Steel Recycling Group 3

Natalie Infante Samantha Borges

Ben Visnesky Andrew OshekaKaiwen Zhang

EDSGN 100

SPRING 2012

Introduction

ArcelorMittal sponsor company

Developing a machine that recycles steel

Cost efficiency and benefits

Satisfying the client

Design Process

Spark Test analysis and results

Chemical analysis and chromatography

Spectrometer

Railroad Junction

Water Jets

Prototype Step One: Scrap Preparation

Collect steel for placement on conveyer system

Work steel to appropriate size

Distribute steel evenly on conveyer for further examination

Step Two: Scrap Composition Analysis

Overhead emitter fires bursts of single-frequency x-rays at steel scraps

Detector analyzes time for waves to “bounce back” and changes in energy.

Computer uses data to construct digital rendering of size and composition of scraps

Step Three: Scrap Separation

Pressurized water jets “shoot” AHSS scraps onto upper conveyer, lets LCAK scraps fall onto lower conveyer

Computer uses digital rendering and conveyer speed to determine how strong water burst should be

Chemistry

Very difficult to determine for many alloys

Example – Columbium Aim: 0.004% Max Already in Steel: 0.00% HC Percentage: 66.00% Recovery Percentage: 90.00%

Calculation:0.1% Cb/Steel * 440,000 lb Heat Size = 17.6 lb Cb17.6 lb Cb / (66% HC Cb * 90% Recovery) = 29.629 lb Cb

440,000 lb Heat Size * 85% = 66000 lb

Using a mix of 44,700 lb AHSS

&21,300 lb LCAK

Resulting Cb Chemistry = 0.0022%

Conclusion

Brainstorming

Building the prototype

Working mechanisms and success of project