ball mill

noun
a grinding mill in which the material to be ground is tumbled in a drum with heavy balls of iron, steel, or stone.

Origin:
1900–05

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World English Dictionary
ball mill
 
n
engineering a horizontal cylinder or cone in which a substance, such as a mineral, is ground by rotation with steel or ceramic balls

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Example sentences
Only a ball mill and organic acid feed system will be added.
Initially the first mill will be installed as a scrubber mill that will later be upgraded to a ball mill when treating sulfides.
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