Influence of Recycled Wastes on Slag Foaming during EAF Steelmaking

Ismail, Anis Nadhirah; Yunos, Nur Farhana Diyana Mohd; Jamaludin, Shamsul Baharin; Idris, M.A.

doi:10.4028/www.scientific.net/msf.819.381

Cited by 4 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Horizontal tube furnace was applied for the carbothermal reduction process. The experiment setup was explained in previous works [17,18]. The argon gas was supplied at a rate of 0.1 L/min upon the process.…”

Section: Methodsmentioning

confidence: 99%

Phase Evolution during Carbothermal Reduction of Langkawi Ilmenite Ore at Different Reaction Times

Yunos

Chong

Mohammed

et al. 2020

MSF

Self Cite

View full text Add to dashboard Cite

In this research, the carbothermal reduction of Langkawi ilmenite ore, FeTiO3 had been conducted by using coke as carbon reductant. All samples were grinded into size of ≤ 63 µm and pelletized using 2.5 g mixture of ilmenite ore with coke based on C/O molar ratio of 1:3 (carbon to reducible oxygen). The carbothermal reduction was conducted in a horizontal tube furnace using 0.1 L/min of argon gas flow at temperature of 1200°C. The ultimate and proximate analysis of carbon reductant was investigated using carbon, hydrogen, oxygen, nitrogen and sulfur (CHONS) analyzer. The phase evolutions and chemical composition analysis was conducted using X-ray diffraction (XRD) and X-ray fluorescence (XRF) for raw ilmenite and reduced ilmenite with coke, respectively. The reduction time was set with 2, 3 and 4 hours to understand the phase evolutions. It was found that Langkawi ilmenite ore contained mainly higher TiO2 and hematite, Fe2O3 where the phases of FeTiO3 and titanomagnetite, (Fe2TiO4-Fe3O4) were detected using XRD. The phase of FeTiO3 evolved into the production of Fe, FeO, TiC, TiO2 and Fe3C when increased the reduction time from 2 to 4 hours. The amount of Fe2O3 production was decreased from 59.16 to 47.02 wt%, while higher value of TiO2 was obtained, increasing from 25.2 to 29.1 wt% due to the reduction of TiO2 to Ti3O5 as the reduction time increased. TiC content is also detected when the reduction time increased by reducing TiCxOy into TiC.

show abstract

Section: Methodsmentioning

confidence: 99%

Phase Evolution during Carbothermal Reduction of Langkawi Ilmenite Ore at Different Reaction Times

Yunos

Chong

Mohammed

et al. 2020

MSF

Self Cite

View full text Add to dashboard Cite

show abstract

“…On the contrary, large bubbles like soap generate unstable foam and the likelihood of slopping. Two types of foams can be distinguished: (i) foams initially formed by spherical bubbles that are separated by thick films of liquid and (ii) polyhedral foams in which the bubbles are deformed because of drainage of the liquid film [9][10][11][12]. Drainage phenomena decrease the thickness of the liquid separating film to values lower than 1 μm.…”

Section: Injected ðþ þ Feomentioning

confidence: 99%

“…Another point of interest is the foam life time, because it can vary greatly depending on the surfactant compounds present. Transient foams last for a few seconds, while stable foams have prolonged shelf life [12]. In this chapter, results of 16 BOF slags characterized for foaming practice are informed.…”

Section: Injected ðþ þ Feomentioning

confidence: 99%

Treatments and Recycling of Metallurgical Slags

Brandaleze¹,

Benavídez²,

Santini³

2019

Recovery and Utilization of Metallurgical Solid Waste

View full text Add to dashboard Cite

Steelmaking plants continuously strive to reduce the environmental load in the steelmaking process, resulting in the recycling of energy, water, and other byproducts. In this chapter, techniques for the treatment and recycling of metallurgical slags are described. Metallurgical slags are considered secondary raw materials and are used or added during the process to improve steelmaking practice. Steelmaking slag added into ladle slags makes it possible to minimize slag line wear. BOF-converter slags are also applied in buildup, foaming, or slag splashing practices carried out to prolong the lifespan of refractory lining. Also, EAF slags are commonly used to avoid refractory wear and decrease energy consumption. It is known that cement concrete is one of the most common building materials. Blast furnace crystallized slags are used in cement production, in different percentages. In this sense, understanding the properties of slags is a prerequisite to apply them in different functions. This chapter deals with the measurement and modeling of thermochemical properties of slags, thermophysical properties, and interproperty correlations. Different experimental tests applied in slag characterization are also detailed.

show abstract