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Copper Ore Grindability Test

The grindability test is done by grinding 47 grams of clinker and 3 grams of gypsum all previously crushed to minus 14 inch in a Bleuler mill and then measuring Blaine fineness on the sample. Samples are ground for 7.5, 15, 30, 60, and 120 seconds, with the Blaine being run at a porosity of .45 for the 7.5 second grind, .47 for the 15 and 30.

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