MgO-CaO Bricks are made from high quality magnesite and dolomite that are processed through secondary buring(calcinations, fine grinding, briquetting dead burned). Pitch or paraffin impregnation pressed by vacuum is needed after burned under high temperature. The bricks have the features of high temperature performance and good resistance to slag and widely used in the secondary refining vessels as VOD,AOD; permanent linings or bottom of converter ,cement kiln and etc.