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Melt filtration is the most effective and reliable way to remove non-metallic inclusions in aluminum melt. There are many kinds of filtration methods, and the most effective and most effective ones are tubular filtration and foam ceramic plate filtration. The corundum tube filter has high filtration efficiency and can effectively remove small non-metallic inclusions in […]

Generally speaking, the purification of aluminum alloy melt in furnace melt purification treatment is quite limited. To further improve the purity of the aluminum alloy melt, it is more important to rely on the on-line purification treatment outside the furnace to more effectively remove harmful gases and non-metallic slag inclusions in the aluminum alloy melt. […]

Protruding bubbles appear on the surface of aluminum products, the ones that are complete are called bubbles, and the ones that have burst are called skin. They are mostly arranged in a linear manner in the extrusion direction, which can be judged by the naked eye. It mostly appears at the beginning and end of […]

During casting, the molten metal contains a large amount of gas and solidifies, forming round holes with smooth inner surfaces, that is, pores in the ingot. The main reasons are: the raw materials used are damp, and the stove and tools are not completely dried. The smelting temperature is high, the coverage is poor, the […]

For aluminum and aluminum alloys, degassing and slagging with halogen compound flux is an important method. When using aluminium drossing flux, a large number of dispersed and fine flux droplets are formed in the melt. According to the law of dissolution equilibrium, the atomic hydrogen in the melt is brought to the liquid surface due […]

The presence of gas and non-metallic inclusions in aluminum and its alloys during the smelting process causes defects such as pores, inclusions, and loose cracks in the ingot, which affects the processing performance of the ingot and the strength, plasticity, corrosion resistance, anodic oxidation. At the same time, there are a small amount of metal […]

Gas purification is a main primary aluminum purification method. The gas used is chlorine, nitrogen or a mixture of chlorine and nitrogen. Chlorine purification. In the chlorination method, when the fluorine gas is passed into the aluminum liquid, many abnormally small bubbles are generated and mixed in the aluminum liquid. The hydrogen dissolved in the […]

The active gas used in the refining of aluminum and aluminum alloy refers to the chemical reaction with the gas in the melt, and the reaction product is a gas insoluble in the melt. At present, the commonly used active gas is chlorine. In addition to using the principle of partial pressure difference to remove […]

Pressure difference degassing refining method can be divided into gas degassing method, flux degassing method, vacuum degassing method and so on. The partial pressure difference degassing refining method places the gas-dissolved metal in a vacuum with a small hydrogen partial pressure, or introduces an inert gas into the melt to provide the driving force for […]

In order to obtain a metal melt with low gas content, on the one hand, it is necessary to carefully prepare the materials, strictly control the temperature, quickly melt, and adopt measures such as covering agents to reduce gas absorption. On the other hand, aluminum refining degassing must be carried out in the later stage […]