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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 […]

The degassing in the furnace is mostly in the static furnace. The refining media used for degassing are: flux, carbon tetrachloride, hexachloroethane, chlorine and other mixed gases. It is a good method for semi-continuous production. However, for continuous production, refining when the charge is transferred or half-charged will easily stir up the precipitated impurities, which […]

Although the melting process of cast aluminum alloy and cast copper alloy has its own characteristics, they still have several identical or similar links. Preparation before Smelting Before the melting process of cast alloy, carefully check the smelting equipment, smelting and preheating the furnace or crucible cavity, smelting and drying and preheating the charge. According […]

In the process of heating and melting aluminum alloy, both solid and liquid metals have the ability to absorb H2, O2, N2 and other gases. This property of metal is called gettering, which is one of the important melting characteristics of metals. Practice shows that the gas existing in metal in the state of adsorption, […]

Any melt treatment filtration and degassing are complementary, slag and gas cannot be completely separated. Under normal circumstances, slag is often associated with gas. The more inclusions, the higher the gas content in the melt. At the same time, the degassing process must also remove the melt. The inclusions in the body, while removing the […]

Corundum tube filter, ceramic foam filter, and deep bed filter have three different filtration methods. Although the structure is the same, the interception and capture mechanism of impurity particles is basically the same. No matter what kind of filter, the size of the particles that can filter out impurities is much smaller than the size […]