Abstract
The foaming process is an important part of the electric arc furnace (EAF) steelmaking process. It can promote thermal efficiency and reduce refractory consumption. FeO is a key material used during the foaming process. Unlike with other components used in forming foaming slag, the amount of FeO can be controlled by oxygen or carbon injection. Therefore, adjusting the content of FeO is the most economical foaming mode adopted for the EAFs steelmaking process. In this study, the influence of FeO content on the physical properties of slag was discussed. The melting temperature of the slag was evaluated using three methods: viscosity experiment, using Thermo-Calc simulation software, and high-temperature optical method. The experimental results revealed that the viscosity of slag increases as FeO content decreases. The results also revealed that foam height ratio exhibited a positive correlation with the viscosity of slag.
Highlights
Content on Foaming and ViscosityThe electric arc furnace (EAF) steelmaking process involves the consumption of high amounts of electric energy
Bhoi et al [11] reported that FeO reduction could increase the viscosity of slag and promote foaming ability
The effects of some of these factors on the slag foaming process have been previously investigated, only a few studies have reported the influence of viscosity changes on the foaming process
Summary
The electric arc furnace (EAF) steelmaking process involves the consumption of high amounts of electric energy. The foaming process can remove oxygen from FeO present in slag It can increase the recycling rate of iron. The main factor affecting the foaming process is CO gas generated during melting It is produced when the carbon content of steel reacts with FeO in slag. Bhoi et al [11] reported that FeO reduction could increase the viscosity of slag and promote foaming ability. The effects of some of these factors on the slag foaming process have been previously investigated, only a few studies have reported the influence of viscosity changes (with calcium silicate solidified phase particles) on the foaming process. Few researchers have analyzed the experimental data and described in detail the effect of viscosity and foaming on the slag foaming process [11,14,15]. This work aims to discuss the effects of viscosity changes and solidified particles on the slag foaming phenomenon
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