Alloy melt purifier and its method

Abstract

The invention relates to an alloy melt purifier and its method, the purifier comprises a driving motor, a connection shaft, a stator and a rotor. The driving motor is directly connected with the connection shaft, the end portion of the connection shaft enables fixed connection with the rotor, the connection shaft and the rotor are arranged in the columnar stator, the stator is embedded and fixed in an insulation container, the alloy melt is filled in the insulation container, the stator is immersed in the alloy melt, an aperture is opened on the wall at the lower part of the stator, a vapor pipe is provided at one side of the insulation container, a gas outlet of the vapor pipe is in alignment with the lower part of the lower part of the rotor; The method for purifying the alloy melt by using the purifier comprises the following steps: the alloy melt and inert gas are sucked in the purifier through the high speed rotation of the rotor, high strength shearing effect formed by the stator and the rotor can be used, and the controllable forced convection can be generated under the liquid surface of the alloy melt, thereby the introduced inert gas bubbles can be smashed to fine bubbleswhich are uniformly distributed in the melt, the fine inert gas bubbles absorb impure gas in the melt and overflow the liquid surface, so that the purification of the melt with high efficiency can berealized.

Description

technical field [0001] The invention belongs to the technical field of alloy melt treatment, and in particular relates to an alloy melt purification device and method. Background technique [0002] The purification of aluminum alloy melt is the key technology to ensure its metallurgical quality, and reducing the hydrogen content in the melt is the main purpose of aluminum melt purification. During the smelting process, aluminum alloy is very sensitive to hydrogen or water vapor, and it will inevitably absorb a certain degree of hydrogen. If the melt is cast without treatment (die casting or continuous casting), defects such as porosity and porosity will occur, and may cause hot cracking of ingots or castings, thereby increasing the scrap rate. Therefore, on the one hand, the introduction of hydrogen should be minimized during the smelting process; on the other hand, the melt should be degassed and purified before casting. Degassing treatment usually also has the effect of ...

AI Technical Summary

Problems solved by technology

However, there are some problems: polluting the environment, releasing corrosive and toxic gases when refining alloys with solvents or active gases; the size of the bubbles formed in the melt is relatively large, about 10 mm, so the degassing efficiency is low and the degassing time is long , about 10-20 minutes; the amount of inert gas used is high, even with the SNIF and ALPURUR technologies with better degassing effects, the ratio of gas consumption to metal has reached 0.67-0.84L / kg; The eddy current makes the liquid level fluctuate seriously, resulting in increased oxidation, which is not conducive to the overall uniform degassing inside the molten pool

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