Separation, concentration and purification process for low content aluminum-base alloy, and system thereof

Abstract

The present invention discloses a separation, concentration and purification process for a low content aluminum-base alloy, and a system thereof. The system comprises: a melting stirring furnace, a concentration and separation tube, an overflow groove, and a flow control apparatus. The process is performed according to the following steps: (1) carrying out pre-heating on the melting stirring furnace; (2) adding a low content aluminum-base alloy to the furnace; (3) melting and stirring; (4) separating, concentrating and purifying; and (5) casting the high content aluminum-base alloy. The process and the system of the present invention have advantages of short process, resource waste reducing, energy consumption reducing, low cost, high product quality, high promoting value, and the like.

Description

technical field [0001] The invention relates to a process and system for separating, concentrating and purifying aluminum-based alloys, in particular to a low-content aluminum-based alloy that can simultaneously obtain high-purity aluminum metal and high-content aluminum-based alloys by concentrating, separating and purifying low-content aluminum-based alloys. Alloy separation, concentration and purification process and system. Background technique [0002] In the national standard ("Aluminum Master Alloy Ingot" YS / T282-2000) and the American ASTM standard system (Gray Manual: "International Designation and Chemical Composition of Aluminum Master Alloy"), the requirements for aluminum-based master alloys for alloy composition adjustment The active ingredient content of the alloy is relatively high. For example, the aluminum-titanium master alloy requires a titanium content of not less than 2.5%; the aluminum-zirconium master alloy requires a zirconium content of not less tha...

AI Technical Summary

Problems solved by technology

Melting and blending is a method of preparing aluminum-based master alloys after melting pure aluminum metal and added metals in a certain proportion. Alloying elements, and in the process of doping and alloying, the secondary burning loss of aluminum and alloying metals will result in waste of resources, secondary pollution and secondary energy consumption; (2), the alloying process of the doping method will Due to the different melting points of aluminum and alloying elements, the solubility of alloying elements in aluminum is different, which is easy to form segregation of components, resulting in poor product composition uniformity; (3), the actual yield of some volatile and easy to burn alloying elements Low; (4), the whole process is complicated and the production cost is high

[0004] The thermal reduction method can produce aluminum-based master alloys with higher content, but due to high-temperature oxidation, oxidation inclusions are prone to occur, resulting in lower quality of aluminum-based alloys

[0005] The production of aluminum-based alloys by electrolysis is a relatively advanced process method, but due to the limitations of electrolytic process conditions and the concentration of aluminum-based alloys, the content of effective alloy components is low, generally 0.5%-2.0%, which cannot meet the requirements of master alloys. Composition control requirements, it is difficult to be directly used to produce aluminum-based master alloys that meet the requirements of national standards

[0006] In addition, high-purity aluminum metal for special purposes, such as aluminum metal with a purity of more than 99.9%, needs to be produced by segregation method, three-layer electrolyte method, or harsh and strict electrolysis process conditions. The process is complex and costly. high

[0007] To sum up, the existing master alloy production methods have high energy consumption, heavy pollution, large resource consumption, complicated process, high cost, and product quality that cannot meet the requirements for use.

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