. Refractory brick with clay as a secondary raw material medicine containing iron oxide, is a strong acidic refractory materials, tax resistance vibration resistance, corrosion resistance to alkaline slag have to use broad. Broadly used as a low-temperature furnace lining materials, also used alcohol, low-pressure chemical reactor lining. The total package neutral refractory steel manufacturers to iron oxide, chromium oxide or carbon as a secondary factor. Carbonaceous refractory materials with carbon bricks, graphite products and silicon carbide products, its low thermal expansion coefficient, high conductivity, and heat-up function is good, high temperature strength, resistance to acid and salt corrosion, not subject to the non-metallic and slag wetting, light. Secondary to the Martin furnace, blowing furnaces, electric, non-ferrous casting facilities, as well as some non-metallic cryogenic facilities. Containing 95% iron just above the jade products is a wider use of the excellent refractory materials. So, again for special places refractory materials. For acidic slag and iron slag has good resistance to resistance, high refractoriness than clay and brick. Tangshan Seoul Refractories Co.