ã€China Aluminum Network】 Due to its light weight, corrosion resistance, electrical conductivity, and ductility, aluminum has now become the second-largest type of metal material except steel, and is widely used in various fields. Also included in the field of refrigerating and refrigeration, aluminum row in the field of refrigeration and refrigeration is a more typical successful product. The use of a high-quality aluminum row in the cold storage can ensure the stable operation of the refrigeration system and achieve the effect of energy saving. The use of low-quality aluminum platoons on cold storage will cause leakage of refrigerants and even cause the explosion of cold storage. There are many aluminum extrusion products on the market. How to distinguish the quality of the aluminum products? To judge the quality of the product, we must begin with the selection of materials. The Cooling News section will open up special topics - aluminum fog will be explained in detail for everyone. Today's question for everyone is the fog of material in aluminum traps.
An interview conducted by a reporter found that there are two kinds of pure aluminum ingots and recycled aluminum used by enterprises producing aluminum extrusions on the market. What's the difference between the two?
Aluminum is an active metal, chemical symbol is Al, atomic number: 13, silvery white light metal, has ductility, and immediately forms a dense oxide film with a thickness of about 50 angstroms (1 angstrom = 0.1 nanometers) on the surface of aluminum in dry air. No further oxidation and water resistance. The aluminum row produced from aluminum has many advantages such as moisture retention, constant storage temperature, energy saving, environmental protection, easy installation, long service life, etc. Therefore, it is widely used in cold storage.
Pure aluminum ingots, also known as electrolytic aluminum or raw ecological aluminum, refer to primary aluminum produced using electrolytic cells, which have a high aluminum content and must reach 99.7% or more. Because pure aluminum ingots have high purity, few impurities, and relatively stable chemical properties. Therefore, the aluminum row products produced by it can better guarantee the refrigeration effect of the cold storage. In the market, pure aluminum ingots are much more expensive than recycled aluminum.
Recycled aluminum refers to aluminum produced by using recycled aluminum scrap as its main raw material. Because of its different uses, other substances such as silicon, magnesium, and iron have been added to the content of components, so aluminum ingots are also called composite aluminum ingots. . Composite aluminum ingot production process is relatively simple, generally lower than the price of primary aluminum. Due to the high content of impurities and the high content of recycled aluminum, recycled aluminum is easily chemically reacted with its own impurities. If the aluminum used in the production of recycled aluminum is used in a cold store, it may also be associated with the lubricating oil and refrigeration in refrigeration systems. Agents react. Moreover, the regeneration of aluminum alloy itself and aluminum will produce a dry cell efficiency, and aluminum may be oxidized into powder. If the aluminum row produced from recycled aluminum is used as a raw material, the aluminum exhaust gas tightness may be poor due to quality instability, and even serious screen-like holes may be generated, leading directly to the leakage of refrigerant, thus affecting the refrigeration system. Normal operation and the loss of a series of associated cold storage items.
Since the cold storage is in a high-humidity environment for a long time, the aluminum row products produced from pure aluminum ingots are more reliable than those produced from recycled aluminum. In the investigation of the reporter, Mr. Liu Zhenyuan, General Manager of Xingyuan City Frost Source Refrigeration Equipment Co., Ltd. stated that the aluminum material selected for the cold storage aluminum row is of crucial importance. The amount of impurities contained in the aluminum row has a great influence on the service life of the aluminum row. The aluminum materials used in the source aluminum row are all higher than the national standard 6063T5, and the aluminum used in the cream source is mainly pure aluminum ingots with a content of 99.7% and high-purity aluminum ingots with a purity of 99.99%. In order to ensure the pure quality of aluminum raw materials, the source of frost is only purchased from big brand manufacturers.
Aluminum is very important to exclude the selection, the welding process is also very different, why some aluminum row welded joints neat, the surface is clean, and some aluminum welding seam at a pile of welding slag, welding debris, the surface also There are many other impurities. Differences in the aluminum row welding process also affect the cold storage effect.
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