Spiral gas blowing purification device for aluminum alloy smelting

Abstract

The invention discloses a spiral gas blowing purification device for aluminum alloy smelting. A gas blowing pipe is spiral. Multiple air vents are uniformly distributed in the spiral pipe. The gas blowing pipe is connected with a joint, connected to an inert gas bottle opening, of a ventilation pipe and can be fixed to a fixing frame over a crucible smelting furnace. The crucible smelting furnace is a device for smelting an aluminum alloy. A rotary valve switch is arranged on the top of an inert gas bottle. A pressure gauge displayer is arranged on the portion, close to the inert gas bottle opening, of the inert gas bottle. The gas blowing purification device for aluminum alloy smelting is simple in structure and uniform in gas blowing; and it is guaranteed that the contact area of blowing of inert gas, such as Ar or N2 or mixed inert gas and an aluminum alloy melt is increased as much as possible and the layered blowing is provided in the aluminum alloy smelting process, bubbles generated during gas blowing are diffused into the aluminum alloy melt, the small bubbles adsorb impurities and hydrogen in the melt in the upwardly-floating process and carry the impurities and hydrogen to the surface of the melt, the impurities on the surface can be scraped by a slag-off tool, hydrogen enters the air, and therefore the melt is effectively purified.

Description

technical field [0001] The invention belongs to the technical field of smelting equipment, and in particular relates to a high-efficiency smoke exhaust device for a laboratory small smelting furnace. Background technique [0002] In order to obtain good mechanical and processing properties, inert gas (such as Ar, N 2 , or mixed inert gas) small bubbles, use these small bubbles to absorb impurities and hydrogen in the melt during the floating process, and bring these impurities and hydrogen to the surface of the melt to effectively purify the melt. The traditional aluminum alloy smelting and blowing purification only uses a straight ventilation pipe with several air holes on the pipe wall. The air pressure of the formed bubbles is high, which is easy to cause the melt to tumbling. The air pressure of the air bubbles formed by blowing away from the liquid surface is small, and the movement range of the air bubbles is small, so that the melt far away from the vent pipe cannot ...

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Problems solved by technology

[0003] In order to solve the problems existing in the background technology, the present invention provides a blowing gas purification device for aluminum alloy melting. Cause the melt to tumbling, the problem of the bubble movement area is small, to ensure that the inert gas (such as Ar, N 2 , or mixed inert gas) to spray the contact area with the aluminum alloy melt and have layers, so that the bubbles formed during the blowing gas are dispersed in the aluminum alloy melt, and the small bubbles absorb impurities and hydrogen in the melt during the floating process , and bring these impurities and hydrogen to the surface of the melt, so that the melt can be effectively purified

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