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Ore travels through a furnace hotter than 2500 degrees Fahrenheit. The heat drives out oxygen and other impurities, and melts the ore into nuggets the size of a small marble. |
(MPR Photo/Stephanie Hemphill)
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Ore travels through a furnace hotter than 2500 degrees Fahrenheit. The heat drives out oxygen and other impurities, and melts the ore into nuggets the size of a small marble. |
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