Ceramic Filter Delemar Aluminium Egypt provides deep filtration to remove a large amount of impurities in molten aluminum, while the mesh profile of Ceramic Filter provides thorough, deep filtration to remove impurities in molten aluminum.
Ceramic Filter Delemar Aluminium Egypt has excellent resistance to high thermal shock, while maintaining the efficiency of removing impurities through continuous and comprehensive filtration.
Used to produce non-metallic inclusions. Among them, the metal pollution caused by oxide impurities (Al2O3) is the most serious.
Generally speaking, the total amount of oxide impurities in the alloy is 0.002% to 0.02%.
The sources of inclusions in aluminum alloy are as follows:
(1) Oxides formed by the reaction between the surface of aluminum alloy and the oxidizing gas in the furnace gas, such as Al2O3.
This oxide film can protect liquid aluminum from being oxidized.
However, once the surface film breaks, it will be wrapped in molten aluminum. Because Al2O3 has a high melting point (2050 degrees) and a higher density than molten aluminum (3.5-4.0), it will not float, so it is easy to form oxide impurities in the casting.
(2) The oxide in the charge is also an important source of oxide impurities in the alloy. For example, aluminum alloys and master alloys contain impurities such as Al2O3, and the aluminum rust Al(OH)3 on the surface of the aluminum alloy will directly contaminate molten aluminum during the smelting process.
Compared with aluminum, alloying elements such as silicon, zinc, and copper have a lower affinity for oxygen and are not easily oxidized under the protection of the oxide layer. Even if a small amount of elements are oxidized, the resulting oxide is very dense and will not damage the continuity of the aluminum oxide film. Therefore, the smelting of Si, Cu, and Zn alloys does not require the addition of coating agents.
The element that has an affinity for oxygen in aluminum alloys is magnesium. Magnesium is lighter than aluminum and oxidizes more easily than aluminum. The MgO formed after oxidation is not dense and will destroy the dense aluminum oxide layer. Because magnesium will destroy the protective effect of the aluminum oxide film, aluminum-magnesium alloys must be smelted in accordance with the flux regulations.
According to the Egyptian portal MASRAWY reported on November 14 (Sunday)
Egyptian aluminum product manufacturers stated that the decision to abolish tariffs on aluminum products is a correct decision in line with the interests of the industry and will reduce the price of finished products in the market.
Nevin Jameh, the Minister of Trade and Industry of Egypt, issued two ministerial decisions to stop imposing protective tariffs on aluminum imports.
According to a statement issued by the Ministry on Sunday (October 14), Minister Nevin Jameh suspended Resolutions No. 907 of 2019 and No. 168 of 2021. Protective measures.
Galal Abdel-Fattah, head of the Egyptian Aluminum Production Company, told Masrawy that the decision to abolish protective tariffs on aluminum imports was a very correct decision.
Jaber Al-Tohamy, owner of New Kitchen Gama, which makes aluminum appliances, agreed with him, saying that the decision was correct, especially after the sharp increase in crude oil prices during the previous period.
According to Galal Abdel-Fattah, the decision has been detrimental to aluminum manufacturers from the outset, as export fees are imposed on imported crude oil and no protective measures have been taken for finished products.
In April 2020, the Egyptian Ministry of Trade and Industry decided to impose a three-year taxation measure on imported aluminum products, including molds, cylinders and wires.
The implementation of the decision is: 16.5% of the CIF value in the first year, with a minimum of 333 US dollars per ton; 13.5% of the CIF value in the second year, with a minimum of 271 US dollars per ton; and 10.5% of the CIF value in the third year, at least US$211 per ton.
Galal Abdel-Fattah explained that not imposing fees on final products such as tableware puts pressure on manufacturers, noting that some traders have imported products from other countries at much lower prices than Egyptian products.
Galal Abdel-Fattah said that in view of the continued increase in prices, Egyptian aluminum mills will not be able to continue to engage in the industry in the next few months if fees continue to be imposed on billet products.