Comparative study of inclusion removal from liquid steel in the RH and argon purging processes

Universidade Federal de Ouro Preto - UFOP, Escola de Minas, Rede Temática em Engenharia de Materiais - REDEMAT, Ouro Preto - Minas Gerais - Brasil.Universidade Federal de Ouro PretoBrasilOuro Preto, Minas Gerais, BrasilUniversidade Federal de Ouro Preto - UFOP, Escola de Minas, Rede Temática em Engenharia de Materiais - REDEMAT, Ouro Preto - Minas Gerais - Brasil.

https://orcid.org/0000-0003-1781-8418

Johne Jesus Mol Peixoto ⁴ 4 johnepeix@yahoo.com.br

Universidade Federal de Ouro Preto - UFOP, Escola de Minas, Departamento de Engenharia Metalúrgica, Ouro Preto - Minas Gerais - Brasil.Universidade Federal de Ouro PretoBrasilOuro Preto, Minas Gerais, BrasilUniversidade Federal de Ouro Preto - UFOP, Escola de Minas, Departamento de Engenharia Metalúrgica, Ouro Preto - Minas Gerais - Brasil.

https://orcid.org/0000-0002-1648-5423

Carlos Antônio da Silva ⁵ 5 casilva@ufop.edu.br

https://orcid.org/0000-0002-2100-9149

Itavahn Alves Silva ⁶ 6 itavahnufop@yahoo.com.br

https://orcid.org/0000-0002-7048-7163

E-mails: 3 marina_bcampos@hotmail.com

4 johnepeix@yahoo.com.br

5 casilva@ufop.edu.br

6 itavahnufop@yahoo.com.br

SCIMAGO INSTITUTIONS RANKINGS

Figures | Tables | Formulas

Figures (9)
Tables (2)
Formulas (2)

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Figure 1
Main dimensions of ladle and RH (mm).

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Figure 2
Mathematical simulation of the steel flow in a gas stirred ladle.

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Figure 3
Mathematical simulation of the steel flow in a RH reactor.

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Figure 4
Ratio between the inclusion counting and the initial inclusion quantity Q⁄Q_o - Heat # 1: (a) global Q⁄Q_o ; (b) according to the inclusions size.

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Figure 5
Ratio between the inclusion counting and the initial inclusion quantity Q⁄Q_o - Heat # 2: (a) global Q⁄Q_o ; (b) according to the inclusions size.

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Figure 6
Ratio between the inclusion counting and the initial inclusion quantity Q⁄Q_o - Heat # 3: (a) global Q⁄Q_o ; (b) according to the inclusion size.

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Figure 7
Ratio between the inclusion counting and the initial inclusion quantity Q⁄Q_o - Heat # 4: (a) global Q⁄Q_o ; (b) according to the inclusion size.

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Figure 8
Ratio between the inclusion counting and the initial inclusion quantity Q⁄Q_o - Heat # 5: (a) global Q⁄Q_o ; (b) according to the inclusion size.

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Figure 9
Ratio between the inclusion counting and the initial inclusion quantity Q⁄Q_o - Heat # 6: (a) global Q⁄Q_o ; (b) according to the inclusion size.

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Table 1
Materials' properties.

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Table 2
Secondary refining processes applied to the six heats.

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(1)

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(2)

Figure 1 Main dimensions of ladle and RH (mm).

Figure 2 Mathematical simulation of the steel flow in a gas stirred ladle.

Figure 3 Mathematical simulation of the steel flow in a RH reactor.

Figure 4 Ratio between the inclusion counting and the initial inclusion quantity Q⁄Q_o - Heat # 1: (a) global Q⁄Q_o ; (b) according to the inclusions size.

Figure 5 Ratio between the inclusion counting and the initial inclusion quantity Q⁄Q_o - Heat # 2: (a) global Q⁄Q_o ; (b) according to the inclusions size.

Figure 6 Ratio between the inclusion counting and the initial inclusion quantity Q⁄Q_o - Heat # 3: (a) global Q⁄Q_o ; (b) according to the inclusion size.

Figure 7 Ratio between the inclusion counting and the initial inclusion quantity Q⁄Q_o - Heat # 4: (a) global Q⁄Q_o ; (b) according to the inclusion size.

Figure 8 Ratio between the inclusion counting and the initial inclusion quantity Q⁄Q_o - Heat # 5: (a) global Q⁄Q_o ; (b) according to the inclusion size.

Figure 9 Ratio between the inclusion counting and the initial inclusion quantity Q⁄Q_o - Heat # 6: (a) global Q⁄Q_o ; (b) according to the inclusion size.

Table 1 Materials' properties.

	Density (kg.m^-3)	Viscosity (mPa.s)	Interfacial tension (N.m^-1)
Steel	7000	5.7	Steel/argon 1.54
Argon	1.623	0.04848

Table 2 Secondary refining processes applied to the six heats.

Heat	Secondary refining process
1	Argon purging process (APP)
2	Argon purging process (APP)
3	RH with chemical heating
4	RH with chemical heating
5	RH without chemical heating
6	RH without chemical heating

(1)

d_{b} = 0.35 {(\frac{G^{2}}{g})}^{0.2}

(2)

\frac{d_{[O]}}{dt} = - k_{0} [O]

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Comparative study of inclusion removal from liquid steel in the RH and argon purging processes

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[1] E-mails: 3 marina_bcampos@hotmail.com