FILTER DEVICE FOR REGENERATION OF METALLIC SCRAP

摘要

PURPOSE:To regenerate efficiently metallic scrap by superposing an upper vessel and lower vessel contg. respectively crucibles, supplying the metallic strip into the crucible in the upper vessel, heating the scrap to form a molten metal and filtering the molten metal into the crucible in the lower vessel via a filter. CONSTITUTION:The metallic scrap is supplied into the crucible 3 in the upper vessel 1 and while the oxidation is prevented in the atmosphere consisting of gaseous SF6 and dry air, the scrap is heated and melted by a heating coil 1A. The inside of the crucible 3 is pressurized from a gas supply path 10 for pressure filtration or the inside of the crucible 4 in the vessel 2 is evacuated through a suction path 12 for evacuation to filter the molten metal through the filter 22 into the crucible 4 when a temp. sensor 9 detects that the molten metal attains the required filtration temp. The vessel 1 is hoisted by a lifting device upon completion of the filtration. The vessel 2 is moved on rails 6 and the filter device 20 is taken out. The regeneration of Al metal and Mg metal on an industrial scale is thus made possible.