Dongguan Dongcheng Yuanfeng renewable resource recycling shop Contact: Mr. Liu Mobile: 13580923273 Fax: 0769-27281633 QQ: 3134486974 Website: http: //www.yfzy88.com/ Address: Dongguan Dongcheng District, with the sand pit Dongguan Huang Kung Far East Feng-renewable resources recycling shop has been in existence for many years, it is a large scrap metal recycling companies in Dongguan. Specializing in scrap metal scrap copper and other nonferrous metals recovery and recycling of used molds and chrome steel business. The company expand into Shenzhen, Huizhou, Guangzhou, Zhongshan and other cities, while my company adhere to the "Economic development, to protect the environment" approach, adhere to the "credibility of the first, service first" principle in order to save energy and resources as well as to all enterprises to reduce production costs, to provide our clients with excellent service funding. China is committed to building the province's largest, most professional waste recycling industry. Dongguan Dongcheng Yuanfeng renewable resources, recycling is a full license, with the recovery of qualification units. Units of environmental protection, science and technology, standardized as the center for the environmental protection industry activities. The above information is the industry news and information, and promotion of information independent of aluminum and aluminum-based aluminum 7.5% crust. The earliest written records about the aluminum found in the first century Roman writer Gass Pooley Vilnius (Gaius Plinius) papers. But aluminum advent precisely should be in 1825, German Weller (F. Wehler) obtained by chemical reduction method aluminum metal. With respect to iron and copper and other ancient metals, aluminum is considered a very young metal. However metallurgy, production, processing and application technology of aluminum very quickly. 1882 world annual production of aluminum only 2t. Counted as precious metals. Only 100 years now. Aluminum has become the second largest after steel metal material. One of the most prominent features of aluminum is its broad applicability. From high purity aluminum to aluminum complex components are applied. There are as many as three hundred kinds or more components or grades. The most important feature of the basic properties of aluminum and aluminum scrap recycling aluminum is a low density of only 2. 702 X 103 kg / M3. Equivalent to 1/3 of the density of iron. Aluminum electrical conductivity, thermal conductivity is very good. Aluminum conductivity second only to silver and copper, so is often used in place of aluminum produced valuable copper power lines and other electrical components. Strength aluminum is not high (for 80 ^ -. I OOMPa). However, alloying element in aluminum forming aluminum alloy mechanical properties can be significantly improved. Due to the low density of aluminum, if the specific strength meter The strength hard aluminum is comparable to high-strength steel. Coupled with good forming properties, aluminum is the preferred material for lightweight construction. Because of this characteristic. Aluminum in industrial applications beginning closely linked with the aircraft industry together to become the most important aircraft manufacturing materials. Another outstanding advantage of aluminum and aluminum antioxidant and good corrosion resistance. The characteristics make aluminum and aluminum during use can long maintain its good appearance. Durability. Thus, widely used in interior and exterior manufacturing daily necessities and buildings. This feature is also making aluminum and aluminum alloys can be recovered intact after the service period. Is the highest of all common metallic materials its recycling value. Chemical properties of aluminum is extremely lively. Easy to combine with oxygen in the air. Forming an oxide film on the surface. Under normal circumstances. Continuous aluminum surface of an aluminum oxide film, compact and well combined with the aluminum body can continue to effectively prevent the oxidation of aluminum. . Oxide film can still be maintained even if the protective effect of aluminum in the molten state. The degree of oxidation of aluminum with temperature, the degree of pulverization, and wherein the metal content of related impurities. Thickness of the aluminum oxide film formed on the surface in the general atmosphere. Is a function of temperature. At room temperature. The surface of the aluminum oxide film thickness of about 2.5-5. O} cm. When the temperature is higher than the melting point of aluminum · the oxidation rate increase. Small particles of aluminum will produce severe burn when heated in air. When the aluminum containing magnesium, calcium, sodium, silicon and copper. Increase the oxidation strength. Where the presence of impurities. Adhesion to aluminum oxide film is greatly reduced, oxide film is easily broken. Protective effect of weakening