The largest use of lime is in steel manufacturing, where it serves as a flux to remove impurities. Quicklime, both high Calcium Carbonate and Dolomitic, enjoys its most extensive use as a flux in purifying steel in the electric arc furnace (EAF) and basic oxygen furnace (BOF). Lime is particularly effective in removing phosphorus, sulfur, silica, and, to a lesser extent, manganese. Lime also has important uses in the secondary refining of steel and in the manufacture of steel products. High-calcium and dolomitic lime used in the steel industry must meet exacting physical and chemical properties.