In the production of refractory materials, the role of magnesium sulfate is to make magnesia refractory materials have high refractoriness, strong resistance to the erosion of alkaline slag and iron slag, and do not pollute molten steel. Therefore, the refractory materials produced by it are widely used in the steel industry.

, Magnesium sulfate is a white or colorless needle-like or oblique columnar granular crystal that does not contain any toxic impurities. When heated to 12000C, it is completely decomposed into magnesium oxide MgO and SO3. The adhesives for traditional magnesia refractories are usually silica powder, aluminate cement or polyphosphate. At high temperatures, it is easy to produce liquid phases that are unfavorable to the high temperature properties of refractory materials, and polyphosphates are prone to the problem of phosphorization of molten steel, and the use of special magnesium sulfate for refractory materials produced by North Sichuan Chemical Industry as an adhesive reduces the influence of these unfavorable factors and improves the slag resistance and fire resistance of refractory materials. .

In addition, magnesium sulfate is also used to stabilize the body during the drying and sintering of magnesium-oxygen refractory materials.