FRALCO DEEP BED FILTER Aluminium alloys need to meet ever more stringent quality requirements, particularly for beverage cans, foils, fine wires, lithographic sheets and bright trims. In fact, inclusions lead to problems when metal is produced to ever decreasing thicknesses approaching those of the inclusion size or when surface quality is paramount. The FRALCO Deep Bed Filter consists of an insulated box containing layers of carefully sized alumina balls through which molten aluminium flows from top to bottom. The filtering area, or bed, is sized as a function of metal flow rates Advantages Metal Quality Improvement • Inclusion removal efficiency higher than 90%. • LiMCA and PoDFA analyses show best quality requirements consistently achieved with DBF. • Different ball sizes and variable layers allow custom quality requirements. • Excellent constancy and repeatability of results Productivity Environment • Preheat station permits quick change of filter box to avoid downtime. • Large volumes can be treated before cleaning of filter boxes is required. • Flow rates of up to 90t/h can be processed. • Box design adapts to casting station layout. • Used for applications which are critical in terms of quality. Other Parts of the Equipment • Electrical holding lid: used when the box is operating to maintain the melt at the right temperature. • Preheating roof: used after bed rebuilding to prepare the box for filtering by removing its moisture content; reduces thermal shocks when put into contact with molten metal. • Dumping stand: used to get rid of the out of life media; provides seat to the box for the overhead crane to tilt it. Module cvapcity Static metal（KG） Dimension MDBF-5 8t/h 470 1823 x 1770 x 1950 mm MDBF-10 10t/h 600 2030 x 1770 x 1950 mm MDBF-15 15t/h 800 2330 x 1770 x 1950 mm MDBF-20 20t/h 1150 2440 x 2140 x 1950mm MDBF-25 20t/h 1300 2500 x 2100 x 1950mm MDBF-30 30t/h 1400 2540 x 2240 x 2000mm MDBF-35 35t/h 1680 2770 x 2400 x 2000mm MDBF-40 40t/h 1850 2870 x3000x 2000mm MDBF-55 60t/h 3030 2980 x 3200 x 2320mm MDBF-90 90t/h 4950 3000 x4100 x 2320 mm
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