Aluminum strips are one of the most extensively used industrial metals that are needed in varied industries. In metal working, rolling is a metal forming process in which metal stock is passed through one or more pairs of rolls to reduce the thickness and to make the thickness uniform. Aluminum Strip Rolling Mill is used to manufacture the aluminum strips.
Aluminum Strip Rolling Mill Technology
The hot strip production process –traditionally the molten metal is cast after refining and alloying processes into 10 to 25-ton slabs in semi-continuous casters, then preannealed, hot-rolled in single-stand or tandem hot rolling mills and, at a strip thickness of 6 to 2.5 mm, coiled at a temperature of about 300°C. More economical in terms of energy saving is the direct casting process into strips of 12 to 20 mm thickness in twin-belt casters with a continuing hot rolling process in a tandem hot rolling line at an hourly production rate of 25 kg per mm width. The suitability of this process is restricted to a limited number of alloys allowing a quick cooling without segregation.
Thin-strip and foil rolling – is the finishing operation for nearly all flat-rolled products on non-reversing single-stand rolling mills. Either universal rolling mills or groups or lines of two to five rolling mills are used. The thin-strip rolling mills used for the production of can stock provide extremely narrow strip gauge and flatness tolerances. Lithographic sheet rolling mills, in particular, fulfill high demands on the strip surface. Foil rolling mills are the most accurate in gauge and tension controls. All rolling mills used for these different purposes are equipped with specific components to ensure the quality requirements. The last pass of foil rolling is done with a double web. This requires a doubling operation of foils after the penultimate pass and a separating operation after the last pass. The finished foil typically consists of a shiny and a matt side. Both sides are used for different printing images in a later stage.