A kind of aluminum alloy refining device and refining method thereof

Abstract

The invention belongs to a refining device for refining purifying treatment of an aluminum alloy melt and a refining method. The aluminum alloy refining device comprises a heat preserving furnace for refining and an electromagnetic stirrer mounted at external of furnace bottom, a plurality of refining holes are formed on a side wall of the heat preserving furnace, and a plurality of refining pipes which can be slantly inserted are arranged through the refining holes; a gas outlet end of the refining pipe is installed on a guide bracket on the side wall of the heat preserving furnace, a gas inlet end of the refining pipe is fixedly connected with a drive cylinder on the guide bracket, the refining pipe is connected with a gas adjusting control cabinet through a hose, an adjusting control unit in the gas adjusting control cabinet is used for adjusting the gas input through a gas inlet pipe, and is connected with the hose through a gas outlet pipe. The device is low in manufacturing, operation and maintenance cost, and higher in security.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal smelting equipment, and relates to a refining and purification device for aluminum alloy melt, more specifically, the invention relates to a device for refining and purification treatment of aluminum alloy melt and the refining device used in the refining device. method. Background technique [0002] The non-metallic inclusions in the aluminum alloy melt are not only brought in by the raw materials, but also compounds formed by the interaction between the metal and the furnace gas or other substances during the smelting process. At the same time, aluminum alloy is gas-absorbing during heating and smelting, and will absorb H2. [0003] The existence of non-metallic inclusions such as oxides will destroy the continuity of the metal matrix, reduce the plasticity, toughness and corrosion resistance of the aluminum alloy, and make the process performance and surface quality of the metal wors...

AI Technical Summary

Problems solved by technology

[0009] The flux jet refining equipment and its method have the following defects: (1) the furnace door must be opened during refining, and the operator moves the refining tube, which is exposed to high-temperature radiation, and the working environment is harsh and labor-intensive; (2) due to the The door is open, and harmful gases such as Cl or F produced during the refining process are discharged from the furnace door, deteriorating the working environment; (3) Since the furnace door is always open during the refining process, heat will be lost, resulting in low thermal efficiency of the furnace and waste (4) Because it is manually operated, the refining device is not suitable for large furnaces, otherwise it will not only be labor-intensive, but also the refining effect will be poor

[0010] The main disadvantages of furnace bottom ventilation brick refining: (1) The ventilation brick is easy to block and difficult to maintain and replace; (2) Due to the replacement and maintenance of the ventilation brick, the wear of the surrounding refractory material will lead to premature replacement of the furnace lining material, and the furnace lining The service life is shortened; (3) Aluminum liquid may leak from the joint between the breathable brick and the furnace lining material, causing equipment accidents

[0011] The main disadvantages of top blowing refining: (1) The refiner (shaft and graphite rotor) must extend from the top of the furnace to close to the bottom of the furnace. The refining tube is too long and easy to break. It is not suitable for large furnaces; (2) Since the furnace top is the heat accumulation area of ​​the furnace, the sealing of the installation hole of the furnace top refining device is highly required, otherwise the heat is easily lost, resulting in a large temperature difference in the furnace; (3) Refining device maintenance difficult to replace

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