Gravity Separation

Arthur Pinto Chaves , Rotênio Castelo Chaves Filho

Densitary separation, a brand new title from Theory and practice of ore treatment, already acclaimed as reference in Mining, is destined to students and professionals in Mining, Environment and Engineering.

In this book the authors describe the ways to realize ore density separation and explain in each chapter the equipment, mechanisms, operational practice and auxiliary operations of separation processes. Didactic and practice, the book presents illustrations and solved exercises.

Original title
Separação densitária
978-85-79 75-070-0
Year of publication

About the authors

Arthur Pinto Chaves

Arthur Pinto Chaves is graduated in Metallurgic Engineering, has a Masters in Mineral Technology and a PhD all by Universidade de São Paulo, and a post-doctorate from Southern Illinois University. Teaches in the Department of Mine and Petroleum Engineering in Universidade de São Paulo and has worked since 1990 in the main mining and engineering in Brazil. Has practical experience in the field of Mining Engineering, with emphasis in ore treatment, mineral technology, ore beneficiation and flotation.

Author's CV.

Rotênio Castelo Chaves Filho

Rotênio Castelo Chaves Filho is a metallurgist engineer from Pontifical Catholic University of Rio de Janeiro (PUC-Rio). He has extensive experience in importante mining and engineering companies, working as laboratory chief of process research in the Indústria e Comércio de Minérios (Icomi), senior engineer at Promon Engenharia, board advisor at Mineração Taboca, partner and owner of RZ Serviços e Consultoria and project manager and minermetallurgical process at Progen. He also has experience in process equipment dimensioning, production and quality control, implementation and coordination of process control, coordination of radiological protection services, economic engineering and material handling.

1. Densitary methods

1.1 Concentration criteria

1.2 Concentration relation



2. Densitary separation characterization

2.1 “Ensaio de lavabilidade”

2.2 Organic liquids

2.3 Other ores

2.4 Coals characterization



3. Jigging

3.1 Equipment

3.2 Separation mechanism

3.3 Operational practice



4. Dense media separation

4.1 “Separação por soluções salinas”

4.2 Suspensoid use

4.3 “Meio denso autógeno”

4.4 Equipment

4.5 Auxiliary operations

4.6 Equipment dimensioning



5. “Separação em lamina d’água”

5.1 “Mecanismo de separação em lâmina d’água”

5.2 Equipment

5.3 Operational practice



6. Centrifuge separators

6.1 Knelson concentrator

6.2 Falcon concentrator

6.3 Multi-gravity separator (MGS)

6.4 Centrifuge jig



7. Partition

7.1 Partition concept

7.2 Earth models for partition curves

7.3 USBM model

7.4 Other models

Solved exercises



8. Magnetic separation

8.1 Basic concepts

8.2 Equipment

8.3 Operational practice

Solved exercises



9. Electrostatic separation

9.1 Basic concepts

9.2 Equipment

9.3 Operational practice



10. Alluvium mining and beneficiation

10.1 Heavy mineral concept

10.2 Alluvium mining

10.3 Clay balls and scrubbers

Solved exercises