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16:05
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Originally posted by Bailey241
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I had a chat to Steve Tambanis at the Benchmark Minerals conference a few months back, he mentioned that the spheronising process only upgrades the TGC% by about 0.1% at most. My interpretation is that the occurrence of some of the impurities occurs in areas that cannot be separated using mechanical processes only (i.e. without acid or thermal purification, the spherical graphite produced from BKT feedstock is "only" 99.3%TGC, which does not meet battery grade specifications).
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Great post bailey. So BKT needs to use acid or thermal treatment prior to spheronisation because the spheronisation/milling step doesn't purify it enough.
(20min delay)