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Flux for aluminum and aluminum alloy melt refining and preparation method of flux

An aluminum alloy melt and flux technology, which is applied in the field of refining flux with slag and sodium removal functions and its preparation, can solve the problems of unsuitable control, impurity elements in aluminum alloy melt, life-threatening and other problems, and achieves the promotion of dissolution and elimination. Effect

Inactive Publication Date: 2015-02-04
SHANDONG NANSHAN ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN102286667B discloses a sodium-free refining agent, whose components are potassium fluoroaluminate, calcium fluoride, potassium carbonate, potassium sulfate, barium sulfate, potassium chloride and anhydrous aluminum chloride, but wherein the density of barium sulfate is relatively large (4.50 g / cm3), it is not easy to float and discharge during use, barium sulfate and calcium fluoride are also easy to bring impurity elements to the aluminum alloy melt
CN102226239B discloses a refining agent whose components are NaCl, KCl, NaCl 3 AlF 6 and / or K 3 AlF 6 、Na 2 SO 4 and / or K 2 SO 4 , CaCO 3 and / or Na 2 CO 3 、REF 3 and / or RECl 3 , there are many chemical reactions between the flux and the aluminum alloy melt, which should not be controlled, and will generate polluting gas SO 2
Although chlorine and hexachloroethane have a good refining effect, they are harmful to the health of workers, equipment and the environment, and can be life-threatening in severe cases

Method used

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  • Flux for aluminum and aluminum alloy melt refining and preparation method of flux
  • Flux for aluminum and aluminum alloy melt refining and preparation method of flux

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A kind of flux used for refining aluminum and aluminum alloy melt, the mass percentage is composed of Na 3 AlF 6 1%, K 3 AlF 6 4%, MgCl 2 50%, KCl 37%, K 2 TiF 6 7%, graphite powder 1%. After preliminarily mixing the above raw materials, place them in a graphite crucible and heat up to 700°C for melting. Use tungsten tools to mechanically stir the molten flux for 10 minutes, keep it warm for 30 minutes, and perform secondary mechanical stirring for 10 minutes. The cooled and solidified bulk flux is broken and screened into 0.1-1mm particles, and finally the qualified products are dried and packaged.

Embodiment 2

[0039] A kind of flux used for refining aluminum and aluminum alloy melt, the mass percentage is composed of Na 3 AlF 6 28%, K 3 AlF 6 12%, AlF 3 46.9%, KCl 10%, K 2 TiF 6 3%, graphite powder 0.1%. After preliminarily mixing the above raw materials, place them in a graphite crucible and heat up to 900°C for melting. Use tungsten tools to mechanically stir the molten flux for 5 minutes, keep it warm for 20 minutes, and perform secondary mechanical stirring for 20 minutes. The cooled and solidified bulk flux is broken and screened into 0.1-1mm particles, and finally the qualified products are dried and packaged.

Embodiment 3

[0041] A kind of flux used for refining aluminum and aluminum alloy melt, the mass percentage is composed of Na 3 AlF 6 11%, K 3 AlF 6 18%, MgCl 2 10%, AlF 3 10%, KCl 40%, K 2 TiF 6 8%, graphite powder 3%. After preliminarily mixing the above raw materials, place them in a graphite crucible and heat up to 800°C for melting. Use tungsten tools to mechanically stir the molten flux for 20 minutes, keep it warm for 40 minutes, and perform secondary mechanical stirring for 5 minutes. The cooled and solidified bulk flux is broken and screened into 0.1-1mm particles, and finally the qualified products are dried and packaged.

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Abstract

The invention discloses flux for aluminum and aluminum alloy melt refining. The flux consists of the following components in percentage by mass: 5-40% of Na3AlF6 and K3AlF6, 20-50% of MgCl2 and / or AlF3, 10-40% of KCl, 3-8% of K2TiF6 and 0.1-3% of graphite powder, and the flux is prepared by virtue of a hybrid melting method. Na3AlF6 and K3AlF6 in the flux have effects of adsorbing and dissolving impurities of aluminum oxide, and Na3AlF6 and K3AlF6 can be matched for use to achieve relatively good effects. The flux is prepared by adopting a hybrid melting method, so that the water in the components can be completely removed, and the flux is uniform in component and stable in quality.

Description

technical field [0001] The invention relates to the technical field of aluminum and aluminum alloy melt treatment, in particular to a refining flux capable of removing slag and sodium and a preparation method thereof. Background technique [0002] When the content of slag and gas in the aluminum and aluminum alloy melt is too high, it will greatly increase the probability of metallurgical defects such as pores and inclusions in the billet, thereby reducing the strength and plasticity of the material and affecting the surface quality of the product. When the sodium content in the aluminum alloy is too high, a liquid adsorption layer is easily formed on the dendrite surface or grain boundary during thermal processing, resulting in brittle cracking of the high-magnesium aluminum alloy. Therefore, during the treatment of aluminum and aluminum alloy melts, slag, gas and alkali metals in the melt should be removed as much as possible. [0003] Currently commercially available...

Claims

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Application Information

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IPC IPC(8): C22C1/06C22B21/06C22B9/10
Inventor 罗旭东王家淳王玉林丁清伟姜魁光邵宇光
Owner SHANDONG NANSHAN ALUMINUM
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