Aluminum Recycling explores the technology and processing strategies required to convert scrap aluminum and its alloys into new aluminum products and mixtures.

Features:

• Describes commonly used aluminum alloys to explain how the product mixture impacts recycling strategies
• Categorizes aluminum scrap by type to show how different materials affect the selection of processing technology
• Explores both scrap beneficiation and melting technology-two concepts rarely grouped together in one book
• Compares the advantages and disadvantages of dross processing options
• Examines various safety and environmental practices, including automation and charging

Contents

Introduction

• A Brief History of Aluminum Recycling
• Advantages (and Challenges) of Recycling

The Ore Body

• The Wrought Aluminum Alloy System
• The Cast Aluminum Alloy System
• The Product Mix

Scrap Collection

• The Materials Life Cycle
• Scrap Collection Practice

Aluminum Rececling Economics

• History of Aluminum Production
• Production of Primary Aluminum
• Uses
• Aluminum Recycling
• Recycling of Used Aluminum Beverage Cans
• Aluminum Recycling: An Economic Perspective

Beneficiation Technology

• Comminution
• Separation
• The Alloy Separation Problem
• Thermal Processing
• Agglomeration

Beneficiation Practice

• New Scrap
• Municipal Solid Waste
• UBCs and Other Packaging
• Automotive Scrap
• Electrical and Electronic Scrap

Melting Furnace Fundamentals

• Heat-Transfer Kinetics
• Combustion
• The Chemistry of Fluxing
• Refractory Interactions

Melting Furnace Parts and Accessories

• Burners
• Recuperators
• Refractories
• Stirring
• Environmental Equipment

Fossil-Fuel Furnaces

• Single-Chamber Designs
• Multiple-Chamber Furnaces
• Small-Volume Melters
• Rotary Furnaces
• Holding and Dosing Furnaces

Electric Furnace Melting

• Induction Furnaces
• Resistance Furnaces

The Recycling Industry

• Who Recycles Aluminum?
• Influences on the Aluminum Recycling Industry

Metal Refining and Purification

• Common Impurities in Molten Aluminum
• Fundamentals of Impurity Removal
• Refining Strategy

Dross Processing

• Types of Dross
• Processing Options for Dross

Safety and Environmental Considerations

• Collection and Beneficiation
• Thermal Processing and Melting
• Responses to Hazards

Index

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