Smelter Grade Alumina from Bauxite

This book provides a comprehensive review of the production of smelter grade alumina from bauxite ores. It emphasizes the best practices applied in the industry today but seen in a historical context with a view to future challenges and developments. The control of alumina quality is discussed in detail including the effects that alumina quality have on the aluminum smelter process with respect to environmental performance, current efficiency, and metal purity. The discussion of alumina quality will be relevant to people on the smelter side, as this is the interface between refinery and smelter. Emphasis is placed on the major steps of the Bayer Process including: digestion, clarification, precipitation, calcination, and management of water, energy, and bauxite residue. This book is a valuable resource for active, seasoned practitioners and for new engineers entering the industry.

Includes a historical summary outlining future challenges and developments Provides a wealth of example calculations, rules of thumb, useful illustrations, tables, and formulas Written by industry experts for a broad audience working in plants, engineering offices, refineries, and smelters

Autorentext

The Co-Editors of this book have a slightly different perspective on the recovery of alumina from bauxite. Benny and Fred received their technical training as MS Chemical engineers.
Benny Raahauge was employed by FL Schmidt and thus represented a manufacturer and seller of equipment used in that industry.
Fred Williams was employed by Alcoa and was assigned management responsibilities in alumina processing research, plant process engineering and running plant production.
Both individuals have conceived technical improvements to the alumina recovery process as recognized by patents and technical awards, written and presented numerous papers at international technical meetings and have served as chairmen and organizers of international technical sessions.
The authors of the individual chapters in this book are noteworthy experts from around the world in alumina manufacturing and researchtechnology.

Inhalt

1. Introduction: Primary Aluminium - Alumina - Bauxite (Benny E. Raahauge).- 2. Bauxite Mineralogy, Classification and Beneficiation (Hydro/RTA?).- 3. Bayer Process Design and Physical Chemistry (Steve Healy).- 4. Bauxite Processing - Crushing/Grinding, De-silication and Digestion (CSIRO?).- 5. De-sanding - Floculation / Sedimentation - Liquor Filtration (Tim Laros).- 6. Bauxite Residue: Washing - Dewatering (Tim Laros) and Disposal (Paul McGlade).- 7. Hydrate Precipitation (Dennis R. Audet) , Classification and Filtration (Manfred Bach).- 8. Liquor Purification and Impurity Control (Steve Healy).- 9. Water Balance, Evaporation, Heat Exchange and Co-Generation (Daniel Thomas).- 10. Alumina Production by Calcination (Benny E. Raahauge).- 11. Alumina Quality, HF Removal, Dissolution and Aluminium Purity (Stephen Lindsay).- 12. Alumina Storage and Handling Options.-13. Health, Safety and Plant Management (Carlos Suarez).- 14. Process Control, Simulation and Operator Training (NN?).- 15. Process Economics and Plant Design (Peter-Hans Ter Weer).