A method and device for preparing foamed aluminum from semi-solid slurry based on the blowing method

Abstract

A method and device for preparing aluminum foam from a semi-solid slurry based on the blowing method. The method is: (1) adopting a near-liquidus method to prepare an aluminum alloy semi-solid slurry; (2) continuously transporting it into a crucible, and The coil is heated and kept warm; the partition divides the crucible into a liquid storage chamber and a foaming chamber, and a stirring paddle is set in the foaming chamber and a liquid-permeable hole is arranged at the bottom; (3) Stirring is carried out by the stirring paddle, and air is sprayed into the liquid-permeable hole, Foam is formed in the aluminum alloy semi-solid slurry; (4) The foam floats up to the outside of the crucible and collapses, gradually solidifies and is transported out by the traction wheel. The device includes a crucible and a partition inside, and there is a gap edge between the bottom edge of the partition and the inner bottom of the crucible; a stirring paddle is arranged in the foaming chamber, and a liquid-permeable hole is arranged at the bottom; the bottom blowing nozzle communicates with the liquid-permeable hole. The method and device of the invention avoid the separation step of the ceramic particles and the aluminum alloy material, and avoid the separation step of the ceramic particles and the aluminum alloy material in the recovery process, thereby reducing costs.

Description

technical field

[0001] The technical field of the term porous foam material of the present invention, in particular relates to a method and device for preparing foamed aluminum from a semi-solid slurry based on an air blowing method. Background technique

[0002] As a new type of material with both gas and liquid media, aluminum foam has excellent properties such as light weight, heat insulation, and high electromagnetic shielding. It is widely used in construction, aerospace and other industries; in order to meet the application needs of various industries, foam The efficient preparation of aluminum has become a research focus in the field of metallurgy.

[0003] At present, there are mainly two methods for preparing foamed aluminum in the industry for different needs, direct blowing method and melt foaming method; wherein the direct blowing method refers to the method of introducing gas into the metal melt to produce foam materials, and the other The advantage is that the...

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