MM 4: Classification Mini Manual
     1. INTRODUCTION
         1.1 Scope
             1.1.1 What Is Classification?
             1.1.2 Why Classify?
         1.2 Representation of classifier performance
             1.2.1 Introduction
             1.2.2 Yield
             1.2.3 Recovery
             1.2.4 Classification Function
             1.2.5 Selectivity Function
         1.3 Definitions
     2. STATE OF THE SCIENCE
         2.1 Introduction
         2.2 Particle Trajectories in various flow fields
             2.2.1 Overview Of Hydrodynamic Modelling
             2.2.2 Governing Forces
             2.2.3 Terminal Velocity
             2.2.4 Influence Of Particle Shape
             2.2.5 Accounting For Turbulence
             2.2.6 Numerical Solutions
         2.3 Mathematical models
             2.3.1 Introduction
             2.3.2 Hydrocyclones
             2.3.3 Inclined Settlers
             2.3.4 Fluidised Bed Classifiers
             2.3.5 Air Classification
     3. STATE OF THE TECHNOLOGY
         3.1 Introduction
         3.2 Wet classifiers
             3.2.1 Wet Classifier Types
             3.2.2 Sedimentation Classifiers
                 3.2.2.1 Non-mechanical sedimentation classifiers
                 3.2.2.2 Mechanical Sedimentation Classifiers
                 3.2.2.3 Hydraulic Classifiers
             3.2.3 Centrifugal Classifiers
                 3.2.3.1 Mechanical Classifiers (Wet separators)
                 3.2.3.2 Hydrocyclones
         3.3 Air classifiers
             3.3.1 Types Of Air Classifier
             3.3.2 Gravitational Classifiers
                 3.3.2.1 Cross-flow or sedimentation classifiers
                 3.3.2.2 Counterflow gravity classifiers
             3.3.3 Centrifugal Air Classifiers
                 3.3.3.1 Introduction
                 3.3.3.2 Inertial classifiers
                 3.3.3.3 Free vortex classifiers
                 3.3.3.4 Rotating wall classifiers
                 3.3.3.5 Forced vortex classifiers
                 3.3.3.6 Combined system classifiers
         3.4 Feed silos
         3.5 Feed arrangements
             3.5.1 Introduction
             3.5.2 Valves
             3.5.3 Feeders
         3.6 Instrumentation and control devices
         3.7 Hazards and safety equipment
         3.8 Closed circuit operation of mills and classifiers
         3.9 Economic aspects of classifier selection and operation
     4. DESIGN PROCEDURES
         4.1 Introduction
         4.2 Empirical laws
             4.2.1 Wet Classifiers
                 4.2.1.1 Pool or sedimentation classifiers
                 4.2.1.2 Hydrocyclones
             4.2.2 Air Classifiers
                 4.2.2.1 Forced vortex classifiers
         4.3 Scale-up
         4.4 Performance evaluation
     5. RESEARCH AND DEVELOPMENT REQUIREMENTS
     6. REFERENCES
     7. APPENDIX DATABASE OF MANUFACTURERS AND SUPPLIERS

It is based on the following structure:

Part 1    Introduction
Part 2   State of the science
Part 3   State of the technology
Part 4   Design procedures
Part 5   Research and development requirements
Part 6   Appendices

Classification (MM 4) is a process of particle stream separation into two streams according to particle size. The chosen or specified size is known as the cut point. In practice the ideal of a unique cut point is not achieved and invariably some fine particles will join the coarse size stream and vice versa. The major application of classification arises in comminution processes. It is often expedient to separate the coarse, oversize material from the mill product stream so that it can be recycled for further breakage. In this respect classification helps to ensure product quality, by helping to achieve the desired particle size and consistency. The volume has 6 main sections:

Section 1 - Introduction

Section 2 - State of the science

Section 3 - State of the technology

Section 4 - Design procedures

Section 5 - Research and development requirements

Section 6 - Appendices.