AdTech provides a CFF filtering device for molten metal such as molten aluminum, which enables the filter medium to be attached to and removed from it without difficulty, and provides adequate protection for the ceramic foam filter medium.
The molten metal filtering device includes a filter housing (used in the flow path of the molten metal) and a horizontal partition (installed in the filter housing and having at least one filter). The ceramic foam filter medium is arranged in the filter frame in such a way that the upper surface of the filter is horizontal. The filter medium is lower than the inflow path and overflow path of the molten metal.
In the molten aluminum filtering device, a horizontal partition plate is provided in the filter housing, the horizontal partition plate has at least one filter setting hole penetrating therethrough, and the filter frame is located therein. The filter medium is placed in an appropriate position and installed in the filter setting hole in such a way that the upper part of the filter frame protrudes from the upper surface of the horizontal partition. Therefore, the upper part of the filter frame protruding from the horizontal partition provides a convenient device for workers to replace the filter medium and the frame. Therefore, the filter medium used in the filter device can be easily replaced without being damaged. In the process of replacing the filter medium in the conventional filter device, such a disadvantage inevitably occurs that the filter medium is destroyed and the fragments of the broken filter medium are mixed into the molten metal being processed.
In addition, since the inflow path and overflow path of the molten metal are higher than the upper surface of the filter medium when kept in its working position, the filter medium is always kept immersed in the molten metal. Even in the case of operating a plurality of furnaces and frequently switching them to each other, the filtering of molten metal can be restored without wasting time by the filtering device.
As mentioned above, since the ceramic foam filter medium is constantly immersed in the molten metal, it is isolated from the surrounding air. Therefore, in the process of switching from one furnace to another, although the filter medium is always in a waiting state, the filter medium will not encounter the trouble of blockage caused by the oxide film. Therefore, by switching the flow paths of the molten metal from a plurality of smelting furnaces, it is possible to efficiently filter the molten metal using only one filtering device. Since the filter device does not need to take time to wait for the filter medium during switching from one furnace to another, this operation has improved productivity. In addition, since the operation of the filter device does not involve wasteful release of heat energy, it greatly saves energy.