Preparation method of refining agent for melting aluminum alloy section doped with plant ash

A technology for aluminum alloy profiles and plant ash, which is used in the smelting of high-strength aluminum alloy profiles and the processing of aluminum alloy materials. problems, to achieve the effect of improving quality and processing performance, improving yield, and improving mechanical properties

Inactive Publication Date: 2013-05-08
邹学千
7 Cites 24 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0002] During the smelting process of aluminum alloy, covering agent, slag removing agent, slag cleaning agent, refining agent, etc. are needed, and the refining agent is added when the temperature of aluminum alloy reaches about 720 degrees. The refining agent used in the traditional aluminum alloy manufacturing process will lead to...
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Method used

Through above-mentioned refining process, obtain high-quality aluminum alloy melt, refining temperature is 710-760 ℃, and add-on is 0.5-1.5 kilogram/ton, and such aluminum alloy melt is used for casting production, obviously improves finished product The rate, especially the porosity in the casting ...
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Abstract

The invention discloses a preparation method of a refining agent for melting an aluminum alloy section doped with plant ash. The refining agent is prepared from the following materials in parts by weight of 6-8 parts of potassium chloride, 4-6 parts of wood ash coated particles, 3-5 parts of calcium fluoride, 3-5 parts of sodium nitrate, 5-8 parts of graphite powder, 8-10 parts of sodium fluorosilicate, 3-5 parts of sodium sulfate, 5-8 parts of aluminum chloride, 3-5 parts of potassium carbonate, 8-10 parts of attapulgite, 5-8 parts of NaBF4, 3-5 parts of sodium chloride, 5-8 parts of potassium sulphate, 8-10 parts of Na2TiF6, and 5-8 parts of NaF. High-quality aluminum alloy melting liquid is obtained by treatment of the refining agent. Therefore, the aluminum alloy melting liquid is used for casting production; the yield is obviously improved; especially the porosity in a cast is reduced by 1-2 degrees; effective control is carried out; an air hole is not generated at the surface of the cast; trapped oxide is obviously reduced; and oxide inclusion is at about two grades while the mechanical property of the cast is obviously improved.

Technology Topic

OxideSodium nitrate +10

Examples

  • Experimental program(1)

Example Embodiment

[0013] The present invention will be further described below in conjunction with examples, but it is not limited to the following examples.
[0014] A method for preparing a refining agent for smelting aluminum alloy profiles doped with plant ash, including the following steps: prepared from the following weight (kg) of raw materials: potassium chloride 7, plant ash 5, calcium fluoride 4, sodium nitrate 4 , Stone powder 7, sodium fluorosilicate 9, sodium sulfate 4, aluminum chloride 6, potassium carbonate 4, attapulgite 9, NaBF 4 7. Sodium chloride 4. Potassium sulfate 7. Na 2 TiF 6 9. NaF 6, mix the plant ash and attapulgite to form particles, soak the particles with 10-15% hydrochloric acid for 3-4 hours, wash with deionized water, and then soak with 10-12% sodium hydroxide solution for 3-4 After hours, wash with deionized water to neutrality, and finally dry and pulverize to obtain plant ash-coated particles. The particle size of the plant ash-coated particles is 2-3mm;
[0015] The preparation method of the refining agent is as follows:
[0016] a. Soak the above-mentioned stone powder with 10-15% sulfuric acid for 3-4 hours, wash with deionized water, then soak with 10-12% sodium hydroxide solution for 3-4 hours, and then wash with deionized water to neutrality , Then calcined at 500-530°C for 2-3 hours, and crushed into nano powder;
[0017] b. Add the above-mentioned parts by weight of potassium chloride, sodium chloride, sodium sulfate, potassium carbonate, and sodium nitrate to the water, then add 2-3% sodium lauryl sulfate and 3-5% alumina by weight of attapulgite, Stir at a high speed of 4970-5500 rpm to obtain a dispersion, which is dehydrated, dried and crushed;
[0018] c. After heating and melting other raw materials, crush them;
[0019] d. The materials obtained in steps a, b, and c are added to the plant ash coated particles and mixed and stirred to obtain a granular mixture; namely, a refining agent is obtained.
[0020] After the above-mentioned refining treatment, a high-quality aluminum alloy melt is obtained. The refining temperature is 710-760℃, and the addition amount is 0.5-1.5 kg/ton. Such aluminum alloy melt is used in casting production, which significantly improves the yield. The porosity in the casting is reduced by 1-2 degrees, which is effectively controlled, and the inclusions are also significantly reduced, and the oxidation inclusions are about level 2. The H content in the melt is generally 0.11-0.17ml/100g aluminum, and the mechanical properties of the castings are significantly improved.
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Description & Claims & Application Information

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