Sell my Used Samsung in Montreal for Extracting Precious Metals
Metal recovery is the most important output of recycling e-waste. All the electronic devices consist of precious and semi precious metals. These metals can be extracted from the devices during recycling and used later on for various other purposes. The waste is reduced to the minute level to be used later on. If you are still stuck with the idea of “sell my used Samsung in Montreal”, then rest assured give it someone who will recycle it to save the environment and the living beings. Montreal encourages refurbishment of old mobile phones.
The processes following which the metal recovery is done include:
· Shredding- This is also known as mechanical recycling. The electronic items are literally shredded using specialized equipment to extract metals from their body. After this is done, the materials are segregated employing vertical vibration separation, Eddy currents and magnetic field. The latest technology is used to separate iron from copper and these metals are sold for smelters and additional shredding subsequently. The less significant ones are disposed as landfills. Fine dust is another by product of the process which can be used for producing Portland cement and balance 30% of the weight. The dust particles consist of aluminium and calcium oxide with lesser amounts of lead and copper. Shredding is recommended for separating plastics from metals but is not suitable for separating PCBs from low quality metals.
· Pyrometallurgical Recovery- This is a highly technical process which entails adding concentrated copper ore to the shredded electronic waste. This is refined by using heat later on. Any kind of metal can be separated from e-waste following this process. A successful demonstration was given by Noranda process which used Copper Smelter in Canada. In this process, they treated the e-waste by adding 24% liquid copper at 1250 degree Centigrade. The process is used in converting iron, zinc and lead into oxides later separated by using silicon dioxide based slag. An anode furnace is used to refine such metals to create alloys of copper like nickel, platinum, silver, selenium, tellurium, gold and palladium containing 99.1% of the metal. Polymetallurgy is recommended for separating e-waste with high metal content. However, it is not useful for separating aluminium and other dioxins as it uses brominated flame retardants.
· Thermal Depolymerization- Decomposing organic molecules with the use of high pressure and water combined with thermal energy is the core of this method. This is usually used for making epoxies and plastic into useful oil. The solids obtained as residue from this process contains greater percentage of metals. This is a recommended process for treating e-waste consisting of high concentration of oxides.
All these processes or methods can be used for recycling electronic waste of which mobile phones are a major part and extracting metals. These metals can be used for different purposes. These are separate processes and not a chain linked to the former one. Some apt for certain kinds of e-waste while others are suitable for something else. However, the compilation does not end here. There is more to come.
