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Excerpt from Report of the Bureau of Mines, 1903 What is concentration 322 Reasons for concentrating iron ores 822 Methods of concentration 328 Magnetic vs. Water concentration 324 Present status of magnetic concentration 325 Types of conveying-belt separators 325 ball-norton drum machine 326 Other forms of drum separators 328 Edison stationary magnet separator 828 grondal-dolvik separator 329 Finely divided ores in blast furnace 330. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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