The coming of age of process engineering in extractive metallurgy
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The Coming-of-Age of Process Engineering in Extractive Metallurgy
H.Y. SOHN
The increasing importance of the application of process engineering principles and techniques in extractive metallurgy is reviewed. Significant developments made in recent years in quantitatively describing metallurgical processes are discussed. Some general approaches and building blocks of process engineering are presented, together with examples related to a number of unit operations and unit processes encountered in extractive metallurgy. A considerable amount of discussion is devoted to the advances made in the engineering analysis of rate processes in metallurgical processes. The importance of the interrelationship between transport phenomena and chemical reactions in metallurgical systems, which are almost always heterogeneous in nature, are emphasized. Quantitative process description is essential for optimally designing process equipment and also for the optimization and control of existing processes. Illustrative examples cited in this article include the analysis and modeling of fluid-solid reactions encountered in pyrometallurgy and hydrometallurgy and the process modeling of flash reaction, solution-mining, and fluidized-bed processes. Examples are also given as to how new process concepts can be developed from the clear understanding of the roles of individual component processes and the interactions among them. The article then takes a brief look at the future of process engineering in extractive metallurgy and presents a proposition for the establishment of a new discipline called "value-addition metallurgy" within the process metallurgy field in response to the rapidly developing demands for value-added materials based on metals.
The Extractive Metallurgy Lecture was authorized in 1959 to provide an outstanding person in the field of nonferrous metallurgy as a lecturer at the annual AIME meeting.
H.Y. SOHN is Professor of Metallurgical Engineering and Director of The Center for Advanced Pyrometallurgical Technology at the University of Utah, Salt Lake City, UT. He is also Adjunct Professor of Chemical Engineering and of Fuels Engineering and Honorary Visiting Professor of Metallurgy of the Kunming Institute of Technology, Kunming, People's Republic of China. A native of Korea, Professor Sohn received his B.S. degree from METALLURGICAL TRANSACTIONS B
Seoul National University in 1962, his M.S. degree from the University of New Brunswick in 1966, and his Ph.D. degree from the University of California, Berkeley, in 1970, all in chemical engineering. After working as Postdoctoral Research Associate at the State University of New York at Buffalo and as Research Engineer at the Engineering Technology Laboratory of E.I. du Pont de Nemours & Company, Wilmington, DE, he joined the faculty of the University of Utah in 1974. Dr. Sohn received the Camille and Henry Dreyfus Foundation's Teacher-Scholar Award in 1977 and was a Fulbright Distinguished Lecturer in 1983. He also received the 1990 TMS Extractive Metallurgy Science Award
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