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ALUMINIUM INGOTS

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by - 11/10/2015 4766 Views

Economically & Ecologically Valuable Metal

Aluminum production has been ongoing for over a century and is still going strong. One of the key factors in the success of aluminum is its recyclability. In fact, aluminium scrap recycling has proven so valuable—both economically and ecologically—that recovery and recycling has become its own industry, and a highly successful one. The scrap aluminium is separated into a range of categories e.g. irony aluminium (engine blocks etc.), clean aluminium (alloy wheels). Scraps are classified according to ISRI.

Depending on the specification of the required ingot casting, it will depend on the type of scrap used in the start melt. Generally, the scrap is charged to a reverberatory furnace (other methods appear to be either less economical and/or dangerous) and melted down to form a "bath". The molten metal is tested using spectroscopy on a sample taken from the melt to determine what refinements are needed to produce the final casts.

After the refinements have been added, the melt may be tested several times to be able to fine-tune the batch to the specific standard. Once the correct "recipe" of metal is available, the furnace is tapped and poured into ingot moulds, usually via a casting machine. The melt is then left to cool, stacked and sold on as cast silicon–aluminium ingot to various industries for re-use. Mainly, cast alloys like ADC12, LM2, AlSi132, LM24 etc. are produced. These secondary alloys ingots are used in die cast companies.

The recycling of aluminium generally produces significant cost savings over the production of new aluminium, even when the cost of collection, separation and recycling are taken into account. Over the long term, even larger national savings are made when the reduction in the capital costs associated with landfills, mines, and international shipping of raw aluminium are considered. (Source: https://en.wikipedia.org/wiki/Aluminium_recycling

While UBC (Used Beverages Can) are the most visible part of the aluminum scrap recycling story, they are far from the whole story. In fact, UBC recycling typically amounts to less than 30 percent of the tonnage of aluminum consumer products that are recycled.

The growth of the market for recycled aluminum scrap is due in large measure to economics. Today,“Aluminium Recycling” is cheaper, faster, and more energy efficient & it achieves higher recovery rate of aluminum than ever before. In addition, to achieve a given output of ingot, recycled aluminum requires only about 10 percent of the capital equipment compared with primary aluminum. 

 Importance of Recycling Aluminum (UBC) Cans:

Saving Energy & Achieving Carbon Credit

According to the Aluminum Association, an industry trade group, recycling just one can saves the amount of energy it takes to watch the Super bowl — in other words, the amount of energy needed to power a television for three hours.

Reducing Greenhouse Gas Emissions

In the Hall process, current passes through graphite electrodes submerged in molten alumina, or Al2O3. The carbon in the graphite electrodes reacts with the oxygen in the molten alumina to yield carbon dioxide. Although pure aluminum is isolated in the process, the amount of carbon dioxide released is considerable — more than 1 ton of carbon dioxide for every ton of aluminum produced. According to Waste Online, recycling aluminum releases only 5 percent of the CO2 required to refine fresh aluminum from bauxite. This way you will get carbon Credit by adopting recycling process.

Reducing Waste & Mining Impacts

According to the EPA, Americans threw out 3.4 million tons of aluminum in 2009 — roughly 1.4 percent of the total waste stream. Moreover, the more aluminum recycled, the less manufacturers need to produce. Production of aluminum necessitates extraction of bauxite ore, and mining also has environmental impacts. Typically bauxite is strip-mined, meaning the soil atop the deposit is removed; in the process, the vegetation at the site is destroyed.

Economic Value of Recycled Aluminum

Recycled aluminum scrap is a valuable commodity, so most recycling centers will accept your used cans. Moreover, aluminum can be recycled indefinitely — with no limit on the number of times the metal can be reused. According to the Aluminum Association, this property of aluminum gives it an extraordinarily high value as scrap. According to Waste Online, the aluminum scrap price is more cost-effective to recycle than any other metal. The EPA notes that aluminum is easy to recycle, so there’s a wide market for the recycled product.

Aluminium Recycling Process

The aluminum recycling process is fairly straightforward in its major steps. Aluminum cans (UBC) recycling, for example, is a closed-loop process, which means the new product at the end of the recycling process is the same as the source product. It goes like this:

  • The consumer throws aluminium beverage cans and foil into a recycle bin.
  • All UBC (Used Beverage Cans) are baled and formed in compact shape and size for ease of logistics.
  • In the treatment plant the aluminium is sorted and cleaned ready for reprocessing
  • The cans are shredded into small pieces and fed into a Decoater Dryer Machine to remove paint coating available on surface area of the UBC metal shreds.
  • It then goes through a re-melt process and turns into molten Aluminium Metal.
  • The molten metal from the furnace is molded and cooled into rectangular or in other type of ingots.
  • The ingots are sent to other process or flattened into thin sheets, which are then used to make new cans.
  • The aluminum ingots can be used in different sectors, including automotive, household appliances, construction, mechanics and household goods.

(Source: http://blog.alcircle.com/2013/10/17/aluminium-recycling-process-and-an-over-view-of-aluminum-scrapchip-recycling-process-plant-by-afeco-industries )

Category : Plastic

Tags : Aluminium Ingot, Aluminium Scrap Price, Aluminium UBC Scrap, Aluminium Scrap Market Trend, Aluminium Scrap Rate


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