Adhesion Of Dust And Powder

Adhesion of Dust and Powder (SECOND EDITION) Adhesion of Dust and Powder (SECOND EDITION) Anatolii D. Zimon All-Union Scientific-Research Institute of the Food Industry Moscow, USSR Translated from Russian by Robert K_ Johnston CONSULTANTS BUREAU· NEW YORK AND LONDON Library of Congress Cataloging in Publication Data Zimon, Anatolii Davydovich. Adhesion of dust and powder. Translation of Adgeziia pyli i poroshkov. Includes index. 1. Adhesion. 2. Dust. 3. Powders. I. Title. QC183.Z5131980 541.3'453 80-16154 This translation, based on the second edition is revised and enlarged from the original Russian text, and is published under an agreement with the Copyright Agency of the USSR (VAAP). A)1;rE3IIH IIhIJIH II IIOPOIDKOB Adgeziya pyli i poroshkov © 1982 Consultants Bureau, New York Softcover reprint of the hardcover 1st edition 1982 A Division of Plenum Publishing Corporation 233 Spring Street, New York, N.Y. 10013 All rights reserved ISBN-13: 978-1-4615-8578-7 e-ISBN-13: 978-1-4615-8576-3 DOl: 10.1007/978-1-4615-8576-3 Preface to the Second Edition The first edition of this monograph [5] aroused detmite interest on the part of readers, both in the USSR and in other countries [6]. In the time since the publication of this monograph, research on dust and powder adhesion has continued and broadened. The author's research has been directed toward analysis of adhesive interactions when roughness and other surface properties are taken into account, the characterization of adhesion of irregularly shaped particles, the relationship between the structure of the boundary layer and the conditions of particle detachment by an air stream, and a number of other questions. In the USSR and other countries, many papers have appeared that examine both theoretical and applied questions in the adhesive interaction of particles. Certain questions on particle adhesion are considered theoretically in the monograph of Deryagin, Krotova, and Smilga [7]. The abundance of new material on the theory and practice of adhesive interaction has made it necessary to eliminate from the present edition a number of topics in particle adhesion. These matters have either been examined by the author in more detail in other monographs or have acquired independent importance. The wetting of powders, for example, was discussed in detail in [8]. A quantitative evaluation of the removal of various contaminants was given in the author's monograph [9]. A new field of research has split off in the area of particle autohesion and the strength of granular or friable materials. Excluded from the present monograph is any discussion of coatings formed from an adherent layer of powder since such coatings may be described in terms of the general phenomena involved in film adhesion. All these circumstances have impelled the author to update the content of the monograph, to eliminate the material that is no longer within the scope of the book, and to rearrange the contents. The following are examined as independent questions: the molecular component of adhesive force (Chapter II); the influence of surface and particle properv vi PREFACE TO THE SECONO EDITION ties on adhesion (Chapter V); and the detachment of particles by an air stream (Chapter X). The other chapters have undergone substantial revision: New material has been introduced, and topics such as autohesion, wetting, film adhesion, and surface washing have been eliminated. The expansion of research on adhesive interaction has led to many joint endeavors with students and followers; the author gives special thanks to G. A. Serebryakov, K. A. Lazarev, E. I. Andrianov, E. I. Dergunov, and E. A. Ronginskii. Many years of creative cooperation bind the author to the staff of the Omsk Branch of the Frunze Pol