Aluminium Alloys Filtration is used for the filtration of molten aluminum and non ferrous alloy.
Alumina Foundry Foam Filters mainly for filtration of aluminum and alloys in foundries and cast houses .With the excellent resistance to attack and corrosion from molten aluminum, the filter can effectively remove inclusions, reduce trapped gas.
Aluminum alloys are divided into deformed aluminum alloys and cast aluminum alloys according to their uses.
Deformed aluminum alloys include daily-used aluminum alloy doors and windows, and space shuttle body materials, which can be heat-treated and not heat-treated according to different usage requirements.
The other type is cast aluminum alloys, which mainly include aluminum-silicon alloys, aluminum-copper alloys, aluminum-magnesium alloys, aluminum-zinc alloys, and aluminum rare earth alloys.
In the actual production process, cast aluminum alloys are classified according to the content of various chemical elements.
The smelting process needs to add or reduce the amount of raw materials according to the actual chemical composition. The finished aluminum ingots supplied by some manufacturers already contain various alloy elements required by the product. The smelting process basically does not need to add other chemical elements, and does not need to be directly mixed. Smelting into aluminum liquid, there is no order of addition, this type of aluminum alloy is suitable for products with a single structure.
Aluminium Alloys Filtration
The pure aluminum ingot is used as the raw material, and the chemical composition is adjusted according to the actual production needs. The advantage is that aluminum alloy liquids of different brands can be smelted, which can meet the needs of different products, and the product types are diverse.
Before smelting the aluminum alloy, the ingredients are blended according to the requirements. According to the alloy grade, the ingredients need to consider the burning loss of the smelting process of various elements in new materials, recycled materials, and intermediate alloys.
The more economical and commonly used smelting method in aluminum alloy smelting is gas furnace melting, which requires fast melting, short time, and less air intake.
The order of feeding not only affects the melting efficiency and alloy consumption, but also directly affects the quality of the molten aluminum.
The principle of feeding is: first small and then large, easy to melt first and then hard to melt, firstly burn less, then easy to burn, and finally deteriorate.
First add small pieces of regrind, alloy additives with lower melting point (such as Al-Si alloy), then aluminum ingots and intermediate alloys with large volume and high melting point (such as Al-Mn), Mg and other elements that are easy to burn Join last.
The small pieces of regrind are first put in the bottom of the furnace to protect the furnace body and reduce the impact on the furnace wall when the large pieces of regrind are charged, and because the melting point of the regrind is low and easy to melt, the melting efficiency can be improved for subsequent melting of raw materials with higher melting points. Lower the temperature and add Mg to reduce the burning loss.
Some domestic vehicle supporting enterprises adopt this method when smelting aluminum alloys: first preheat the melting furnace, start feeding after reaching the predetermined temperature, first add small pieces to the bottom of the furnace material, and then add large aluminum ingots. After the burned elements are added, they are directly pressed into the molten aluminum to melt.
Aluminium Alloys Filtration improves the quality of aluminum wheel castings, avoids defects such as slag inclusions, air holes, and improves ductility.