porous ceramic filter from AdTech Metallurgical Materials Co., Ltd has been focusing on research, development, production, and marketing of the adhesive porous ceramic filter(CFF) for aluminum alloy casting Since 2012.
The technology of AdTech
porous-ceramic-filter-product has been widely approved by the market and applied for producing multiple series of aluminum alloys products, such as PS baseboard for printing, canning materials, flexible packaging materials, railway vehicles, aerospace products, cables, electrical wires and other high-precision filtration and purification for casting aluminum alloy.
Application for porous ceramic filter
AdTech Al2O3 Foam Foundry Filter is produced based on the carrier with solid reticular structure and combined organic foam pores. The producing procedure is as below, put the carrier into the thixotropic alumina slurry, adopt square to center correcting automatic extrusion process, so that slurry evenly deposits in the foam skeleton of the carrier, after drying solidification, the carrier will turn into the final product by roasting formed under 1180 ℃ high temperature. A filter is installed in the filter bowl for filtrating impurity in molten aluminum alloy, which helps to meet the requirement of production in high value-added, high-tech performance aluminum alloy precision casting, such as computer hard drive, PS baseboard for printing, canning materials, fan blades for turbojet engine, etc.
Advantages of porous ceramic filter
Adopt the adsorption principle for the filter, can effectively remove big piece inclusions in molten aluminum, and effectively adsorb tiny inclusions.
No broken bits drop out, effectively reducing the pollution of molten aluminum.
Superior thermal shock resistance improves the erosion resistance ability of molten metal.
Automatic flow production，3 calibration procedures， and precision size fit the filter bowl tightly.
Improve the surface appearance and performance, and purify molten aluminum.
porous ceramic filter is installed and used. In general, the following aspects need to be noted
1. Use the filter plate correctly:
The size of the filter plate and the number of holes must be selected in consideration of the flow rate range of the specific casting type, the maximum liquid level of the metal during filtration, the total filtration amount, and the cleanliness of the original aluminum liquid.
2. Pre-melt filtration treatment can not be ignored:
Such as molten aluminum furnace and holding furnace normal slag, cleaning furnace; furnace refining. In particular, an in-line degassing device is still necessary because it not only reduces the hydrogen content of the melt but also removes some of the non-metallic inclusions.
3. The filter plate must be compatible with the square refractory block:
The two are adapted to seal, so as to prevent the metal from flowing into the casting box from the gap without being filtered, and also avoid the failure of the foam filter plate to float in the aluminum water due to the excessive light weight.
4. Preheat before use:
Preheat to remove moisture and facilitate initial transient filtration. Preheating can be carried out using electrical or gas heating. Under normal circumstances, it takes about 15 minutes.
5. During normal filtration, no slag is required to avoid knocking and vibrating the filter plate. At the same time, the launder should be filled with aluminum water to avoid too many worries about aluminum water.
6. After casting, drain the metal in the flow cell and filter plate. There is a vibrator abroad that is placed on the filter plate and shaken for one minute to shake off about 75% of the remaining liquid metal from the filter plate.
7. Finally clean the perimeter and remove the filter plate after solidification.
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