A large capacity regenerative melting furnace is used to convert the primary aluminum into aluminum liquid, i el líquid entra a la màquina de colada i laminació a través de la ranura de flux. Durant el flux de l'alumini líquid, el refinador Al-Ti-B s'afegeix en línia per formar un efecte de refinament continu i uniforme. Desgasificació i escoria del rotor de grafit en línia a 730-735 °C, forming a continuous and uniform cleaning effect;
The molten aluminum after the first step is introduced into the casting and rolling machine to cast and roll into blank. In this process, the inlet temperature of the cooling water in the inner cavity of the roller is controlled at 20-23°C and the outlet temperature is controlled at 28-32*C. The static pressure of the aluminum melt between the rolls is controlled at 0.004-0.005Mpa, and the surface ratio of the crystal direction {100} is greater than 95% and the grain size is less than 5μm. The slab of 6.5-7.5mm is rolled out.
When the thickness of the slab is 4.5mm, the slab is sent to the annealing furnace, heated to 360°C and held for 2 hours, and then heated to 580°C and held for 18 hours. The homogenized annealing is carried out to make the grain size uniform and the orientation consistent. Then, it was cold rolled to 0.60mm in the cold rolling machine, and sent to the annealing furnace again, heated to 460°C, held for 5 hours, cooled to 400°C, held for 7 hours, and carried out intermediate annealing; Then continue rolling into a thickness of 0.3mm as aluminum foil wool;
The 0.3mm aluminum foil material was rolled into finished aluminum foil by a four-high irreversible foil rolling mill. The production process of the ultra-thin aluminum foil is short, the operation cost is low, the production investment is small, and the quality of the ultra-thin aluminum foil produced can reach the most advanced international level. Compared with the production process of the hot rolling method, the investment cost is reduced by two thirds in the production of blank, and the operation cost is reduced by more than half.
