... chemical reagent and other various fields. Such as talcum, cerium oxide, pyrophyllite, chilli powder, zinc powder, iron powder, ... , potash feldspar powder, opal powder, diantimony trioxide, zirconium oxide, tungsten carbide, copying toner, pollen, kaolin, pearl powder ... , calcium carbonate, quartz, mica, aluminum oxide, barite, graphite, magnesium powder, fire-retardant, etc. HM ...