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Aluminium cleaning technique for production of super-thin aluminium foil by cast-rolling stock

A technology of ultra-thin aluminum foil and blanks, which is applied in the field of aluminum foil production, can solve the problems of undiscovered public reports, avoid pollution and damage to human health, and improve the effect of cleanliness

Active Publication Date: 2007-09-19
YUNNAN HAOXIN ALUMINUM FOIL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Through document search, do not find the public report identical with the content of the present invention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The process of liquid aluminum cleaning technology is as follows:

[0026] 1. Pass 99.99% high-purity N into the melting furnace through the traditional pulse method through the three breathable bricks installed at the bottom of the melting furnace 2 , that is: after passing nitrogen for 10 seconds, when the amount of nitrogen passing reaches 50 liters, stop nitrogen passing for 40 seconds, so that the high-purity N in the molten aluminum is injected intermittently on the line 2 .

[0027] Continuous bottom blowing of high-purity N through the bottom of the smelting furnace 2 , promote the three-dimensional convective mass transfer of molten aluminum in the furnace, and carry out regular, orderly convective and turbulent stirring. 2 It always moves upward from the bottom of the furnace, and the large inclusions in the bottom of the furnace and the molten aluminum are taken out of the surface of the molten aluminum, so as to achieve the purpose of cleaning the molten a...

Embodiment 2

[0033] Basically with embodiment 1. The difference is: after 30 seconds of feeding nitrogen into the bottom of the smelting furnace, when the amount of nitrogen feeding reaches 180 liters, stop nitrogen feeding for 70 seconds; after feeding nitrogen into the bottom of the holding furnace for 30 seconds, feed nitrogen When the volume reaches 45 liters, the nitrogen flow is stopped for 250 seconds.

Embodiment 3

[0035] Basically with embodiment 1. The difference is: after 60 seconds of feeding nitrogen into the bottom of the melting furnace, when the amount of nitrogen feeding reaches 320 liters, stop nitrogen feeding for 100 seconds; after 60 seconds of feeding nitrogen into the bottom of the holding furnace, feed nitrogen When the volume reaches 80 liters, the nitrogen flow is stopped for 300 seconds.

[0036] The inventor used this cleaning technology to treat the aluminum liquid in the process of producing thousands of tons of ultra-thin aluminum foil, and the effects all met the design requirements.

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Abstract

This invention relates to a cleaning technique of aluminium liquid in producing ultrathin aluminum foil with casting blank, belonging to the field of producing. This technique includes the procedure of blowing continuously high-purity N2 at the furnace bottom of smelter and holding furnace, and the procedure of storage in smelter when aluminium liquid is removed from smelter to holding furnace.a: blowing continuously nitrogen at the smelter bottom for 10-60s, and stopping to blow nitrogen for 40-100s when the quantity of nitrogen has reached to 50-320 litres; b, blowing continuously nitrogen at the holding furnace bottom for 10-60s, and stopping to blow nitrogen for 200-300s when the quantity of nitrogen has reached to 10-80 litres; the two furnaces bottom are all the same, injecting periodically high-purity N2 into molten aluminium liquid on line; c, adding the procedure of storage in smelter when aluminium liquid is removed from a smelter to a holding furnace, making aluminium liquid staying in smelter for at least 30 minutes and cleaning it again, then removing it to the holding furnace. This invention is of no environmental pollution and no harm to humans' body, and improvs the cleaning degree of aluminium liquid, with the hydrogen content of it <=0.12ml / 100gAl. It specially adapts to produce 0.005mm aluminum foil.

Description

Technical field: [0001] The invention relates to a liquid aluminum cleaning technology in the process of producing ultra-thin aluminum foil with casting and rolling blanks, which is especially suitable for producing aluminum foil with a thickness of 0.005 mm, and belongs to the technical field of aluminum foil production. Background technique: [0002] As we all know, in the aluminum foil processing industry, the processing of ultra-thin aluminum foil is very difficult. However, it is more difficult to produce ultra-thin aluminum foil with cast-rolled blanks, which requires very strict internal quality of cast-rolled blanks. Therefore, it is necessary to effectively clean the molten aluminum during the casting process to ensure the quality of ultra-thin aluminum foil. [0003] In the molten aluminum, the impurities in the liquid aluminum act as the carrier of hydrogen, coexist with hydrogen and coexist in the aluminum liquid. Various impurities that inevitably exist in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B21/06C22B9/05
Inventor 高瑾肖刚马宁周卓高珺何惠刚高保岗赵志坚任小利曹波
Owner YUNNAN HAOXIN ALUMINUM FOIL