A kind of sodium-free refining agent for aluminum and aluminum alloy and production method thereof

A technology for sodium-free refining agent and aluminum alloy, which is applied in the field of sodium-free refining agent for aluminum and aluminum alloy smelting, can solve the problems of affecting alloy casting performance, reducing melt fluidity, worsening working conditions, etc., and reducing melt flow. performance, reducing the content of oxidized inclusions, and improving the working environment

Active Publication Date: 2011-12-21
HEBEI SITONG NEW METAL MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the defect of the prior art is: because the existing refining agents all contain more or less sodium salts, when added to the aluminum liquid, it can react with aluminum to form free sodium element and dissolve into the aluminum melt
In addition, sodium element can not only cause "sodium brittleness" in aluminum-magnesium alloys with magnesium content greater than 2%, but also reduce melt fluidity and affect the casting properties of the all...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Potassium fluoroaluminate 22%, calcium fluoride 5%, potassium carbonate 25%, potassium sulfate 25%, barium sulfate 5%, potassium chloride 15%, anhydrous aluminum chloride 3%. Strictly control the particle size of the above materials between 30-150 mesh, and the moisture content shall not exceed 0.2%. If it cannot meet the requirements, it shall be screened and dried first. Mix the above materials and put them into the screw mixer. After mixing for about 10 minutes, release about one-third of the ingredients and re-enter the mixer from the feeding port, and then mix for 10-15 minutes. The prepared refining agent is tested for particle size and water content, and packed according to the standard of 2Kg / bag or 2.5Kg / bag after passing the test.

Embodiment 2

[0019] Potassium fluoroaluminate 15%, calcium fluoride 10%, potassium carbonate 13%, potassium sulfate 18%, barium sulfate 10%, potassium chloride 30%, anhydrous aluminum chloride 4%. Strictly control the particle size of the above materials between 30-150 mesh, and the moisture content shall not exceed 0.2%. If it cannot meet the requirements, it shall be screened and dried first. Mix the above materials and put them into the screw mixer. After mixing for about 10 minutes, release about one-third of the ingredients and re-enter the mixer from the feeding port, and then mix for 10-15 minutes. The prepared refining agent is tested for particle size and water content, and packed according to the standard of 2Kg / bag or 2.5Kg / bag after passing the test.

Embodiment 3

[0021] Potassium fluoroaluminate 25%, calcium fluoride 10%, potassium carbonate 10%, potassium sulfate 18%, barium sulfate 10%, potassium chloride 22%, anhydrous aluminum chloride 5%. Strictly control the particle size of the above materials between 30-150 mesh, and the moisture content shall not exceed 0.2%. If it cannot meet the requirements, it shall be screened and dried first. Mix the above materials and put them into the screw mixer. After mixing for about 10 minutes, release about one-third of the ingredients and re-enter the mixer from the feeding port, and then mix for 10-15 minutes. The prepared refining agent is tested for particle size and water content, and packed according to the standard of 2Kg / bag or 2.5Kg / bag after passing the test.

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PUM

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Abstract

The invention discloses a sodium-free refining agent for aluminum and aluminum alloy, which consists of the following ingredients in percentage by weight: 15 to 25 percent of potassium aluminium fluoride, 5 to 15 percent of calcium fluoride, 10 to 25 percent of potassium carbonate, 10 to 25 percent of potassium sulfate, 5 to 15 percent of barium sulfate, 15 to 30 percent of potassium chloride and3 to 5 percent of anhydrous aluminium chloride. The invention also discloses a production method of the sodium-free refining agent. Because the sodium-free refining agent does not contain sodium salts, compared with sodium-containing refining agents, the sodium-free refining agent effectively solves the problem of antimony modification and phosphor modification influence caused by more or less sodium salt contained in the existing refining agent and overcomes the defects of alloy casting performance influence, melt flowability reduction and sodium brittleness possibly caused by the sodium element in aluminum-magnesium system alloy with the magnesium content being higher than 2 percent. A better use effect can be obtained in the antimony modification and phosphor modification alloys and high-magnesium-aluminum alloy. The invention belongs to the qualitative improvement on the prior art.

Description

technical field [0001] The invention relates to a sodium-free refining agent for smelting aluminum and aluminum alloys, and also relates to a production method of the refining agent. Background technique [0002] Aluminum and aluminum alloys are generally smelted under non-vacuum conditions. During this process, they easily absorb ambient gases and undergo chemical reactions to form inclusions, which greatly reduce the mechanical properties of the alloy. If the unpurified molten aluminum is directly produced into castings, the dissolved gas in the molten aluminum will float up with the decrease of solubility during the solidification process, and the oxidation inclusions in the casting will cause casting defects such as pores and cracks in the casting. Seriously affect the quality of castings, and even make the product scrapped. Therefore, it is necessary to purify aluminum and aluminum alloy melts to remove gases, metal oxides, non-metallic inclusions and other harmful ele...

Claims

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Application Information

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IPC IPC(8): C22B9/10C22B21/06C22C21/00C22C1/06
Inventor 臧立国王文红马涛范建海王会林郝丽荣陈邵龙马明明赵娜娜
Owner HEBEI SITONG NEW METAL MATERIAL CO LTD
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