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Aluminum alloy shrinkage often occurs in the thick parts of castings, or at the intersection of thick and thin. Sometimes the surface of the casting is whitish, in fact, it is shrinkage. Reasons for Aluminum Alloy Defect Shrinkage Insufficient casting shrinkage during the crystallization process; The position of the introduced alloy liquid is wrong; The […]

After the adjustment of the molten metal composition is completed, the next step is the refining process of molten aluminum. The purpose of aluminum alloy refining is to obtain high cleanliness and low gas content alloy liquid after taking degassing and impurity removal measures. There are several methods for refining: Add chloride (ZnCl2, MnCl2, AlCl3, […]

In some regions, the aluminum scrap recycling process plays a very special role. These regions include Europe, North America, and Japan, where a high percentage of aluminum scrap is recovered from end-of-life products. Mature recycling areas include refineries and smelters. The refinery produces cast alloys and deoxidized aluminum, which are derived from aluminum scrap of […]

The aluminum foil is made of aluminum alloy containing 92% to 99% aluminum. The thickness of the foil is usually 0.00017 to 0.0059 inches, can produce a variety of widths and strengths, can be used in hundreds of applications. It is used to manufacture insulation materials for the construction industry, fin materials for air conditioning, […]

Known deposits of bauxite can supply the world with aluminum for hundreds of years at present production levels. When high-grade bauxite deposits are depleted, substantial reserves of secondary ores will remain to be exploited: laterite deposits in the northwestern United States and Australia, anorthosite in the western United States, apatite and alunite in Europe, kaolinite […]

Aluminum ingot smelting and casting use the Hall-Héroult process to extract aluminum metal from its oxide alumina. In this method, alumina is dissolved in cryolite in a cauldron at about 1000°C. The mixture is then electrolyzed to deposit heavier liquid aluminum on the cathode at the bottom of the pot. The aluminum can then be […]

The aluminum liquid removed from the aluminum electrolytic cell contains many impurities, which not only affects the casting and processing performance of metal aluminum, but also affects the quality of the product. In addition to the accompanying metal impurity elements accompanying aluminum precipitation during the electrolysis process, there are non-metal solid impurities (such as oxides, […]

When refining scrap aluminum, especially when the aluminum concentration is less than 50 wt%, particles of glass, oxides and stones are usually very harmful. When conventional techniques are used for this purpose, the removal of such foreign objects has caused considerable difficulties. However, before electrolytic purification, whether it is through three-layer electrolysis, bipolar electrolysis or […]

Alumina is properly called aluminum oxide, which is a chemical compound comprised of aluminum and oxygen molecules (Al2O3). After aluminum oxide refining from bauxite, alumina generally looks like a white powder similar to table salt or granular sugar. Aluminum oxide is typically referred to as alumina, but may also be called aloxide, aloxite or alundum, […]

A finer grain size promotes improved casting soundness by minimizing shrinkage, hot cracking, and hydrogen porosity. Under normal solidification conditions spanning the full range of commercial casting processes, aluminum alloys without grain refinement exhibit coarse columnar and/or coarse equiaxed structures. A fine grain structure also minimizes the effects on castability and properties associated with the […]