Basic Study on the Recycling of a Waste MgO-C Refractory Material as a Flux for EAF Steelmaking

Abstract

In EAF steelmaking industries, MgO content in slag increases due to the addition of dolomite flux to protect refractory lines of furnaces and improve the desulfurization capability of slag. In addition, coal powder is injected in the molten steel bath to increase the energy efficiency of the process. In this regard, the utilization of waste MgO-C refractory material as a flux was examined because it has high amounts of MgO (>70%) and graphite carbon (>10%). A series of experiments were carried out using industrial EAF slag with added light burnt dolomite and waste MgO refractory material from a Korean steel company. The results for the addition of the two fluxes were similar in terms of slag basicity; therefore, it is expected that waste MgO-C 54 왕제필 • 김행구 • 고민석 • 이동헌

Numerical analysis and differential push‐flow structure optimization of vacuum disc drying process

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