Hello, this is (Ming ding mining tianjin co., LTD.) company in China. My company purchases largely iron ore powder, Iron ore, copper powder,lead ore powder,zinc powder at home and abroad. Ferric acid powder: taste 63-69, sulfur < 0.2, zinc < 0.1, titanium 0.1-3. Iron powder and alkali powder: taste 60-65, sulfur < 0.2, magnesium > 3, calcium >0.6, zinc < 0.1. Pellet iron ore, above 62, Sulfuric acid double 0, titanium <1, drum >85 Copper concentrate (copper ore) : copper >15 , arsenic 0.5, chlorine 1, lead 5, zinc 4, mercury 0.01, cadmium 0.1, Lead concentrate (lead