Method for melting direct reduced iron, solid iron and method for producing the same, and material for civil engineering and construction and method for producing the same

Abstract

A technology for melting direct reduced iron while efficiently removing a gangue portion from the direct reduced iron includes melting direct reduced iron in an induction melting furnace to obtain molten iron, and slag removal step of removing slag to an outside of the induction melting furnace; and optionally includes a refining step of refining the molten iron obtained in the melting step. The melting step includes a first step of blowing a gas into the molten iron for a limited time of or throughout the melting step, and further optionally includes one or more steps selected from: 1) a second step of adding an adjuster for adjusting components of the slag, 2) a third step of supplying heat to the slag from a heat source disposed above the induction melting furnace, and 3) a fourth step of supplying one or more reducing solids and/or one or more reducing gases.

Dependencies are inferred from the claim text.