Aluminum foil plant design (design of aluminium foil workshop) to about 0.5mm thick aluminum billet as raw material, annealing and rolling, the volume, cutting processes, the production of aluminum foil plant plant design. The thickness of the aluminum foil is 0.006 to 0.2 mm, the width of use is generally less than 1000 mm, and the production is usually carried out in multiple steps, and the maximum rolling width is up to 2000 mm. The user is supplied in a soft state and a hard state. The deep processing products of aluminum foil include composite aluminum foil combined with paper or plastic film, embossed, colored and printed color aluminum foil and coated aluminum foil coated with water, oil and insulation coating agents. According to the specific conditions of the factory, the above products can be produced in the aluminum foil workshop, or the aluminum foil deep processing workshop can be built separately. The main contents of the design are: process selection, equipment selection and workshop layout.
The process is selected from aluminum foil blanks with a thickness of about 0.5 mm as raw materials, and the aluminum foil finished products are generally produced through annealing, preliminary rolling, medium rolling, cleaning, coiling, finishing rolling, winding, annealing and shearing. There are two current aluminum foil rolling processes. One is a group rolling process using one rolling mill per pass. This process requires a large number of rolling mills (forming a rolling mill population), and annealing and cleaning are required in the middle of rolling to produce thin gauge aluminum foil. Another process is to concentrate the rolling of each pass on the coarse, medium and finishing mills. It can be produced by one, two or more rolling mills, generally without intermediate annealing and cleaning. The former has small specifications, low equipment level and low construction investment, and is suitable for production scale of several hundred tons to 1-2 kt per year. The latter has large specifications, high equipment level, high product quality and high production efficiency, and is suitable for production scale of several thousand to tens of thousands of tons per year. Finished annealing of aluminum foil, there are two systems of low temperature and long time and high temperature and short time. When the low temperature is annealed for a long time, the residual lubricating oil on the aluminum foil coil is volatilized for a sufficient period of time, and the surface is bright after annealing, but the number of furnaces is required to be large. High temperature short time annealing, generally suitable for group rolling process. The production of thin gauge aluminum foil requires stacking and rolling before stacking. The co-rolling process can be set separately, or it can be completed in one pass and finish rolling on the finishing mill.
The aluminum foil after the rolling is to be divided, and the slit can be slit at the same time, and the slit width is 200 mm or more. The finished product of aluminum foil is cut on a thick gauge shearing machine and a thin gauge shearing machine depending on the thickness. Cut to the width required by the user and wrap around the core of the specified diameter. Equipment options include the choice of aluminum foil mills, annealing furnaces, winders, shears and deep processing equipment. There are two types of aluminum foil rolling mills: two-roller and four-roller. In the two-roll mill, the length of the roll is usually less than 800 mm. The adjustment of the pressing force, tension and thickness is manually controlled, and it is only used when the group rolling process is adopted. The four-roll reversing mill is similar in level to the two-roller type and is generally used only for the initial rolling of aluminum foil. The four-roller irreversible mill is the main model used in the production of aluminum foil after the 1970s. The roll length of the mill is more than 800mm. It is equipped with automatic control system for hydraulic pressing, thickness, tension and speed, and plate type control system. Its products High precision and production efficiency, can be used as the primary, middle and finishing mill of aluminum foil. When the production scale is 2~3kt/a, the universal aluminum foil rolling mill can be used. The rolling mill has the characteristics of full control mode, wide rolling range and fast roll changing speed, and can complete the initial, middle and finish rolling of the aluminum foil on one rolling mill.
The annealing furnace includes a billet annealing furnace and a finished annealing furnace. Blank annealing furnaces are usually selected from box annealing furnaces with air circulation. Finished annealed foils are small rolls that are slit and sheared, usually with vertical furnaces and box furnaces with air circulation. When the number of furnaces is large, a uniform loading and unloading mechanism can be selected. The winder is used to divide the laminated aluminum foil into individual aluminum foils. The thickness of the split aluminum foil is 0.006 to 0.040 mm, and the speed of the winder is usually 10 to 20 m/s. The tension of the take-up can be reduced as the diameter of the foil roll increases to adjust the tightness of the web. The winder can be equipped with a feeding, unwinding device and automatic unloading mechanism to form a unit. The foil shearing machine has an aluminum foil having a thickness of 0.04 to 0.2 mm, and a thick gauge shearing machine; an aluminum foil having a thickness of 0.006 to 0.04 mm is used, and a thin gauge shearing machine is used. The shear rate is below 10 m/s. The shear tension can be adjusted as the foil diameter changes. The deep processing equipment includes wet and dry laminating machine for aluminum foil and paper or plastic film composite; printing machine for aluminum foil coloring and printing; aluminum foil embossing machine for pressing various patterns, etc., can be selected according to requirements. The layout of the workshop is combined with the conditions of the plant and can be configured in the form of a long strip, a multi-span or a vertical span. When using a multi-span arrangement, the main span is the mill span. The secondary side of the rolling mill drive side is equipped with electrical, hydraulic, lubrication, oil mist recovery equipment. Among them, the electronic computer and control equipment are placed in separate rooms, hydraulic and lubrication equipment are placed in the basement, and the oil mist recovery device is located outdoors. The auxiliary span of the non-drive side of the rolling mill is equipped with an annealing furnace, a winder, a shearing machine and a finished packaging site. The roll grinder is placed in a room separated by a rolling mill. The deep-worked portion of the aluminum foil may be placed in an auxiliary spanned room or in a separate enclosed building. When the dust content in the atmosphere is large, the plant is generally fully enclosed, mechanically ventilated, and the roof is equipped with a hood for lighting; the entrance and exit of the workshop are set up with a gallery, and the vehicle enters the workshop after removing mud from the corridor. When the surrounding environment is clean, the plant can be designed according to the general plant with natural ventilation and lighting.
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