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The degassing of aluminum alloy casting is very important for obtaining high-quality aluminum products. After the homogenization heat treatment of the aluminum alloy ingot, blister surface bubbles are sometimes formed on the surface. The surface of the aluminum alloy casting appears as scattered protrusions, and the protrusions are cavities. Through magnification, the inner wall of […]

Metals degassing is used to treat molten metal to effectively remove undesirable inclusions such as gases, alkali metals, and entrained solids. When many molten metals are used in casting and similar processes, they must be initially treated to remove harmful components that may adversely affect the physical or chemical properties of the resulting cast product. […]

On-line molten metal degassing is usually accomplished by blowing an inert gas containing a certain percentage of chlorine (Cl2) gas. Chlorine forms small bubbles in molten metal. Degassing is usually carried out in a continuous operation before casting, which itself can be carried out continuously. A mixture of inert gas and Cl2 (chlorine) is injected […]

The filtration ability of the filter to remove inclusions from molten aluminum mainly depends on the roughness of the openings formed in the aggregated mesh member and the configuration of the mesh member. Therefore, particularly in order to remove fine inclusion particles of about 10 to 25 μm, the aggregated mesh member needs to have […]

According to the molten aluminum filtration method, the molten aluminum is passed through a ceramic foam filter to remove inclusions therein. The ceramic foam filter used to melt Al can remove fine inclusion particles of about 10 to 25 μm, which account for most of the inclusions, thereby obtaining high-quality aluminum alloy. At the same […]

In the metals and alloys obtained by melting, due to the selection of materials used, in addition to the necessary metal components, harmful or unnecessary metals and non-metal components are usually contained. As we all know, the impurities contained in molten metal, such as sulfur, oxygen, hydrogen, nitrogen, etc., will greatly affect the quality of […]

The high-efficiency ceramic foam material for filtering molten aluminum has an open-cell structure with a plurality of interconnected voids surrounded by a mesh of ceramic material. The air permeability of the filter is 400 to 8000×10-7 cm2. In addition, the filter has a porosity or porosity of 0.80 to 0.95, characterized by 5 to 45 […]

One way to remove gases and impurities from molten metal is through degassing treatment. The physical process involves injecting flux gas into the melt. Hydrogen enters the purged bubble by diffusing through the melt and entering the bubble. In the bubble, the hydrogen adheres to the surface of the bubble and is adsorbed into the […]

The ceramic foam filter plate is a disposable item, and it is necessary to provide an effective means to seal the filter plate in its proper position in the holder, so as to be easy to assemble, disassemble and clean. The filter chamber itself is usually an integral part of the tank, dumping tray or […]

One or more grain refiners will be included in the aluminum alloy composition. Grain refiners are well-known pre-alloyed materials, usually in the form of solid rods or wires, which are continuously added to the casting stream or aluminum alloy melt to obtain the desired fine grain size during solidification. Reagents that promote grain refinement of […]