ã€China Aluminum Network】 China's current electrolytic aluminum production capacity surplus, expanding the application of aluminum, expanding aluminum consumption, in the field of transportation, "aluminum substitute steel", construction area "aluminum section wood", power sector "aluminum section copper" Such as one of the effective ways to resolve excess production capacity. It is understood that the current focus of the expansion of aluminum applications include: transportation, building structure, power sector. In addition, it also includes aluminum trays, aluminum flood protection facilities, aluminum alloy bridges, aluminum foil packaging and other products and fields.
Transportation: The application of aluminum trailers, aluminum convertible coal carriers, and passenger car high-precision aluminum alloy sheets has been expanded.
The use of aluminum profiles in the transportation sector can effectively reduce the weight, increase the payload, and prolong the service life. It is of great significance for energy conservation and emission reduction, as well as the economic benefits of the transportation industry and the efficiency of road transportation.
The scope of architectural structure: expanding the application of aluminum alloy building formwork and aluminum alloy enclosures (1) Expanding the application of aluminum alloy building templates At present, the application proportion of aluminum alloy formworks in China is less than 1%, and the construction of large-scale construction enterprises is standardized. The increasing industrialization and industrialization requirements, as well as the increasing public demand for housing quality, have given a huge boost to the application of aluminum alloy formwork. In recent years, due to the rapid development of the real estate industry, the production scale of China's construction formwork industry has maintained a growth rate of around 10 to 15%.
While the amount of domestic aluminum alloy formwork continues to grow, domestic companies also supply aluminum profiles and formwork aluminum profiles to Brazil, India, Venezuela and other countries as well as Hong Kong and Macau, which will also stimulate domestic aluminum consumption.
(2) Expanding the use of aluminum alloy enclosures In domestic civil construction, large-scale infrastructure projects, especially those with large spans and complex shapes, such as roofs and walls in airport terminals, convention centers, stadiums, and other public buildings Surface aluminum alloy sheets have been widely used. However, in industrial buildings, the ratio of steel structure containment system to the total construction volume is about 70%, and the application of aluminum alloys is less.
With the increase in the demand for engineering construction in the areas of overall, strategic, and public welfare such as the construction of agricultural infrastructure, affordable housing, and renovation of rural dilapidated buildings, the demand for aluminum alloy enclosures will increase significantly.
In the electricity sector, China’s copper resources are scarce and need to be imported. The consumption of copper in the electricity sector accounts for more than 40% of the total consumption. Using aluminum resources that have formed a strong industrial base in China, instead of ensuring insufficient copper resources, can reduce the external dependence of China’s copper resources to a certain extent. Strengthen resource support capabilities.
(1) Application of aluminum alloy cable promotion In the cable field, copper cable is still the main component, and the proportion of aluminum cable is only about 2%.
Wire and cable product categories include power cables, electrical equipment cables, winding wires, communication cables, bare overhead wires, etc. At present, China has used aluminum and aluminum alloys for all bare conductors; there are few aluminum and aluminum alloy cables for electrical equipment; the development trend of communication cables is that optical fibers are used as transmission conductors; some small electronic transformers have been used in winding wires. As a conductor, there is little promotion potential. Therefore, aluminum has the potential to be popularized in wire and cable is medium and low voltage power cables.
(2) Application of copper-aluminum composite conductor Copper-clad aluminum composite conductor consists of an aluminum core and a copper cladding layer. Using the “skin effect†of current, aluminum is used instead of copper in the middle part of the conductor. By increasing the cross-sectional area of ​​the conductor, the effect on the electrical conductivity is compensated to achieve the same electrical conductivity. Therefore, it is a kind of high-performance composite conductor that combines the advantages of copper with excellent electrical conductivity, good corrosion resistance, and low cost and light weight of aluminum.
In addition, a series of steel (stainless steel) aluminum composite, titanium aluminum composite, and aluminum aluminum composite panels, belts, foils, and row materials have been developed in China and are used in electric power, electronics, communications, heat dissipation, and construction industries.
Other products and areas (1) Traditional consumption areas with greater application potential compared to foreign countries With the change of consumer attitudes, improvement of consumption levels, improvement of food and drug safety management, and acceleration of industrialization, aluminum lunch boxes and aluminum foils Paper extraction, aluminum alloy trays, wine packaging, aluminum alloy aerosol cans, aluminum storage tanks and other market prospects.
(2) Aluminum alloy bridges, aluminum alloy flood prevention walls, etc., which have significant social benefits and need to be promoted, have significant social benefits, although they are not used in large amounts.
The materials of China's flyovers are mainly made of steel and other non-aluminum alloys, and the percentage of aluminum flyovers that have been built accounts for less than 2%. The aluminum alloy flyover has received more and more attention and recognition for its advantages of light weight, high strength, beautiful appearance, corrosion resistance, recyclability, and environmental protection. Not only can the flyover be made of aluminum, but if the highway bridge can gradually increase the proportion of aluminum use, the amount of aluminum it uses is much greater than that of the flyover.
Aluminum flood wall has the characteristics of light weight and simple installation. According to the calculation of 40 kg per meter of aluminum alloy flood wall, the amount of aluminum used for flood prevention walls of 1 km long and 2 m high is about 400 tons.
(3) Emerging products and applications that need to increase technological investment Aluminum air batteries, aluminum alloys for seawater desalination, etc.
Aluminum air battery: Aluminum-air battery has a high energy density, can achieve zero emission, no pollution, and easy to recycle during use. It can be used as a power battery, a signal battery, etc. It has a broad application prospect.
Aluminum alloy for seawater desalination: At present, the surface treatment technology for aluminum alloy tubes for seawater desalination is monopolized by foreign companies, and the application of “aluminum-based copper†for the heat transfer tubes of seawater desalination plants in China is urgently needed to break through the corrosion protection technology of heat transfer tube coatings and is currently under research and development. in.
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