Classification Of Imported Waste Aluminum

①Single varieties of scrap aluminum

Such waste aluminum is generally a certain type of waste parts, such as pistons of internal combustion engines, automobile reducer shells, automobile wheels, and automobile front and rear safety bolts. Aluminum doors and windows. These scrap aluminums have been clearly classified at the time of import, with a single variety, and are all imported in batches, so they are high-quality recycled aluminum raw materials.

②Scrap aluminum chips

Scrap aluminum chips are also referred to as slicing for short, which is a higher grade of scrap aluminum. The reason why it is called slicing is because many developed countries use mechanical whirling methods to break scrap into scrap when handling scrapped cars, waste equipment and various household appliances, and then high-quality scrap aluminum slicing is better than other scrap aluminum. The price is expensive, it is suitable for large-scale modern enterprises, and it is difficult to buy in the international market. Therefore, except for wholly foreign-owned or joint venture imports, China’s general recycled aluminum plants rarely use this kind of waste. After mechanized sorting, the sorted scrap aluminum is scrap aluminum slices. In addition, when the recycling department processes some larger-volume waste aluminum parts, it also uses the crushing method to break them into pieces. Such pieces are also called waste aluminum slices. The scrap aluminum slices are easy to transport, easy to sort, and the texture is relatively pure, which is also a high-quality scrap aluminum material. At present, in the scrap aluminum trade in the international market, slices occupy a large amount, and various slices are developing towards standardization. In terms of the composition of the slices, they are generally divided into several grades. Among them, the slices with high grades are relatively pure mixtures of various aluminum scraps and their alloys, and most of them can be smelted in the furnace without any treatment. The low slices contain different amounts of other impurities, generally containing 80%-90% or more of waste aluminum. Among them, the impurities are mainly non-ferrous metals such as scrap steel and copper, and a small amount of waste rubber. After manual selection, they are obtained Pure scrap aluminum. Smelting of scrap aluminum is also relatively easy. It is convenient to enter the furnace during smelting, easy to remove impurities, low flux consumption, high metal recovery rate, low energy consumption, and low processing cost. It is very popular among users. main ingreadient.

High-quality scrap aluminum slices are more expensive than other scrap aluminum, adapt to large-scale modern enterprises, and are difficult to purchase in the international market. Therefore, except for wholly-owned or joint ventures imported by our country, this kind of scrap is rarely used by general recycled aluminum plants. .

③ Mixed waste aluminum

This type of waste aluminum has complex composition and different physical shapes. In addition to waste aluminum, it also contains a certain amount of metals such as scrap steel, scrap lead, scrap zinc, scrap rubber, scrap wood, scrap plastic, stones, etc. Scrap aluminum and scrap steel machinery are combined together. The composition of this type of scrap is complex, a small amount of scrap aluminum is large, and the surface is clear, which is easy to sort. This kind of scrap must be pre-sorted before smelting, that is, manually picking out scrap and other impurities.

④Aluminum-containing crushed aluminum material after incineration

This kind of aluminum material is a low-grade aluminum-containing waste material, which is mainly a crushed product of various scrapped household appliances, etc., and a part of the scrap steel is sorted out and then incinerated. The purpose of incineration is to remove combustible materials such as waste rubber and waste plastic. This type of aluminum-containing scrap generally has an aluminum content of about 40% to 60%, and the rest is mainly non-ferrous metals such as garbage (bricks and stones), scrap steel, and a very small amount of copper (copper wire). The bulk of aluminum is generally less than 10 cm. During the incineration process, some aluminum and low-melting substances such as zinc, lead, tin, etc. are melted, forming a glass-like surface material with other materials. .

⑤ Mixed broken scrap aluminum

This kind of scrap is low-grade scrap aluminum, and its composition is very complicated. It contains various scrap aluminum in 40%-50%. The rest is scrap steel, a small amount of lead and copper, a large amount of garbage, stones and soil, waste Plastics, waste paper, etc., soil accounts for about 25%, scrap steel accounts for 10%-20%, and stones account for 3-5%.