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 vathttp://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

Scra

p

ente

r

s

Elements heat chamber to 1415 C

Scrap moves with belt

Hig

h al

loye

d st

eel

mel

ts a

nd fal

ls

thou

gh

Low a

lloye

d

steel f

alls in

to

vat

Higher densit

y,

higher allo

yed, s

teel

is re

moved

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