| 20100244339 | FILTER HAVING MULTILAYERED STRUCTURE FOR FILTERING IMPURITY PARTICLES FROM MOLTEN METAL - A filter has a multi-layered structure for removing impurity particles from a molten metal. The filter includes: a plurality of filter layers sequentially disposed along the flow direction of the molten metal in a downward direction and comprising a plurality of pore channels, wherein the filter layers disposed upstream comprise larger pore channels than those of the filter layers disposed downstream. | 09-30-2010 |
