| 摘要 |
PURPOSE:To offer a magnesia.chrominum-based synthetic raw material having excellent resistance against a low basic slag by using the material consisting essentially of MgO and Cr2O3 having a specified weight ratio and keepings the total flux components of SiO2, Al2O3, Fe2O3 and CaO to a specified amount or below. CONSTITUTION:This magnesia.chromium-based synthetic raw material consists of chemical composition of 55-70wt.% MgO, and 1.6-2.8 weight ratio of MgO/Cr2 O3 and <=10wt.% total amount of the flux components SiO2, Al2O3, Fe2O3, CaO. As for the manufacturing method of this magnesia.chromium-based raw materials, the definite ratio of the magnesia raw material and one or two kinds of chromite ore or chromium oxide are mixed and the mixture is melted by the electric furnace and then cooled naturally. This magnesia.chromium-based synthetic raw material is used for the refractories in steel industry where high corrosion resistance is required. |
