Oxygen atoms’ presence in molten iron produces many harmful effects, nearly all unknown to iron foundries. Steelmakers and steel foundries treat molten metal with aluminum, to tie up free-oxygen atoms, but this is counter-effective for iron casting because aluminum is associated with pinhole defects.
Oxidation losses make up a significant portion of an iron foundry’s operating costs. And, iron melting can be a simpler process when the free-oxygen atoms are under control. Knowing how to treat molten iron to minimize oxidation calls for a comprehensive analysis of ferrous metallurgy and melting processes, and a fresh approach to treatment methods.
Removing free oxygen from molten metal produces significant savings, too. It’s an easily attained goal.
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