Particle Size Enlargement - 1st Edition - ISBN: 9781483256665, 9781483275079

Particle Size Enlargement

1st Edition

Authors: C. E. Capes
Editors: J. C. Williams T. Allen
eBook ISBN: 9781483275079
Imprint: Elsevier
Published Date: 1st January 1980
Page Count: 204
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Description

Handbook of Powder Technology, Volume 1: Particle Size Enlargement is the first of a series which will together form a Handbook of Powder Technology, primarily intended for engineers and scientists working in industry. The scope of the Handbook can be defined as being concerned with that part of chemical engineering which deals with processes involving the handling and treatment of material in solid particulate form. This book deals with methods used to create larger entities from fine particles so that the bulk properties of particulates can be improved. These so-called ""size enlargement"" methods evidently concern a broad spectrum of technical disciplines and industries ranging from the relatively small scale requirements of pharmaceutical manufacturers through the tonnage requirements of the fertilizer and minerals processing industries. A primary objective in preparing this book was to present a generalized account of the many size enlargement techniques scattered throughout these diverse industries, with emphasis on similarities and unifying characteristics whenever possible. The book devotes one chapter to each of the principal methods used to bring particles together into agglomerates: agitation methods— tumbling agglomeration, agitation methods—mixer agglomeration, pressure methods, thermal methods, spray and dispersion methods, and agglomeration from liquids.

Table of Contents


Editor's Preface

Author's Preface

Chapter 1. Introduction

1. Objectives of Size Enlargement

2. Historical Perspective

3. Classification of Methods and Scope of the Book

4. Selection of Size Enlargement Methods

5. Literature of Size Enlargement

References

Chapter 2. Agglomerate Bonding

1. Bonding Mechanisms

2. Theoretical Tensile Strength of Agglomerates

2.1. Particle Assembly with Localized Bonding

2.2. Particle-Particle Bonds

2.3. Intermolecular and Long-Range Bonds

2.4. Mobile Liquid Bonding

3. Strength Testing

3.1. Tensile Testing

3.2. Compressive Testing

3.3. Other Tests of Agglomerate Strength

4. Experimental Aspects of Agglomerate Bonding

4.1. Tensile Arid Compressive Strengths

4.2. Typical Agglomerate Strengths

4.3. Binders and Lubricants

4.4. Uniformity of Bonding

4.5. Bond Distribution and the Size-Strength Relationship

References

Chapter 3, Agitation Methods — Tumbling Agglomeration

1. Fundamental Aspects

1.1. Agglomerate Nucleation and Growth

1.2. Influence of Agglomerate Strength: Maximum Feed Particle Size

1.3. Bridging Liquid Requirements

1.4. Kinetics of Growth

1.5. Agglomerate Size Distributions

2. Equipment

2.1. Inclined Discs

2.2. Drum Agglomerators

2.3. Comparison of Drums and Inclined Discs

References

Chapter 4, Agitation Methods — Mixer Agglomeration

1. Horizontal Pans

2. Pugmills

3. High Speed Shaft Mixers

4. Powder Blenders and Mixers

5. Falling Curtain Agglomerators

6. Continuous Flow Mixing Systems

References

Chapter 5. Pressure Methods

1. The Compaction Process

1.1. Mechanism of Compaction

1.2. Compaction Aids

2. Equipment

2.1. Pis Ton-Type Presses

2.2. Roll-Type Presses

2.3. Extrusion Presses

References

Chapter 6. Thermal Methods

1. Sintering and Heat Hardening (Or Induration)

1.1. Process Mechanism and Scope

1.2. Sintering Equipment

1.3. Heat Hardening Equipment

2. Nodulizing

3. Drying and Solidification

3.1. Drum Dryers and Flakers

3.2. Endless Belt Systems

References

Chapter 7. Spray and Dispersion Methods

1. Spray Drying

1.1. Spray Dryer Designs

1.2. Spray Drying and Size Enlargement

2. Prilling

2.1. Design Considerations

2.2. Tower Size

3. Fluid Bed Spray Granulation

3.1. Process Description

3.2. System and Operating Variables; Factors Affecting Product Size

3.3. Design and Performance Information

4. Spouted Bed Granulation

5. Pneumatic Conveying or Flash Drying

References

Chapter 8. Agglomeration in Liquid Media

1. Introduction

2. Agglomeration by Immiscible Liquid Wetting

2.1. General Characteristics

2.2. Processes and Equipment

3 . Agglomeration by Polymeric Flocculants

4. Dispersion in Liquid Phase

Appendix. List of Suppliers of Size Enlargement Equipment

Author Index

Subject Index

Details

No. of pages:
204
Language:
English
Copyright:
© Elsevier 1980
Published:
Imprint:
Elsevier
eBook ISBN:
9781483275079

About the Author

C. E. Capes

About the Editor

J. C. Williams

Affiliations and Expertise

Department of Veterinary Science, Louisiana State University, Baton Rouge, LA, USA

T. Allen