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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 […]

According to the molten Al filtration method, the molten Al is passed through a refractory ceramic foam filter to remove inclusions. Larger inclusion particles can be removed from the molten Al. However, it is difficult to remove small inclusion particles of 100 μm or smaller that account for most of the inclusions. In particular, it […]

How South Africa’s aluminum casting machine uses advanced molten metal rotary degassing rotors to reduce costs and improve metal quality. In order to protect its position in the global automotive industry, South Africa’s aluminum casters must meet or even exceed the more demanding technical specifications to obtain better quality and cleaner metals. Technologies that can […]

The presence of gas (usually hydrogen) and other particles in gravity or sand castings can cause bubbles, which can severely impair the appearance and performance (overall strength and density) of the finished product. This makes effective metal degassing critical to the quality of the casting process. Traditionally, graphite is the most widely used material for […]

In cake filtration, two situations can be distinguished. Inclusions are deposited on the upper surface of the filter. Therefore, the size of the pores of the filter must be smaller than the size of impurities, or the filter cake is precipitated during the transition process from the deep bed to the filter cake, and the […]

The molten metal cleanliness is one of the main challenges for most foundries. They must produce slabs with a sufficiently low content of hydrogen, alkali metals and inclusions to make the final product suitable for its end-use. This is especially important when rolling slabs into sheets used to make beverage cans or foils. It is […]