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Aluminum and aluminum alloy refining agent and aluminum alloy melting refining technology using same

A technology of aluminum alloy and refining agent, which is applied in the field of aluminum alloy processing, can solve the problems of environmental and employee health damage, failure to meet environmental protection requirements, unpleasant smell, etc., achieve high environmental safety, benefit employee health, and reduce dust Effect

Inactive Publication Date: 2015-10-28
浙江中金铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the above-mentioned process contains chlorine gas, the dust in the refining process is large and the smell is unpleasant. Even if the ventilation and labor protection measures are taken, it will cause harm to the environment and the health of the employees, and it will not meet the environmental protection requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Select 1235 alloy aluminum melt, in which Fe: 0.39%, Si: 0.11%, and other ≤ 0.03%, put the aluminum alloy raw material into the flame reverberatory furnace to melt into a melt, and sprinkle the refining agent when the melt temperature reaches 720°C , the amount of refining agent added is 4.5 kg / ton, and nitrogen (content higher than 99.9995%) is used for stirring and refining, stirring once every 40 minutes, 18 minutes each time; when the temperature of the molten metal reaches 740 ° C, use electromagnetic stirring for 20 minutes , and split the sampling chemical composition until the chemical composition is qualified, and prepare the guide furnace; wherein, the refining agent includes the following components and their mass percentages: K: 23%, Na: 14%, Ca: 3.0%, Al: 4.9% , F: 33%, Si: 2.7%, O: 5.0%, C: 0.4%, Cl: 14%.

[0025] 40 minutes before the lead-in furnace, use nitrogen (99.9995%) and the above-mentioned refining agent to refine the melt for 20 minutes, each fu...

Embodiment 2

[0029] Select 8011 alloy aluminum melt, in which Fe: 0.67%, Si: 0.58%, and others ≤ 0.03%, put the aluminum alloy raw material into the flame reverberatory furnace to melt into a melt, and sprinkle the refining agent when the melt temperature reaches 715°C , the amount of refining agent added is 4.5 kg / ton, and nitrogen (content higher than 99.9995%) is used for stirring and refining, stirring once every 35 minutes, 16 minutes each time; when the temperature of the molten metal reaches 745 ° C, use electromagnetic stirring for 22 minutes , and split the sampling chemical composition until the chemical composition is qualified, and prepare the guide furnace; wherein, the refining agent includes the following components and their mass percentages: K: 25%, Na: 12%, Ca: 2.5%, Al: 4.9% , F: 33%, Si: 2.6%, O: 4.5%, C: 0.5%, Cl: 15%.

[0030]40 minutes before the lead-in furnace, use nitrogen (99.9995%) and the above-mentioned refining agent to refine the melt for 18 minutes, each fu...

Embodiment 3

[0034] Select 8011 alloy aluminum melt, in which Fe: 0.67%, Si: 0.58%, and other ≤ 0.03%, put the aluminum alloy raw material into the flame reverberatory furnace to melt into a melt, and sprinkle the refining agent when the melt temperature reaches 725°C , the amount of refining agent added is 3.8 kg / ton, and nitrogen (content higher than 99.9995%) is used for stirring and refining, stirring once every 45 minutes, each 16 minutes; when the molten metal temperature reaches 735 ° C, use electromagnetic stirring for 16 minutes , and split the sampling chemical composition until the chemical composition is qualified, and prepare the guide furnace; wherein, the refining agent includes the following components and their mass percentages: K: 26%, Na: 13%, Ca: 2.5%, Al: 4.0% , F: 35%, Si: 3.0%, O: 5.0%, C: 0.5%, Cl: 11%.

[0035] 40 minutes before the lead-in furnace, use nitrogen (99.9995%) and the above-mentioned refining agent to refine the melt for 15 minutes, each furnace door i...

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Abstract

The invention relates to an aluminum and aluminum alloy refining agent and an aluminum alloy melting refining technology using the same, and belongs to the technical field of aluminum alloy machining. The refining agent comprises, by mass, 20-28% of K, 10-18% of Na, 2.3-3.0% of Ca, 3.2-5.0% of Al, 30-35% of F, 2.5-3.0% of Si, 4.0-6.0% of O, 0.3-0.8% of C and 10-16% of Cl. The aluminum and aluminum alloy refining agent contains no chlorine. Even though the aluminum and aluminum alloy refining agent contains NaCl and KCl salt, the NaCl and KCl salt do not react with Al chemically, so that production environment is innocuous, dust is greatly reduced, environmental pollution is avoided, and health of workers is facilitated. The specific refining agent is used for carrying out smelting refining on aluminum alloy to replace a refining method using chlorine. By means of the aluminum and aluminum alloy refining agent and the aluminum alloy melting refining technology using the same, aluminum alloy cast-rolling coils meeting quality requirements of aluminum foil, PS plates and CTP plates are obtained, environmental protection safety is high, and metal loss is reduced by 0.2-0.5%.

Description

technical field [0001] The invention relates to a refining agent for aluminum and aluminum alloy and an aluminum alloy smelting and refining process using the refining agent, belonging to the technical field of aluminum alloy processing. Background technique [0002] The production of aluminum and aluminum alloy single-zero foil, double-zero foil, PS plate, and CTP plate requires high-quality aluminum and aluminum alloy hot-rolled or cast billets. During the production process of the billets, the hydrogen content of the aluminum melt is required to be ≤0.12ml / 100gAl , melt filtration precision ≤ 0.5ppm, the traditional process uses: Cl 2 +N 2 and CCl 4 +N 2 (Nitrogen purity is 99.995%, bottled or self-made by nitrogen generator), the melt is refined and degassed to remove slag, so as to meet the billet quality standard. Because the above process contains chlorine, the refining process is dusty and has an unpleasant smell. Even if exhaust and labor protection measures are...

Claims

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Application Information

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IPC IPC(8): C22C1/06C22C21/00
Inventor 丁戎江蔡健伊小玉李政军
Owner 浙江中金铝业有限公司
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