Environmental Benefites of Aluminum Recycling
Aluminium is infinitely recyclable
making it the material of choice for balancing the demand of a growing economy
with the need to preserve the environment.
Since the first industrial production of aluminum in the 1880s, 75% of all material produced is still in use today
Aluminium recycling provides significant energy savings
in multiple sectors:
Recycling aluminum requires 95% less energy, and produces 95% fewer greenhouse gas emissions (GHG), than manufacturing primary aluminum. That is a GHG saving equivalent to taking 900,000 cars off the road for 12 months.
Recycling aluminum requires 95% less energy, and produces 95% fewer greenhouse gas emissions (GHG), than manufacturing primary aluminum. That is a GHG saving equivalent to taking 900,000 cars off the road for 12 months.
Today, the global aluminium recycling
industry prevents close to 170 million tonnes of GHG from entering the
environment every year.
Recycling 1 tonne of aluminium avoids
the emission of about 9 tonnes of CO2 emissions – just 1 tonne of CO2 is
equivalent to driving nearly 3,000 miles.
Recycling aluminium reduces the use
of natural resources and chemicals (caustic soda, aluminum fluoride and lime)
and eliminates the need for bauxite ore to be mined.
How To Recycle Aluminum
Can Shredding
In the first step, bales of aluminum cans are shredded into pieces the size of a walnut in a 1,000-horsepower shredder. The shreds are then passed through a magnetic drum separator to remove any steel that may have been mixed into the bale.
In the first step, bales of aluminum cans are shredded into pieces the size of a walnut in a 1,000-horsepower shredder. The shreds are then passed through a magnetic drum separator to remove any steel that may have been mixed into the bale.
De-coating
Following the can shredding process, any lacquer or paint on the aluminum is removed by blowing hot air (around 550°C) through the shreds on a slowly moving insulated conveyor. The exhaust gases from this process are first passed through an afterburner and then used to heat incoming process air via a heat exchanger, minimizing the energy requirements of the system.
Following the can shredding process, any lacquer or paint on the aluminum is removed by blowing hot air (around 550°C) through the shreds on a slowly moving insulated conveyor. The exhaust gases from this process are first passed through an afterburner and then used to heat incoming process air via a heat exchanger, minimizing the energy requirements of the system.
Melting
After being de-coated, the aluminum shreds are then fed into melting furnaces containing submerged stirrers that create a vortex in the pool of molten aluminum and drag the shreds quickly down into the melt. This process achieves rapid melting rates and high yields.
The furnaces have fuel-efficient, state-of-the-art regenerative burners and burner management systems to reduce the amount of energy used and the impact on the environment. They are also equipped with permanent magnet stirrers, which ensure an even temperature and composition by promoting metal circulation within the furnaces. The stirring process ensures the highest-quality end product.
After being de-coated, the aluminum shreds are then fed into melting furnaces containing submerged stirrers that create a vortex in the pool of molten aluminum and drag the shreds quickly down into the melt. This process achieves rapid melting rates and high yields.
The furnaces have fuel-efficient, state-of-the-art regenerative burners and burner management systems to reduce the amount of energy used and the impact on the environment. They are also equipped with permanent magnet stirrers, which ensure an even temperature and composition by promoting metal circulation within the furnaces. The stirring process ensures the highest-quality end product.
Aluminum Casting
The molten metal is transferred into a holding furnace, where it is treated to remove impurities before casting the aluminum. Ingots are cast by tilting the holding furnace and pouring the molten metal into a casting unit. The metal is treated in a two-stage process to remove any remaining microscopic non-metallic particles and gases, with chemical composition and metal cleanliness tested on each cast.
As the metal flows into the molds, it is chilled by jets of cool water pumped around and through the base of the mold. The aluminum ingot solidifies gradually during the casting process, which takes approximately three hours. The finished 18-ton ingots, each containing approximately 1.5 million used cans, are shipped to a mill for rolling into the sheet from which aluminum can makers subsequently produce new cans and the whole process begins again.
The molten metal is transferred into a holding furnace, where it is treated to remove impurities before casting the aluminum. Ingots are cast by tilting the holding furnace and pouring the molten metal into a casting unit. The metal is treated in a two-stage process to remove any remaining microscopic non-metallic particles and gases, with chemical composition and metal cleanliness tested on each cast.
As the metal flows into the molds, it is chilled by jets of cool water pumped around and through the base of the mold. The aluminum ingot solidifies gradually during the casting process, which takes approximately three hours. The finished 18-ton ingots, each containing approximately 1.5 million used cans, are shipped to a mill for rolling into the sheet from which aluminum can makers subsequently produce new cans and the whole process begins again.
RUNSUN Aluminum Scrap Recycling System
RUNSUN’s Aluminum Scrap Recycling System provides a very efficient and effective technology for scrap recycling with minimum human interference. It is one of the best technology Available in the world for various type of light gauge scrap melting in which the material will be fed into the side well Melting Furnace after shredding and d- coating process. In the side well furnace, liquid molten metal is circulated by the Vortex Pump & a specially designed well cavity. It will have an impact on the metal recovery yield. By pulling dry material subsurface through the vortex, Aluminium metal oxidation is minimized regardless of scrap type.
Hence Recovery rate will be increased and typically 94% max recovery will be received. And the process causes 5% to 6% melt loss, depending on the existing method. If the system is operated properly as per designed layout and controlled Metallurgy process, consistent metal recoveries of 94 %-95% can be expected. And For maximum recovery, salt flux must be required.
Capacity of plant:
Any organization or Promoter person can start a new Business with this “Aluminium Recycling Process Plant” choosing various capacity from 300 kg/hr. to 5000 kg/hr. Recycling Process.
This plant will be running 24X7 with pre decided output. The Financial Capacity of input material will be the deciding factor for Manufacturing Plant Capacity establishment.
Please clink blow image for more information of aluminum scrap recycling system:
Runsun Metallurgical Equipment Co., Ltd is
a global leader in aluminum processing industry, specialized in the design and
supply of process equipment and management of complete installations.
RUNSUN have successfully cooperated with Nippon Light
Metal(Japan), Nikkei MC Aluminum(Thailand), Nikkei Siam Aluminum(Thailand),
CHINALCO, CITIC Dicastal, GIANT ect big companies around the world.
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