A kyanite ore of about 33% kyanite is ground to minus-35 mesh and conditioned for 5 min with 0.8 lb pr ton sodium carbonate, 0.5 lb per ton sodium metasilicate, 0.9 lb per ton No. 2 fuel oil, and 1.1 lb per ton Pamak 4. A rougher concentrate is removed which i cleaned twice. The final concentrate analyzes 94% kyanite.
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