Minerals and Coal Process Calculations: 1st Edition (Hardback) book cover

Minerals and Coal Process Calculations

1st Edition

By D.V. Subba Rao

CRC Press

332 pages

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pub: 2016-12-05
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The aim of process calculations is to evaluate the performance of minerals and coal processing operations in terms of efficiency of the operation, grade of the final products and recovery of the required constituents. To meet these requirements, in-depth detailed calculations are illustrated in this book.

This book is designed to cover all the process calculations. The method and/or steps in process calculations have been described by taking numerical examples. Process calculations illustrated in a simple and self explanatory manner based on two basic material balance equations will allow the reader to understand the contents thoroughly.

Inclusion of elaborate process calculations in every chapter is the highlight of this book. This book is unique and devoted entirely to the process calculations with sufficient explanation of the nature of the calculations. This book will prove useful to all: from student to teacher, operator to engineer, researcher to designer, and process personnel to plant auditors concerned with minerals and coal processing.


"This book is a vital asset and first of its kind in process calculations. This book meets the requirement of technocrats and engineers who are pursuing the advance studies and research."

Om Prakesh, General Manager - Engineering, Metso India Pvt Ltd.

Table of Contents

1. Minerals and coal

1.1 Types of minerals

1.2 Mineral processing

1.3 Coal

1.4 Varieties of coal

1.5 Coal processing

1.6 Problems for practice

2. Material Balance

3. Sampling

4. Size analysis

4.1 Sieve analysis

4.2 Testing method

4.3 Presentation of particle size distribution data

4.4 Particle size distribution equations

4.5 Size assay analysis

4.6 Problems for practice

5. Screening

5.1 Purpose of screening

5.2 Screen

5.3 Screen action

5.4 Material (mass) balance

5.5 Screen efficiency

5.6 Tromp curve

5.7 Problems for practice

6. Density

6.1 Solids and pulp

6.2 Retention time

6.3 Miscible liquids

6.4 Problems for practice

7. Liberation

8. Comminution

8.1 Objectives of comminution

8.2 Laws of comminution

8.3 Types of comminution operations

8.4 Problems for practice

9. Crushing

9.1 Types of crushers

9.2 Crushing operation

9.3 Open circuit and closed circuit operations

9.4 Problems for practice

10. Grinding

10.1 Grinding action

10.2 Wet and dry grinding

10.3 Grinding circuits

10.4 Problems for practice

11. Principles of settling

11.1 Laminar and turbulent flows

11.2 Fluid resistance

11.3 Terminal velocity

11.4 Free settling

11.5 Hindered settling

11.6 Equal settling particles

11.7 Settling ratio

11.8 Settling of large spheres in a suspension of fine spheres

11.9 Problems for practice

12. Classification

12.1 Classifiers

12.2 Efficiency of separation in hydrocyclone

12.3 Problems for practice

13. Beneficiation operations

13.1 Gravity concentration

13.2 Froth flotation

13.3 Magnetic separation

13.4 Electrical separation

14. Sink and float

15. Float and sink

15.1 Float and sink test

15.2 Near gravity materials

15.3 Yield reduction factor

15.4 Washability index

15.5 Optimum degree of washability (ODW)

15.6 Washability number

15.7 Effect of sizing on washability characteristics of coal

15.8 Mayer curve

15.9 Problems for practice

16. Metallurgical accounting

16.1 Two products beneficiation operations

16.2 Three products beneficiation operations

16.3 Separation efficiency

16.4 Economic efficiency

16.5 Problems for practice

17. Coal washing efficiency

17.1 Dependent criteria

17.2 Independent criteria

17.3 Problems for practice

18. Process plant circuits

18.1 Water requirements

18.2 Flotation contact time

18.3 Coal analysis and washability

18.4 Additional problems for practice

Annexure: Procedure for determination of bonds work index

Further readings

Index for calculations

About the Author

Dr. D.V. Subba Rao is retired associate professor and head of the department of Mineral Beneficiation at S. D. S. Autonomous College, (India). He has 32 years of experience at S. D. S. Autonomous College and presently serves as a guest faculty in the department of Mining Engineering at GIET, India. He has published multiple books on mineral beneficiation and has been member and chairman of academic bodies such as BOS in Mineral Beneficiation, BOS in Materials Handling and BOS in Applied Chemistry as well as the academic council and governing body of S. D. S. Autonomous College.

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