We Buy Plumbum Zinc Ore 6 Nov, 2021. We designed buy plumbum zinc ore, Chemical Specifiion Chemical (On dry basis), plumbum ore Guaranteed Specifiions: plumbum: 40% Min Dry basis (Rejected below 30%). Size : 0 mm 5 mm No Radioactivity is Allowed, Moisture Content is Maximum6 % Max, Free Moisture Loss At 105 Degree Centigrade: % Max, .