The Alu filter for casting filtration can filter out the pollution sources generated during the aluminum casting process.
On the one hand, during the smelting process, aluminum is exposed to the atmosphere in the furnace in a molten or semi-molten state. It is easily oxidized, reacts with water vapor to absorb hydrogen, and easily forms various forms of non-metallic slag (such as furnace lining fragments, flux chlorides, carbides, etc.) and coarse intermetallic particles.
These impurities usually cause bubbles and inclusions in the cast slab, which seriously affects the purity of the molten metal, thereby further affecting the processing performance, mechanical properties, corrosion resistance, and appearance quality of the product.
The alumina ceramic foam filter has a mesh structure, has a certain strength, can withstand the pressure difference of the metal liquid surface and the influence of the metal flow, but is brittle and fragile. Because this material has a precise structure, uniform quality, and large surface area, it has an excellent filtering effect.
The aluminum cast filter – ceramic foam filter has many advantages, such as good chemical stability, high specific strength, high-temperature resistance, good thermal shock resistance, and large specific surface area. It is widely used in metallurgy, chemical industry, environmental protection, and other fields.
In metallurgy, the use of ceramic foam filter plates to remove foreign impurities (such as slag and inclusions) in the lead melt is one of the most effective melt purification methods.
Studies have shown that while removing slag, the alumina ceramic foam filter can also reduce the hydrogen content in the aluminum melt. Because of its good slag removal effect, simple operation, easy matching with other parts, and low cost, it has become a conventional purification method in the aluminum processing industry. With the increasing requirements for the quality of aluminum products, the requirements for ceramic foam filters are also getting higher and higher.
Performance and Application of Alu Filter
- The Alu filter can work at a temperature of 1200 degrees Celsius.
- It is highly porous and helps to absorb molten metal, leaving behind impurities.
- It has high thermal shock resistance.
- It has high physical and chemical stability.
- Alumina ceramic foam filters can be used for non-ferrous alloys of aluminum.
