Development process and current situation of alumi

The development process and current situation of aluminum cans in the world market

metal beer and beverage cans have a history of more than 70 years. In the early 1930s, the United States has begun to produce beer metal cans. This three piece can is made of tin sheet. The upper part of the can body is conical, and the top is a coronal can cover. Its general shape is not much different from that of glass bottles, so it was initially filled with glass bottle filling line, and a special filling line was not established until the 1950s. The tank cover evolved into a flat shape in the mid-1950s, and was improved into an aluminum ring cover in the 1960s

aluminum beverage cans first appeared in the late 1950s, and two-piece DWI cans were officially launched in the early 1960s. Aluminum cans have developed very rapidly. By the end of this century, the annual consumption has reached more than 180 billion, which is the largest category in the world's total metal cans (about 400 billion). The consumption of aluminum used in the manufacture of aluminum cans also increased rapidly. It was close to zero in 1963 and reached 3.6 million tons in 1997, equivalent to 15% of the total consumption of all kinds of aluminum in the world

the United States is the largest producer and consumer of aluminum beverage cans in the world. The number of aluminum cans used in the United States exceeded 62billion in 1984, 70billion in 1987, 80billion in 1988, 90billion in 1990 and 100billion in 1994. American aluminum cans are mainly used for packaging beverages. For example, in 1992, the number of aluminum cans for beverages was 92.8 billion, accounting for 97% of the total 95.7 billion cans in that year, and the number of tin cans was only 2.9 billion, accounting for 3%. In 2001, the consumption of beer and soft drink aluminum cans in the United States was nearly 100billion, including 64billion soft drink cans and 33billion beer cans. The output of aluminum cans in Japan has increased for many years, from 3 billion in 1985 to 5.5 billion in 1987, 8.1 billion in 1989, 10.2 billion in 1991, 11.8 billion in 1993, 15.9 billion in 1995 and 16.6 billion in 1997. Most of the aluminum cans are beer. If you know these faults and can master the methods to solve them, for example, in 1997, it was 9.5 billion, accounting for 57%, carbonated beverage cans were 3.5 billion, accounting for 21%, and other beverage cans were 3 billion Accounting for 18%. Since the mid-1980s, the European beverage can market has been showing a steady growth trend. In 1990, the consumption of beverage cans in Europe exceeded 20billion for the first time, reaching 25billion in 1993 and exceeding 30billion in 1995. In 1996, it fell by 2%, from 32.2 billion last year to 31.6 billion. In 1997, the European beverage can market resumed steady growth, with an annual growth rate of 5%, and the total consumption rose to 33.5 billion, the highest level in history. Among them, Qing Northcote predicts that 18.5 billion cold drink cans with such materials and technologies can be used on refrigerators to be launched next year, an increase of 5.1% over the previous year, and beer cans will constitute 15 billion high molecular polymers, an increase of 7% over the previous year. Iron cans and aluminum cans account for about half of European beverage cans. The consumption of aluminum cans in central and South America is also relatively large, nearly 20billion each year. The annual consumption of aluminum cans in Asia (excluding Japan) is no less than 20billion. The consumption of aluminum cans in China is now more than 8 billion per year

for decades, the manufacturing technology of aluminum cans has been continuously improved. The weight of aluminum cans has been greatly reduced. In the early 1960s, the weight of each thousand aluminum cans (including the body and cover) reached 55 pounds (about 25 kg), which fell to 44.8 pounds (25 kg) in the mid-1970s, and then decreased to 33 pounds (15 kg) in the late 1990s. Now it has been reduced to less than 30 pounds, nearly half less than 40 years ago. In the 20 years from 1975 to 1995, the number of aluminum cans (with a capacity of 12 ounces) made of 1 pound of aluminum increased by 35%. In addition, according to the statistics of Alcoa company in the United States, the aluminum material required for each thousand aluminum cans decreased from 25.8 pounds in 1988 to 22.5 pounds in 1998 and to 22.3 pounds in 2000. After the completion of seam sealing machine spraying in American can making enterprises, mechanical and other technologies continue to make breakthroughs, so the aluminum thickness of American aluminum cans has decreased significantly, from 0.343 mm in 1984 to 0.285 mm in 1992 and 0.259 mm in 1998

the lightweight progress of aluminum can lid is also obvious. The thickness of aluminum for tank cover decreased from 0.39 mm in the early 1960s to 0.36 mm in the 1970s, from 0.28 mm to 0.30 mm in 1980, and from 0.24 mm in the mid-1980s. The diameter of the tank cover has also been reduced. The weight of the can cover has been continuously reduced. The weight of a thousand aluminum cans was 13 pounds in 1974, 12 pounds in 1980, 11 pounds in 1984, 10 pounds in 1986, 9 pounds and 8 pounds in 1990 and 1992, and 6.6 pounds in 2002. The speed of can making has increased significantly, from 650 ~ 1000cpm (only/minute) in the 1970s to 1000 ~ 1750cpm in the 1980s and more than 2000cpm now

many countries, especially developed countries, attach great importance to the recycling and utilization of used waste metal cans, and the recycling and reuse rate of metal cans is also increasing. For example, the recycling rate of aluminum cans in the United States has exceeded 50% as early as the 1980s. It was 63.6% in 1990, 65.4% in 1994, 66.5% in 1997, 62.5% in 1999 and 62.1% in 2000. The recycling rate of aluminum cans in Japan increased from 43% in 1990 to 58% in 1993, 70% in 1996, 79% in 1999 and 83% in 2001