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Mining Graphite Boron

Dec 20 1985 Several procedures were used to obtain graphite separates including hand picking flotation in acetone and heating in concen- trated HF and HC1. In addition to the natural samples a graphite doped with boron created by heating boron and boron-free graphite to- gether at 2500 C for 20 min.; Allardice and Walker 1970 was also analyzed. 3.

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