Presentation on theme: "ALLOYED STEEL SEPARATION Team 1: Rodrigo Gomez-Mendoza Namjun Kim Kristen Myatt Clark Bardman."— Presentation transcript:
ALLOYED STEEL SEPARATION Team 1: Rodrigo Gomez-Mendoza Namjun Kim Kristen Myatt Clark Bardman
SPECIFIC SCRAP SEPARATION Scrap metal separated as it enters scrap yard Piles have specific, known composition of alloyed steel Allows a more specific output of shredded scrap Later, sold to companies with more certainty of the various metals with in the scrap.
DENSITY Density of lower alloyed steel: 7.6 g/cm3. Density of higher alloyed: around 7.85 g/cm3 depending on the type of the scrap Melted in a vat together the higher density (higher alloyed) steel will be on the bottom Higher alloyed steel that sits on bottom can be tapped out, leaving the low alloyed steel behind Only steel with desired alloy content is left in vat http://hypertextbook.com/facts/2004/KarenSutherland.shtml
MELTING POINT SEPARATION Low alloyed steel melts at 1432 C High alloyed steel melts at 1415 C All scrap is placed in chamber at1415 degrees Only high alloyed steel melts off Conveyer belt will have small holes for melted high alloy steel to fall through Low alloyed steel will not melt and will continue on for processing http://www.engineeringtoolbox.com/melting-temperature-metals-d_860.html
SHAPE MEMORY ALLOY Replace aluminum and steel that are used for making cars Shape Memory Alloy is lighter and cheaper. High temperature causes them to arrange themselves into the most compact and regular pattern shape. Nitinol has two common phases High temperature form austenite: Hard and solid Low temperature form martensite: flexible & with pressure, atoms Due to the lack of manufacturing, only used in military, medical, safety, aerospace, and robotic fields. Would make scrap life cycle more closed and efficient
FINAL CONCEPT All scrap steel will be moved to the processing plant and placed on a conveyer belt in heated chamber High alloyed steel melts away, and low alloy steel stays on belt Remaining steel moves into heated vat Dense material (high alloyed steel) sinks to the bottom and is tapped out Less dense metal (low alloyed steel) will remain in the vat and can be tapped out later, ready for use
Scrap enters Elements heat chamber to 1415 C Scrap moves with belt High alloyed steel melts and falls though Low alloyed steel falls into vat Higher density, higher alloyed, steel is removed
PROS Effectively separates high and low alloyed steel Saves higher alloyed material for later use Does not require expensive machinery Not much physical labor involved
CONS Requires a decent amount of energy May be hard to setup correctly and implement Cannot process too much material at one time
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