According to the report, in the past 25 years, the content of Cu in carbon steel increases by 20%, the content of nichrome increases by 1. 2 times, and the content of tin increases by 2 times in U.S.A.. So it will be very difficult for simply using scrap steel to improve the quality of steel-making, but to use direct reduced iron (sponge iron) partly could avoid these questions. So it is very important to use direct reduced iron (sponge iron) when smelting high-quality steel and special steel, such as smelting petroleum casing tube, steel for automobile, nuclear power station and military affairs and so on. We can also say to produce special steel and high-quality steel must be used direct reduced iron (sponge iron).
Therefore, direct reducing iron (Sponge Iron) is the indispensable material for smelting high-quality steel and special steel, it is the high-quality material of electric stove to supply scrap steel is deficiency, and it also can be used as refrigerant of converter steelmaking and powder metallurgy.Previous [1] [2]
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