The ceramic foam filter increases the flow resistance of the molten aluminum, prolongs the average residence time of the molten aluminum, and reduces the volume fraction of the dead zone of the tundish. Ceramic foam filters can significantly improve the removal rate of small-size inclusions, and can also offset part of the decrease in the removal rate of inclusions caused by increased density.<\/p>\n
During the continuous casting production process, due to the desulfurization, deoxidation, alloying of molten aluminum, the interaction between molten aluminum and slag, and the melting loss and spalling of refractory materials such as furnace linings, various oxides, nitrides, and sulfides will be produced. Non-metallic inclusions. These non-metallic inclusions seriously affect the strength, toughness, and fatigue resistance of aluminum products, and reduce product reliability.<\/p>\n
As the last place to remove inclusions before molten aluminum continuous casting, the tundish has an important impact on the cleanliness of molten aluminum. In order to improve the removal rate of inclusions, current control devices such as turbulence suppressors and weirs are generally installed in the tundish to improve the flow field and temperature distribution of the molten aluminum, thereby promoting the floating removal of inclusions. However, general flow control devices can only remove large-sized inclusions. For inclusions with a size less than 50 \u03bcm, the floating removal effect is not ideal due to the limited buoyancy.<\/p>\n