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WhatsApp: +86 18838072829WEBThe resulting Hardgrove Grindability Index (HGI) provides a measure of the energy required in a grinding process or a measure of yield for given energy input. A prepared 50g sample of No. 16–No. 30 sieve size coal and eight 1in () diameter polished steel grinding balls are placed in a stationary bowl having a machined circular track.
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WhatsApp: +86 18838072829WEBmisc{etde_, title = {Effect of media size in stirred ball mill grinding of coal} author = {Mankosa, M J, Adel, G T, and Yoon, R H} abstractNote = {As a prerequisite to producing superclean coal with any physical coalcleaning process, such as microbubble flotation, the feed coal must be micronized to liberate finely disseminated mineral matter.
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