element Ore industry type Grade Remarks Boundary grade Industrial grade Black metal minerals Iron TFe (%) Magnetite 20 25 Hematite ore 25 28-30 Siderite ore 20 25 Limonite ore 25 30 manganese % Manganese oxide Manganese-rich mine I 35 40 II 30 35 III 18 30 Manganese-poor ore 10-15 18 Iron manganese ore I 20 25 II 15 20 III 10 15 Manganese carbonate Manganese-rich ore Manganese-poor ore Iron manganese ore 15 10 10 25 15 15 Manganese-bearing limestone 8 12 chromium % Primary mine Rich mine Lean mine ≧25 ≧5-8 ≧32 ≧8-10 Sand mine ≧1.5 ≧3 titanium Primary ore TiO 2 % Rutile 1 1.5 placer (mineral kg / m 3 Rutile ≧1 ≧1.5 Ilmenite ≧10 ≧1 vanadium Independent deposit V 2 O 5 % 0.5 0.7 Associated deposit V 2 O 5 % ≧0.1-0.5% Non-ferrous metal minerals copper Cu% Sulphide ore Pit mining 0.1-0.3 0.4-0.5 Dew 0.2 0.4 Oxidized ore 0.5 0.7 lead % Sulfide ore 0.3-0.5 0.7-1.0 Mixed mine 0.5-0.7 1.0-1.5 Oxidized ore 0.5-1.0 1.5-2.0 Jeep Wrangler Tj,Jeep Tj Headlights,Jeep Jk Led Headlights,Jeep Wrangler Tj Accessories Danyang Weisheng Automotive Technology Co., Ltd , https://www.dywizsinparts.com