PREFACE-TO-THE-THIRD-EDITION_1985_Mineral-Processing-Technology

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PREFACE TO THE THIRD EDITION 
DURING the recent recession, which has had a great impact on the 
minerals industry, the priority of many mining companies has been on 
reducing costs, particularly energy costs, rather than on innovative new 
techniques. Of major impact during this period, however, has been the 
very rapid decline in cost, and the increase in reliability of micropro-
cessors, which has led to the increasing use of automation in some 
milling processes. 
This edition has been expanded to include an introduction to 
automatic control and descriptions of some of the control strategies 
which have been adopted on various concentrators. The section on mass 
balancing has also been extended to include an introduction to statistical 
methods, which are suited to evaluation by microcomputer. 
The bibliography has been updated to include the latest references, 
and the section on froth flotation has been revised and expanded. 
I would like to thank all those people who have provided valuable 
information and assistance in the preparation of this edition. 
Particularly, I would like to thank the following: 
Gosta Diehl and Teppo Meriluoto of Outokumpu Oy, for arranging 
visits to various concentrators in Finland, and to the metallurgical 
staff of Pyhasalmi, Vihanti and Vuonos mines for invaluable dis-
cussions. 
Prof. Peter Linkson, and Dennis Nobbs of the University of Sydney, 
Australia. 
The metallurgical staff of Mount Isa Mines Ltd, Queensland, 
Australia. 
Peter Lean and the metallurgical staff of the Broken Hill mines, New 
South Wales, Australia. 
Dr. Don McKee of the Julius Kruttschnitt Mineral Research Centre, 
Brisbane, Australia. 
vii 
VÜi PREFACE TO THE THIRD EDITION 
Derek Ottley, Vice-President of Mineral Systems Inc., Stamford, 
USA. 
Dr. Bob Barley of Camborne School of Mines. 
Sydney, Australia B. A. WILLS 
26 September 1983