Hardgrove grindability index
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Hardgrove grindability index[′här‚grōv ‚grīn·də′bil·əd·ē ‚in‚deks]
The relative grindability of ores and minerals in comparison with standard coal, chosen as 100 grindability, as determined by a miniature ball-ring pulverizer. Also known as Hardgrove number.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.