ã€China Aluminum Industry Network】 A short-flow production process for ultra-thin aluminum foil is characterized by the following process steps:
Relying on the previous step, smelting: Using the large-capacity regenerative smelting furnace, the raw aluminum is converted into aluminum liquid and passed through the flow cell into the casting mill. During the flow of molten aluminum, the refiner Al-Ti-B is added on-line to form a continuous and uniform layer. Refinement effect; the graphite rotor is degassed and slag removed online at 730-735°C to form a continuous and uniform removal effect;
In the second step, rough rolling: the molten aluminum smelted by the previous step is introduced into a casting mill and cast into blanks; in this process, the cooling water inlet temperature of the roll body cavity is controlled at 20-23° C. and the outlet water temperature is controlled at At 28-32°C, the static pressure of the aluminum melt between the roll gaps is controlled at 0.004-0.005 Mpa, which ensures that the crystal orientation of the material is {100} surface area> 95%, grain size is ≤ 5 μm, and a slab of 6.5-7.5 mm is rolled out. ;
The third step, intermediate rolling: The above-mentioned slab is rolled again by a cold rolling mill, and when the thickness is 4.5 mm, it is sent to an annealing furnace, heated to 360° C., kept for 2 hours, and then heated to 580° C. , Incubate for 18 hours, homogenize and anneal, make the crystal grain size uniform, the directionality is consistent; Then continue to cold-roll to 0.60mm in the cold rolling mill, again send it into the annealing furnace, heat to 460°C, keep warm for 5 hours. After that, the temperature was lowered to 400° C., and the temperature was maintained for 7 hours. Intermediate annealing was performed. Then, the thickness was 0.3 mm as aluminum foil material.
The fourth step, foil rolling: The four-roll irreversible foil rolling unit will roll the 0.3mm aluminum foil wool into finished aluminum foil. The production process flow of the ultra-thin aluminum foil is short, the operation cost is low, the production investment scale is small, and the quality of the ultra-thin aluminum foil produced can reach the internationally advanced level. Compared with the production process of the hot-rolling process, the investment cost is reduced on the production billet. Two-thirds of the operating costs are reduced by more than half.
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