High-efficiency environment-friendly additive for smelting aluminum alloy

Abstract

The invention provides am additive for smelting aluminum and aluminum alloy, which comprises metal powder and a halogen salt fluxing agent. The invention is characterized in that a small amount of sulfur powder is used as an auxiliary fluxing agent, the additive comprises the following components: approximately 70-80% of metal powder, approximately 20-30% of sylvite and 0.03-1% of sulphur powder, wherein particles of the components are 80 meshes or so, and the sum of all the components are 100%. The metal powder can be one or more out of manganese, copper, iron, nickel, titanium and the like. As potassium fluoroaluminate is used as the fluxing agent of the sylvite, thus causing no damages to the production environment and the fitness of working people, thereby achieving the goal of environmental friendliness. The use of the moderate amount of sulphur powder provides a very good bonding effect to the medal powder, thereby effectively preventing the pulverization of the metal powder, simultaneously driving the additive to ascend or descend in the melt, and reducing the descent speed. Therefore, the smelting rate is improved by more than one time, and the recovery efficiency of the metal powder reaches more than 98%.

Description

technical field [0001] The invention belongs to the technical field of production or refining of aluminum or aluminum alloy, especially the technical field of refining aluminum and aluminum alloy. Background technique [0002] In the process of aluminum and alloy smelting, it is necessary to add iron, manganese, copper, titanium and other metals to adjust the composition of aluminum alloy. In the past, the common methods of adding the above elements in the aluminum smelting pool are: [0003] (1) Directly add blunt metal blocks such as iron, manganese, copper, titanium, etc., but since the melting points of these metals are above 1000°C, it is much higher than the temperature of the aluminum melting furnace (720--760°C), The melting speed is slow at such a temperature, so high temperature operation must be adopted; [0004] (2) Add aluminum-iron, aluminum-manganese, aluminum-copper, aluminum-titanium and other intermediate alloys. The melting point of these master alloys i...

AI Technical Summary

Problems solved by technology

However, when preparing master alloys, difficulties will still be encountered due to the large difference in melting point;

[0005] (3) There is also a method for preparing master alloys from granular metals and composite salts abroad, using granular metals with a particle size of less than 400 microns and compacting them with composite salts. Pressed under pressure into a powder block weighing about 100 grams, because it is easy to absorb moisture and pulverize, it is not convenient for storage and transportation. Once moisture is absorbed, not only the metal is easy to be oxidized, but also it is not convenient to put it into the aluminum molten pool

[0006] (4) Although the existing aluminum alloy additives solve the above-mentioned problems to a certain extent, there are certain deficiencies in the actual yield of metal, melting speed, environmental protection, etc.