Mineral Processing Design and Operations
eBook - ePub

Mineral Processing Design and Operations

An Introduction

Ashok Gupta,Denis S. Yan

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eBook - ePub

Mineral Processing Design and Operations

An Introduction

Ashok Gupta,Denis S. Yan

Angaben zum Buch
Buchvorschau
Inhaltsverzeichnis
Quellenangaben

Über dieses Buch

Mineral Processing Design and Operations: An Introduction, Second Edition, helps further understanding of the various methods commonly used in mineral beneficiation and concentration processes. Application of theory to practice is explained at each stage, helping operators understand associated implications in each unit process. Covers the theory and formulae for unit capacities and power requirements to help the designer develop the necessary equipment and flow-sheets to economically attain maximum yield and grade.

This second edition describes theories and practices of design and operation of apparatus and equipment, including an additional chapter on magnetic, electrostatic, and conductivity modes of mineral separation. Basics of process controls for efficient and economic modes of separation are introduced.

  • Outlines the theory and practice in the design of flow sheets and operation of an integrated mineral processing plant
  • Introduces the basic magnetism, electrostatic, conductivity, and dielectrophoresis properties of minerals and related separation techniques
  • Describes automation in mineral processing plants allowing maximum yields and consistent high concentrate grades
  • Outlines problems and offers solutions in the form of various examples

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Information

Verlag
Elsevier
Jahr
2016
ISBN
9780444635921
Chapter 1

Mineral Sampling

Abstract

Proper sampling of tectonic deposits of minerals is essential to assess its economic viability of extraction. The sampling techniques used to attain this objective are described in this chapter for varying conditions such as incremental and continuous analysis for particles of different sizes, shapes, densities and for precious metals. Statistical approaches of analytical data are given to interpret results as accurately as possible.

Keywords

Random sampling
incremental sampling
continuous sampling
statistical sampling by Gy’s method

1.1. Introduction

A processing plant costs many millions of dollars to build and operate. The success of this expenditure relies on the assays of a few small samples. Decisions affecting millions of dollars are made on the basis of a small fraction of the bulk of the ore body. It is therefore very important that this small fraction is as representative as possible of the bulk material. Special care needs to be taken in any sampling regime, and a considerable effort in statistical analysis and sampling theory has gone into quantifying the procedures and precautions to be taken.
The final sampling regime adopted is, however, a compromise between what theory tells us should be done and the cost and difficulty in achieving this in practice.

1.2. Statistical Terminology

A measurement is considered to be accurate if the difference between the measured value and the true value falls within an acceptable margin. In most cases, however, the true value of the assay is unknown, so the confidence we have in the accuracy of the measured value is also unknown. We have to rely on statistical theory to minimise the systematic errors to increase our confidence in the measured value.
Checks can be put in place to differenti...

Inhaltsverzeichnis

  1. Cover
  2. Title page
  3. Table of Contents
  4. Copyright
  5. Dedication
  6. Preface to the Second Edition
  7. Symbols and Units
  8. Chapter 1: Mineral Sampling
  9. Chapter 2: Particle Size Estimation and Distributions
  10. Chapter 3: Size Reduction and Energy Requirement
  11. Chapter 4: Jaw Crusher
  12. Chapter 5: Gyratory and Cone Crusher
  13. Chapter 6: Roll Crushers
  14. Chapter 7: Tubular Ball Mills
  15. Chapter 8: Tubular Rod Mills
  16. Chapter 9: Autogenous and Semi-Autogenous Mills
  17. Chapter 10: Stirred Mills – Ultrafine Grinding
  18. Chapter 11: Mathematical Modelling of Comminution Processes
  19. Chapter 12: Screening
  20. Chapter 13: Classification
  21. Chapter 14: Solid – Liquid Separation – Thickening
  22. Chapter 15: Solid Liquid Separation – Filtration
  23. Chapter 16: Gravity Separation
  24. Chapter 17: Magnetic and Electrostatic Separation
  25. Chapter 18: Flotation
  26. Chapter 19: Metallurgical Process Assessment
  27. Chapter 20: Process Control
  28. Appendix
  29. Index