Grain control method for production of ultrawide double-zero aluminum foil blanks by electrolytic aluminum liquid cast-rolling process

Abstract

The invention relates to a grain control method for production of ultrawide double-zero aluminum foil blanks by electrolytic aluminum liquid cast-rolling process. A smelting furnace holding solid aluminum and electrolytic aluminum liquid in a horizontal aluminum cast-rolling line is used for smelting for 4-10 hours at the low temperature of 720-735 DEG C, the aluminum liquid is heated to 740-750 DEG C in 20-30 minutes, the aluminum liquid is refined after alloy preparation, the aluminum liquid is allowed to stand for 30-50 minutes after refining and is transferred to a standing furnace, the aluminum liquid in the standing furnace is evenly mixed for 10 minutes every 4-6 hours by Ar and CCl4, the aluminum liquid in the standing furnace flows into a filter tank through a degassing tank and a channel and flows to a front tank through the filter tank and the channel, and the aluminum liquid is injected into gaps of casting rollers by a casting spile. With the process coordinating with equipment, adjustable temperature and speed of the aluminum liquid in the casting spile are achieved, and even transverse and longitudinal grain structures of a casting slab can be obtained.

Description

[0001] technical field

[0002] The invention relates to a grain size control method for producing ultra-wide double-zero aluminum foil blanks directly by electrolytic aluminum liquid casting and rolling, and belongs to the technical field of aluminum and aluminum alloy processing. Background technique

[0003] At present, about 70% of foreign aluminum foils are produced by ingot hot-rolled billets, while more than 80% of domestic aluminum foils are produced by casting and rolling methods. In 2005, Yunnan Xinmei Aluminum Foil Co., Ltd. used cast-rolled blanks for the first time in China to mass-produce aluminum foil for capacitors with a thickness of 0.005mm. In 2010, North China Aluminum was the first company to produce 1700mm wide double-zero aluminum foil blanks by using remelted aluminum ingot melting and casting rolling process.

[0004] It is more difficult to produce ultra-wide double-zero aluminum foil blanks directly with electrolytic aluminum liquid than to produc...

Examples

Embodiment 1

[0024] [1] Horizontal aluminum casting and rolling production line, put in remelted aluminum ingots and / or casting and rolling waste according to the proportion of 40% solid material, and the solid material is evenly dispersed to the bottom of the entire smelting furnace. Melt at low temperature for 10 hours, then raise the temperature of the molten aluminum to 740°C within 30 minutes for alloy preparation, refine the molten aluminum after the alloy composition is qualified, and transfer the molten aluminum to the static furnace after the refining is completed and stand for 35 minutes;

[0025] [2] After the converter, put it in the furnace every 4 hours, use Ar+CCl 4 Stir the molten aluminum evenly for 10 minutes;

[0026] [3] The molten aluminum in the stationary furnace reaches the front box through the degassing box and the filter box, and is injected into the gap between the two casting rolls through the casting nozzle for rolling. The liquid enters the filter box throug...

Embodiment 2

[0031] [1] Horizontal aluminum casting and rolling production line, put in remelted aluminum ingots and / or casting and rolling waste according to the proportion of 45% solid material, and the solid material is evenly dispersed to the bottom of the entire smelting furnace. Melt at low temperature for 5 hours, then raise the temperature of the molten aluminum to 750°C within 20 minutes for alloy preparation, refine the molten aluminum after the alloy composition is qualified, and transfer the molten aluminum to the static furnace after refining for 45 minutes;

[0032] [2] After the converter, put it in the furnace for every 5 hours, use Ar+CCl 4 Stir the molten aluminum evenly for 10 minutes; the following is the same as in Example 1.

[0033] The cast-rolled blanks with a width of 1750mm and 1920mm produced by the above implementation method are stably rolled to 0.0065mm, and the pinholes are all at 200 / m 2 Below, the best is 70 pcs / m 2 within.

[0001] technical field

[0002] The invention relates to a grain size control method for producing ultra-wide double-zero aluminum foil blanks directly by electrolytic aluminum liquid casting and rolling, and belongs to the technical field of aluminum and aluminum alloy processing. Background technique

[0003] At present, about 70% of foreign aluminum foils are produced by ingot hot-rolled billets, while more than 80% of domestic aluminum foils are produced by casting and rolling methods. In 2005, Yunnan Xinmei Aluminum Foil Co., Ltd. used cast-rolled blanks for the first time in China to mass-produce aluminum foil for capacitors with a thickness of 0.005mm. In 2010, North China Aluminum was the first company to produce 1700mm wide double-zero aluminum foil blanks by using remelted aluminum ingot melting and casting rolling process.

[0004] It is more difficult to produce ultra-wide double-zero aluminum foil blanks directly with electrolytic aluminum liquid than to produc...

Examples

Embodiment 1

[0024] [1] Horizontal aluminum casting and rolling production line, put in remelted aluminum ingots and / or casting and rolling waste according to the proportion of 40% solid material, and the solid material is evenly dispersed to the bottom of the entire smelting furnace. Melt at low temperature for 10 hours, then raise the temperature of the molten aluminum to 740°C within 30 minutes for alloy preparation, refine the molten aluminum after the alloy composition is qualified, and transfer the molten aluminum to the static furnace after the refining is completed and stand for 35 minutes;

[0025] [2] After the converter, put it in the furnace every 4 hours, use Ar+CCl 4 Stir the molten aluminum evenly for 10 minutes;

[0026] [3] The molten aluminum in the stationary furnace reaches the front box through the degassing box and the filter box, and is injected into the gap between the two casting rolls through the casting nozzle for rolling. The liquid enters the filter box throug...

Embodiment 2

[0031] [1] Horizontal aluminum casting and rolling production line, put in remelted aluminum ingots and / or casting and rolling waste according to the proportion of 45% solid material, and the solid material is evenly dispersed to the bottom of the entire smelting furnace. Melt at low temperature for 5 hours, then raise the temperature of the molten aluminum to 750°C within 20 minutes for alloy preparation, refine the molten aluminum after the alloy composition is qualified, and transfer the molten aluminum to the static furnace after refining for 45 minutes;

[0032] [2] After the converter, put it in the furnace for every 5 hours, use Ar+CCl 4 Stir the molten aluminum evenly for 10 minutes; the following is the same as in Example 1.

[0033] The cast-rolled blanks with a width of 1750mm and 1920mm produced by the above implementation method are stably rolled to 0.0065mm, and the pinholes are all at 200 / m 2 Below, the best is 70 pcs / m 2 within.

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