Selection and Sizing of Magnetic Concentrating Equipment; Plant Design/Layout

摘要

Over the last decade, magnetic separation has become prevalent in the minerals industry due to advancements in the design and application of magnetic separators. Recent technological advancements in the field of magnetic separation were developed through two different avenues of approach. First, precise magnetic circuit modeling and optimization is now carried out on the computer using sophisticated multi-dimensional finite element analysis. This technique is applied to the design of both permanent and electromagnetic circuits. As a consequence, essentially any type of magnetic separator can be developed (or redesigned) with a very high level of confidence and predictability. Second, the recent development of rare earth permanent magnets has revolutionized the field of magnetic separation. The advent of rare earth permanent magnets in the 1980's provided a magnetic energy product an order of magnitude greater than mat of conventional ferrite magnets. This has allowed the design of high-intensity magnetic circuits operating energy free and surpassing the strength and effectiveness of electromagnets. New applications and design concepts in magnetic separation have evolved. New types of magnetic separators have been developed making many older style separators obsolete. This paper is an attempt to provide an overview of the available technology for production plant design. Specific applications will be discussed as well as the design fundamentals for the basic types of magnetic separators. Guidelines are also provided for sizing and selection of magnetic separation equipment.