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magnetic roasting

American  

noun

Metallurgy.

  1. roasting of a nonmagnetic ore to render it magnetic so that it can be separated from gangue by means of a magnetic field.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.