At present, China has a small quantity of tinplate tin cans with aluminum can lids. There are only a few products such as rice pudding, walnuts, and peanuts. It is estimated that in the future, it will increase at a rate of 5% each year. According to the forecast of China Beverage Association, the output of carbonated soft drinks will reach 8 million tons by 2010. If the canning rate is calculated at 20%, the amount of cans will reach 12.4 billion.
Second, the world aluminum cans market progress
The current annual global demand is about 210 billion, accounting for more than half of the global metal container production. The proportion of aluminum cans consumed in major regions of the world is 53% in North America, 19% in Europe (including Australia, New Zealand), 14% in South America, and 14% in Asia.
From a global perspective, the global aluminum can market is mainly distributed in developed countries and regions, of which the United States is a major consumer and production base; aluminum strip cans and aluminum cans are relatively mature in production, aluminum cans used in cans The annual demand is about 4 million tons, and it will increase steadily with the continuous improvement of people's consumption level and the enhancement of environmental awareness.
The aluminium strip for cans is a big market, and the annual consumption accounts for 1/4 of the global aluminum rolled material consumption. Therefore, the aluminum strips used for cans abroad have been universally produced, and the technical process has also become mature. The world's leading aluminum companies such as Alcoa, Caesar's Aluminium Chemicals, Hydro Aluminium, Aluminum Canada, Cocamco Australia, Japan Light Metals, etc., can produce high-quality aluminum cans Strips, now all have achieved international production and operations, and have occupied China's aluminum cans with aluminum strip market. For example, the Alcoa Tennessee Plant mainly produces aluminum cans for aluminum cans, hot rolling SMS five-stand hot rolling, the annual output of about 450,000 tons.
Third, aluminum cans processing technology
Aluminum cans occupy a considerable proportion in beverage packaging containers. The manufacture of cans combines the advanced technologies of many industries such as metallurgy, chemical engineering, machinery, electronics, and food, becoming a microcosm of aluminum deep processing. With the ever-increasing competition in the beverage packaging market, for many can-making companies, how to reduce the sheet thickness, reduce the quality of single cans, increase material utilization, and reduce production costs in the production of cans is a goal pursued by companies. The important goal.
Due to the complex process of aluminum cans and the demand for raw materials, three-quarters of domestic cans rely on imports, and the raw materials used in domestic cans are all dependent on imports. The two projects consume more than US$1 billion in foreign exchange annually, becoming an importer of cars, color TVs, The fourth largest consumer of foreign exchange after the refrigerator.
Aluminium cans remanufactured aluminum, which consumed 71% less energy and 95% less air pollution than aluminium extracted with alumina. Many countries, especially developed countries, attach great importance to the recycling and utilization of used aluminum cans after use, and the recycling rate has also been increasing.
The recycling technology of discarded cans has developed weakly in China, and huge waste has also been formed. This has led to the huge exchange of cans after a one-time use, immediately declared scrapped, causing huge waste. At the same time, aluminum cans that cannot be recycled have caused huge environmental pollution. The market is calling for economized raw materials that can replace aluminum cans.
At present, the international aluminum price is continuously rising. The output of domestic aluminum cans has far exceeded the demand. Three out of 25 aluminum can-making companies in China have closed down. At present, experiments have proved that during the processing of cans, once the protective coating is peeled off, it will cause contact between the aluminum alloy on the inner wall of the can and the beverage. Over time, the aluminum element gradually dissolves, especially when the can is filled with acidic or alkaline beverages. Human harm is greater. Coupled with aluminum cans polluting the environment, the country has introduced a corresponding policy, clearly stated that it will no longer approve the new aluminum can production line. In this case, steel cans and paper cans emerged as alternatives to aluminum cans.