Scrap Shredder and Analyzer
description
Transcript of Scrap Shredder and Analyzer
SCRAP SHREDDER AND ANALYZER
Section 006 Team 3Anthony Pinter
Chase HuckesteinTim FinneganChris McElroy
Table of Contents1. Project Conceptualization2. Problem Definition3. Steel4. Types of Steel5. Design Attributes6. Weighted Objective Tree
7. Specifications8. Morphological Table9. Comparing Alternatives10. Final Design Selection11. Final Design Selection12. Final Design Mock-up
Project Conceptualization
We recognize the need to design a process that will accurately analyze and
sort scrap metal
Problem Definition ArcelorMittal is experiencing problems with
the chemical composition of the scrap metal they are using to make recycled steelThe recent increase in AHS steel use is causing
off-chemistry heats of steel and costing ArcelorMittal money
A process is needed that will prevent off-chemistry heats and allow ArcelorMittal to reutilize the alloys present the AHS steel scrap to maximize profit.
Steel Steel is an mixture consisting of iron, carbon,
and a variety of other elements called alloys1
Steel is much stronger and flexible then pure iron Fabrication of steel:
Iron is melted down and inserted into a basic oxygen furnace with carbon and other alloys
Once properly mixed, the mixture is cast into long slabs
These slabs are then extruded into sheet metal, which are rolled into bales
Steel can be heat treated to strengthen it further
1. http://en.wikipedia.org/wiki/Steel
Types of SteelAlloy Compositions
Advanced High
Strength Steel
Low Carbon
Aluminum Killed Steel
Line Pipe
Carbon 0.17% 0.04% 0.05%
Chromium 0.2% 0.1% 0.1%
Columbium 0.02% 0.004% 0.003%
Manganese 1.5% 0.2% 1.5%
Aluminum 1.2% 0.04% 0.04%
Advanced High Strength Steel (AHSS) Lightweight alloy that consists of
several elements to improve strength and flexibility
Used in automobiles Low Carbon Aluminum Killed
Steel (LCAK) Steel deoxidized with Al Consumes some of the oxygen
added to the furnace to lower temperature
Line Pipe Used to transport natural gas, oil
and water2
2. http://www.ingaa.org/cms/112.aspx
Design Attributes Recycling Process:
Efficient○ Little to no jamming
Self-lubricating parts○ Fast process
>100 tons per hour Cheap
○ Easy to purchase and install ArcelorMittal or scrapper can purchase and install Minimize space requirements
○ Recoup purchase costs in <5 years Government subsidies
Accurate○ Low scanning error rate
<2% error○ Capable of typing a variety of metals
Correctly identify alloys contained in metal
Weighted Objective TreeProject Objectives Constraints Features
Specifications The process should be able to process over 50 tons of
scrap per hour The process should have an error rate of less then 1% The process should be able to process a variety of different
scrap The process should have minimal jams The process should be as easy to install as possible The installer should be able to recoup costs in less then 5
years The process should be able to be installed at either
ArcelorMittal or the scrapyards The process should be constructed from recycled materials
Morphological TableFeatures Option 1 Option 2 Option 3
Low error rate
Automated metal scanner
Laboratory analysis
On-site chemical testing
Process >50 tons per hour
Manually move scrap as
needed
Automated conveyors
belts
Cranes and magnets to move scrap
Minimize stoppages and jams
Self-lubricated parts
Manually lubricated
parts
No additional measures
taken
Minimize space
requirementsHorizontal process
Multiple stations
spread across the warehouse
Vertical process
Constraints/Objectives
Weight(%)
Automated scanner,
automated conveyors, self-
lubricated, vertical process
Laboratory analysis,
automated conveyors, manually
lubricated, station set-up
On-site testing, cranes, self-lubricated, horizontal process
Automated scanner, manually
moved, no additional
measures, vertical process
C: Little to no jamming X
C: Fast process
C: Easy to purchase and
installC: Recoup cost in <5
yearsC: Low
scanning rate error
X
C: Type a variety of
metals
O: Efficient 30 0.6 | 18% 0.4 | 12%O: Cheap 30 0.7 | 21% 0.3 | 9%
O: Accurate 40 0.4 | 16% 0.6 | 24%Totals: 55% 45%
Final Design Selection Large metal shredder
Self-lubricates at regular intervals to reduce jamming
System of conveyor beltsTakes shredded scrap into analyzerAutomatically sorts scrap according to analyzer
results Metal analyzer determines metal
composition of each piece of scrap quickly and effectivelyError rate of 1% or less to minimize costs
Final Design Selection Entire process starts high and ends low to conserve
space, minimize cost and enable either ArcelorMittal or the scrapyards to implement the process
Maximizes use of recyclable materials in construction to reduce environmental impact
Keeps lead and other harmful materials out of the steel cycle
Minimizes cost associated with sortingDesigned to recoup costs in less then 5 yearsGovernment subsidies and grants available because
this increases the recycling of a limited resource
Design Mock-up
Questions?