METHOD FOR REMOVING FOREIGN MATTER IN MOLTEN COPPER

摘要

PURPOSE:To remove easily the foreign matter in molten copper by using 3Al2O3.2SiO3 formed by a specific method in constituted a filter to be provided in a transfer passage for the purpose of removing the foreign matter in the molten copper. CONSTITUTION:A filter 3 to be used for removing the foreign matter in molten copper is constituted of the 3Al2O3.2SiO2 formed by sintering 2MgO.Al2O3. 5SiO and Al2O3 at a high temp. The filter 3 which is connected with a refractory material 4 in the upper part thereof is fully immersed in molten copper 5 and prevents the contact of the molten copper with slag 6. The filter 3 with regulated thickness (t cm) and inter-cell spacing (e cm) expressed by the equation wherein the density of the molten copper 5 is defined as rhos g/cm<3> and the density of the foreign matter as rho g/cm<3> is used as the filter 3 for removing the foreign matter of diameter D cm or above from the inside of the copper 5 which flows at V cm/s in the transfer direction and is at 1,100-1,200 deg.C.