Thermal effects on wear and material degradation of slag pots operating in steel production

Rojacz, H.; Neacşu, Ioana Adina; Widder, Lukas; Varga, M.; Heiss, J. H.

doi:10.1016/j.wear.2015.12.009

Cited by 14 publications

(14 citation statements)

References 23 publications

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“…ρ = 2 650 kg/m 3 was used by Pandelaers et al, 28) 3 140 kg/m 3 by Ono et al, 3) 3 300 kg/m 3 by Matino et al, 9) 3 530 kg/m 3 by Engstrong, 1) and 3 200 kg/m 3 by AISE steel foundation 11th edition. (**) The heat capacity of the slag has been reported over a range of values in literature such as 1 400 J/kg.K by Rojacz et al, 44) ~800-1 400 J/kg.K by Mills et al 42) ~65-80 J/mol.K by Sun et al 27) Fig…”

Section: Lumped Parameter Model 221 Heat Transfer Modelmentioning

confidence: 97%

“…Assuming uniform temperature of the slag inside the crucible, a lumped parameter model to estimate the temporal change of the slag temperature (T) accounting for heat loss contributions from the conductive, convective and radiative heat transfer components, can be written as follows: 28) Kriskova et al 21) thermal cond. 2.0 W/mK Rojacz et al 44) heat capacity (**) 1 000 J/kgK Matino et al 9 The calculated density lies between ~3 000 and 3 200 kg/m 3 which is comparable with the published data, i.e. ρ = 2 650 kg/m 3 was used by Pandelaers et al, 28) 3 140 kg/m 3 by Ono et al, 3) 3 300 kg/m 3 by Matino et al, 9) 3 530 kg/m 3 by Engstrong, 1) and 3 200 kg/m 3 by AISE steel foundation 11th edition.…”

Section: Lumped Parameter Model 221 Heat Transfer Modelmentioning

confidence: 99%

“…Cooling behaviour in a typical industrial scale slag pot of 10 m 3 capacity made of cast-iron 44) was investigated in this study applying the same modelling approach. Three different insulating options were examined to study the effect of cooling on the floating behaviour of the 100 μm C 2 S-C 3 P particles in the slag pot, as listed below:…”

Section: Analysis Of Industrial Scale Slag Potsmentioning

confidence: 99%

See 2 more Smart Citations

Numerical Study into Gravity Separation of Phosphorus from BOS Slag during Solidification

Nguyen¹,

Mitra²,

Evans³

et al. 2021

ISIJ Int.

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Section: Lumped Parameter Model 221 Heat Transfer Modelmentioning

confidence: 97%

Section: Lumped Parameter Model 221 Heat Transfer Modelmentioning

confidence: 99%

Section: Analysis Of Industrial Scale Slag Potsmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Study into Gravity Separation of Phosphorus from BOS Slag during Solidification

Nguyen¹,

Mitra²,

Evans³

et al. 2021

ISIJ Int.

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“…In work [8], studies of temperature stresses occurring in slag bowls with a bias towards probabilistic aspects of the calculation were reported. The work also includes studies of temperature effects, thermal shock, and chemical effects on the slag bowl during operation.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determining the thermally-stressed state of motor-driven bowls for transporting liquid slag

Povorotnii,

Shcherbyna,

Zdanevych

et al. 2024

EEJET

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Slag bowls were chosen as the object of research, as important components of blast furnace, steelmaking, and ferroalloy shops of metallurgical enterprises. The main problem of operation of any slag trucks is their limited durability and frequent destruction of slag bowls. The reason for these problems is changes in the shape of the bowls during operation, manifested in the formation of narrowing places in the area of the support ring – for rail-mounted bowls, destruction of supporting pins – for rail-mounted slag trucks, or cracks in the walls. Those defects appear as a result of cyclic thermal effects of liquid slag on the bowl. Based on the results of computer simulation, it was established that the main role in the destruction of the support pins of motor-driven slag bowls belongs to temperature changes. The temperature stresses arising in the bowl are localized in the area of the slag mirror (200–250 MPa for 25L steel, 280–350 MPa for 30HML steel). The results provide grounds for improving the presented slag bowl to reduce temperature stresses in its walls and structures of the supporting trunnions. The results reported here are explained by the fact that with uneven heating of elastic bodies, temperature stresses appear, which, under certain configurations of temperature loads, lead to the destruction of structures. The findings from these studies are recommended to be used at enterprises for the design and manufacture of slag bowls, as information on the localization of dangerous places of the structure. In addition, the data presented here could be useful for metallurgical enterprises for detailed technical diagnosis of bowls in their dangerous places

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“…1) belong to the group of massive and thick-walled casts. Their shaping microstructure (during crystallization) is significantly different from the castings with smaller dimensions, which in turn consequently can lead to elements segregation and shrinkage porosity [1][2][3][4][5][6][7]. Crystallization of heavy-section casting affects the final quality of cast iron castings, because off its wall thickness and longer cooling time.…”

Section: Introductionmentioning

confidence: 99%

Shaping of Ductile Cast Iron Dedicated for Slag Ladle

Szczęsny

Kopyciński²,

Guzik³

et al. 2020

Acta Metall Slovaca

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In industrial conditions, ductile iron was prepared and two molds were made, in which a 600mm thick plate was formed. Filling system for one mold was placed vertically and for the second -horizontally. In order to obtain cooling curves, "S" type thermocouples have been placed in the mold. After cooling the casts, the samples from the fixing points of thermocouples were cut by the trepanning method. In the "vertical" cast sample shrinkage porosity was observed, while in the "horizontal" cast sample no porosity was detected. A significant difference in the recorded temperature in the center of the casts was discovered, indicating a defect in "vertical" cast.

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Thermal effects on wear and material degradation of slag pots operating in steel production

Cited by 14 publications

References 23 publications

Numerical Study into Gravity Separation of Phosphorus from BOS Slag during Solidification

Numerical Study into Gravity Separation of Phosphorus from BOS Slag during Solidification

Determining the thermally-stressed state of motor-driven bowls for transporting liquid slag

Shaping of Ductile Cast Iron Dedicated for Slag Ladle

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