Magnesia chrome bricks are refractory products with magnesium oxide (MgO) chromium oxide (Cr2O3) as the main components, periclase spinel as the main mineral components. Converter magnesia-carbon bricks have high refractoriness, high-temperature strength, strong resistance to alkaline slag erosion, excellent thermal stability, certain adaptability to acid slag. The main raw materials for making magnesia-chrome bricks are sintered magnesia chromite. The purity of magnesia raw materials should be as high as possible. The chemical composition requirements of chromite ore are: Cr2O3: 30-45%, CaO: ≤1.0-1.5%.