... Limestone Powder and lump, additive in the feed Application: 200mesh: as the additive in the feed 250-300mesh: whitewash the wall,plastic,rubber,waterproof material 350 ... chemical reaction,reselection.dehydration,drying and depolymerization.It is adopted the technics of particular multi-selection and secondary depolymerization.2. ... 4980.30.4 F-0172, Limestone Powder and Lump,additive in the feed