Production process of ultra-thin aluminum foil

A short-flow production process of ultra-thin aluminum foil, which is characterized in that it is carried out according to the following process steps:

The first step, smelting: Use a large-capacity regenerative smelting furnace to convert the primary aluminum into molten aluminum, and enter the casting and rolling mill through the launder. During the flow of the molten aluminum, the refiner Al-Ti-B is added online to form a continuous uniform Refinement effect; the graphite rotor is on-line degassing and slag removal at 730-735 ℃, forming a continuous and uniform removal effect;

The second step, rough rolling: The molten aluminum in the first step is introduced into the casting mill for casting and rolling into billets; in this process, the cooling water inlet temperature in the inner cavity of the roll is controlled at 20-23°C, and the outlet water temperature is controlled at 28-32℃, the static pressure of the aluminum melt between the roll gaps is controlled at 0.004-0.005Mpa to ensure that the crystalline direction of the material is {100} area ratio> 95%, and the grain size is ≤ 5μm, and slabs of 6.5-7.5mm are rolled ;

The third step, intermediate rolling: The above-mentioned slab is rolled again with a cold rolling mill, and when the thickness reaches 4.5mm, it is sent into the annealing furnace, heated to 360°C for 2 hours, and then heated to 580°C. 、Hold for 18 hours, conduct homogenization annealing to make the grain size uniform and the directionality consistent; then continue to cold-roll in the cold rolling mill to 0.60mm, send it to the annealing furnace again, heat to 460℃, keep for 5 hours After that, the temperature is lowered to 400°C, the temperature is kept for 7 hours, and the intermediate annealing is carried out; then, it continues to be rolled into a thickness of 0.3mm as the aluminum foil wool;

The fourth step, foil rolling: A four-roll irreversible foil rolling mill is used to roll the above 0.3mm aluminum foil wool into finished aluminum foil products. The production process of the ultra-thin aluminum foil is short, the operating cost is low, and the scale of production investment is small. The quality of the produced ultra-thin aluminum foil can reach the most advanced level in the world. Compared with the production process of the hot rolling method, the investment cost is reduced in the production of billets. Two-thirds, operating costs are reduced by more than half.

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Aluminum foil production line


  • Package: Wooden case
  • Standard Wooden case specification: Length*Width*Hight=1.4m*1.3m*0.8m
  • Once needed,wooden case dimension could be redesigned as required.
  • Per wooden case Gross Weight scale: 500-700KG Net Weight: 450-650KG
  • Remark: For special packaging requirements, corresponding shall be added accordingly.