Efficient magnesium-containing aluminum alloy refining and slagging dual-purpose flux and preparation method thereof

A magnesium-aluminum alloy and flux technology, which is applied in the field of alloy smelting, can solve the problems of sodium brittleness of magnesium-aluminum alloys, high dross aluminum content, poor slag-liquid separation performance, etc., so as to facilitate the slag-liquid separation and enhance the slagging effect. Effect

Active Publication Date: 2021-02-02
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually the flux composition is mainly to add a small amount of fluorine salt (such as: NaCl) on the basis of chlorine salt (such as: KCl, NaCl, accounting for about 80wt%) 3 AlF 6 , NaF, CaF 2 etc.), contains a large

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0018] In the specific implementation process, according to the weight percentage of each component, the flux composition is: 30-55% magnesium chloride + 10-45% potassium chloride + 1-5% potassium feldspar + 0-20% calcium fluoride +2~10% Potassium Fluoroaluminate. The preparation method of this flux specifically comprises the steps:

[0019] (1) Fully mix magnesium chloride, potassium chloride, potassium fluoroaluminate and calcium fluoride and other salts that have been dried at 240-300°C for 3-5 hours, melt in a resistance furnace, heat up to 650-750°C and keep warm, Stir for 10-30 minutes to obtain a uniform salt melt.

[0020] (2) Pour the salt melt into a mold to cool and solidify into a lump flux.

[0021] (3) Crushing the above-mentioned massive flux into particles with an average particle size of about 0.5 cm, and then fully mixing with dry potassium feldspar to obtain a dual-purpose flux for refining and slag-removing magnesium-containing aluminum alloys.

Embodiment 1

[0024] In this example, the high-efficiency magnesium-containing aluminum alloy refining and slagging dual-purpose flux and its preparation method are as follows:

[0025] (1) Prepare materials according to the following components by mass percentage: 48% magnesium chloride+41% potassium chloride+1% potassium feldspar+10% potassium fluoroaluminate. Among them, the particle sizes of the raw materials magnesium chloride, potassium chloride, potassium feldspar and potassium fluoroaluminate are 0.01-0.2mm, 0.15-1mm, 0.05-0.08mm and 0.04-0.07mm respectively.

[0026] (2) Dry the magnesium chloride, potassium chloride and potassium fluoroaluminate in step (1) at a constant temperature of 240° C. for 4 hours, mix thoroughly, melt and cool to room temperature in a resistance furnace, and then fully mix with dried potassium feldspar, That is, the magnesium-containing aluminum alloy refining and slagging dual-purpose flux is obtained. The resulting refining and slagging dual-purpose fl...

Embodiment 2

[0032] In this example, the high-efficiency magnesium-containing aluminum alloy refining and slagging dual-purpose flux and its preparation method are as follows:

[0033] (1) Prepare materials according to the following components by mass percentage: 35% magnesium chloride+43% potassium chloride+2% potassium feldspar+15% calcium fluoride+5% potassium fluoroaluminate. Among them, the particle sizes of the raw materials magnesium chloride, potassium chloride, potassium feldspar, potassium fluoroaluminate and calcium fluoride are 0.01-0.2mm, 0.15-1mm, 0.05-0.08mm, 0.04-0.07mm and 0.04-0.07mm respectively.

[0034] (2) Dry the magnesium chloride, potassium chloride, potassium fluoroaluminate and calcium fluoride in step (1) at a constant temperature of 300°C for 3 hours, mix thoroughly, melt and cool to room temperature in a resistance furnace, and then grow with dry potassium Thoroughly mix the magnesium and aluminum alloys to obtain the dual-purpose flux for refining and slag r...

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Abstract

The invention relates to an efficient magnesium-containing aluminum alloy refining and slagging dual-purpose flux and a preparation method thereof, and belongs to the field of alloy smelting. The fluxcomprises the following components of, in percentage by weight, 30%-55% of magnesium chloride, 10%-45% of potassium chloride, 1%-5% of potassium feldspar, 0%-20% of calcium fluoride and 2%-10% of potassium fluoroaluminate. The flux preparation process comprises the following steps of (1), fully mixing magnesium chloride, potassium chloride, potassium fluoroaluminate, calcium fluoride and other salts which are dried at 240-300 DEG C for 3-5 hours, melting in a resistance furnace, heating to 650-750 DEG C, keeping the temperature, and stirring for 10-30 minutes to obtain a uniform salt melt; (2), pouring the salt melt into a mold for cooling, and solidifying into a blocky flux; and (3), crushing the blocky flux into particles with the average particle size of about 0.5 cm, and fully mixingthe particles with dry potassium feldspar to obtain the magnesium-containing aluminum alloy melt refining and slagging flux. The magnesium-containing aluminum alloy flux does not contain sodium salt,has refining and slagging effects, and is an ideal flux for magnesium-containing aluminum alloy.

Description

technical field [0001] The invention relates to a high-efficiency magnesium-containing aluminum alloy refining and slagging dual-purpose flux and a preparation method thereof, belonging to the field of alloy smelting. Background technique [0002] During the smelting and casting process of aluminum alloy, there are obvious phenomena such as hydrogen absorption and formation of oxidized slag inclusions, which lead to a decrease in melt fluidity, formation of pores, shrinkage porosity, cracks and other defects, and lower alloy casting and mechanical properties. Therefore, improving the purity of the melt has become one of the keys to producing high-quality aluminum alloys. At present, the method of adding flux to the alloy melt is widely used in industrial production to achieve the purpose of preliminary dehydrogenation and degassing. Usually the flux composition is mainly to add a small amount of fluorine salt (such as: NaCl) on the basis of chlorine salt (such as: KCl, NaCl...

Claims

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Application Information

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IPC IPC(8): C22C1/06C22C1/02C22C21/00
CPCC22C1/026C22C1/06C22C21/00
Inventor 张丽丽赵九洲江鸿翔何杰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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