Materials Beneficiation / by Charles B. Gill.

Format:

Book

Author/Creator:

Gill, Charles B., Author.

Series:

Materials Research and Engineering

Language:

English

Subjects (All):

Materials--Analysis.

Materials.

Condensed matter.

Characterization and Analytical Technique.

Condensed Matter Physics.

Local Subjects:

Characterization and Analytical Technique.

Condensed Matter Physics.

Physical Description:

1 online resource (X, 245 p.)

Edition:

1st ed. 1991.

Place of Publication:

New York, NY : Springer New York : Imprint: Springer, 1991.

Language Note:

English

Summary:

The purpose of this book is to provide a broad, comprehensive, up-to-date coverage of current beneficiation techniques and processes that are used for both metallic and nonmetallic minerals; and for other materials, such as household and industrial solid wastes, that are also processed by conventional beneficiation methods in their standard methods of recycling and reclamation. Conservation of natural resources is an adjunct of beneficiation in that we have used up once-available deposits of high-grade ores, leaving only the low-grade deposits that must be beneficiated to upgrade them to sufficiently high levels for processing and metal recovery by current extractive technology. Conservation is also important in the reclamation and recycling of indestructible, noncorrosive materials, so that they may be recovered and reused many times over. The mainly physical, relatively uncomplicated, beneficiation treatments also save large quantities of energy, as these comparatively simple operations are all relatively low energy consumers, when compared with the later separation operations of pyro and electrical nature, which are very high energy consumers. Environmentally, both air and water pollution from beneficiation treatments are either quite low or can easily be controlled, and are gas-free and operated at ambient temperature, to make them one of the cleaner and lower polluting processes used in material treatments.

Contents:

Economic Justification

Economic Benefits

Conservation, Reclamation, and Recycling

Energy Conservation: Air and Water Pollution

Stages of Beneficiation

History of Beneficiation

References

1 Crushing

Energy Consumed in Comminution

Primary Crushers

Secondary Crushers

Hammer Mills

Stamp Mills

2 Screens and Sizing

Purpose of Screening

Vibrating Screens

Revolving Screens and Trommels

Crushing and Screening Flow Sheets

Closed Circuit

Open Circuit

3 Fine Grinding

Purpose of Fine Grinding

Main Grinding Mill Shapes

Ball Mills

Rod Mills

Pebble Mills

Autogenous Mills

Processes of Grinding and Grinding Mill Characteristics

4 Classification

Factors Influencing Settling Rates

Stokes’ Law

Newton’s Law

Free-Settling and Hindered-Settling

Classifier Categories

Air Classifiers

Concentration by Classification

Classifier Capacity

Classifier Efficiency

Classifier Costs

Classifier: Grinding Mill Circuits

5 Dewatering

Thickeners

Filtering

Types of Filters

6 Magnetic Separation

Relative Magnetic Attractions

Design Features

Types of Separators

Purification and Reclaiming

Demagnetizing

7 Electrostatic Separation

Electrostatic Separators

Electrodynamic Separators

8 Gravity Concentration

Application of Gravity Concentration

Shaking Table

Jigs

Heavy Media Separation (HMS)

Humphreys Spiral

Reichert Cone

9 Flotation

Application of Flotation

Wetability

Bubble Column Concentration

Cell Types

Flotation Circuits

Preliminary Feed Pulp Preparation

Flotation Reagents: Functions and Properties

10 Recycling

Purpose of Recycling

Recycling PlantEquipment

Treatment Methods

Treatment Processing

References.

Notes:

Bibliographic Level Mode of Issuance: Monograph

Includes bibliographical references and index.

ISBN:

1-4612-3020-9