Aluminum foil production process

The first step:

smelting: convert primary aluminum into aluminum liquid by large capacity regenerative melting furnace, and enter the casting and rolling machine through the flow tank. During the flow process of aluminum liquid, the refiner al-ti-b is added online to form a continuous and even refining effect. The graphite rotor can be degassed and slag removed online at 730-735℃ to form a continuous and even cleaning effect.

The second step:

roughing: the molten aluminum in the first step is introduced into the casting and rolling machine to form the billet.During this process, the inlet temperature of cooling water in the roller cavity is controlled at 20-23℃, the outlet temperature is controlled at 28-32℃, and the static pressure of the interseam aluminum melt is controlled at 0.004-0.005mpa to ensure the crystallization direction of the material {100; Surface rate >95%, grain size<5u m, rolled6.5-7.5mm slab.

The third step:

intermediate rolling: the slab is rolled again by the cold rolling machine until the thickness is 4.5mm, then it is sent to the annealing furnace, heated to 360 ° c for 2 hours, and then heated to 580 ° c for 18 hours for uniform annealing to make the grain size even and the direction consistent. Then continue to cold roll in the cold mill to 0.60mm, and send it into the annealing furnace again. After heating to 460℃ and holding for 5 hours, cool down to 400℃ and holding for 7 hours for intermediate annealing. Then continue to roll into thickness of 0.3mm as aluminum foil wool;

The fourth step:

foil rolling: the above 0.3mm aluminum foil wool is rolled into aluminum foil products by a four-roll irreversible foil rolling machine. The production process of the ultra-thin aluminum foil is short, with low operating cost and small production investment, and the quality of the ultra-thin aluminum foil produced can reach the most advanced level in the world. Compared with the hot-rolling production process, the investment cost of the production blank is reduced by two-thirds, and the production process is completedBen cut it by more than half.