Influence of Bath Agitation Intensity on Metallurgical Characteristics in Top and Bottom Blown Converter

Kai, Tsuyoshi; Okohira, Kazuo; Hirai, Masazumi; Murakami, Syozo; Sato, Nobuo

doi:10.2355/tetsutohagane1955.68.14_1946

Cited by 22 publications

(11 citation statements)

References 2 publications

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“…At high carbon content the amount of free oxygen will be governed by the carbon‐oxygen reaction but at low carbon content the reaction between iron and oxygen will govern the amount of free oxygen 4. Figure 5a shows the relation between the carbon content and free oxygen in industrial BOF operation, which was reported by Kai et al 14, and Figure 5b shows this relation from calculated results. In the high carbon region the oxygen content which was calculated by the new model is close to that calculated from the C‐CO equilibrium reaction.…”

Section: Comparison Of Calculations With Industrial Bof Datasupporting

confidence: 62%

Simulation of Steel Refining Process in Converter

Pahlevani

Kitamura

Shibata

et al. 2010

steel research int.

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Steel refining is a complex phenomenon which depends on numerous variables, so, a kinetic approach is necessary for precise understanding of the refining process. In this study, based on a previously proposed model for hot metal dephosphorization, a new simulation model for the steel refining process in BOF is presented. In most cases, steelmaking slag is saturated with dicalcium-silicate (C 2 S) and it is well known that C 2 S forms solid solution with tricalcium-phosphate (C 3 P) in a wide composition range and the partition ratio of phosphorus between C 2 S and liquid slag is large. On the other hand, C 2 S formed around the lime surface is known as a barrier to lime dissolution into liquid slag. In this simulation model not only the effect of solid phase in slag is considered but also the effects of temperature dependence of variables as well as top and bottom blowing and scrap melting are taken into account.The calculation results are compared with industrial data and the good agreement between experimental and simulation results evidence the validity of this kinetic approach to steel refining process in BOF. Moreover, by using this model the influence of various parameters on the reaction efficiency is discussed. steel research int. 81 (2010) No. 8 Process Metallurgy Figure 8. a) Effect of Ar flow rate and b) effect of oxygen flow rate on the relation between carbon content and free oxygen.

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Section: Comparison Of Calculations With Industrial Bof Datasupporting

confidence: 62%

Simulation of Steel Refining Process in Converter

Pahlevani

Kitamura

Shibata

et al. 2010

steel research int.

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“…In table 3 the mixing-times without melting scrap reported in the literature") to 9)11)12) for basic oxygen furnace baths are compared with the mixing-time calculated by the equation (8) of the present study for their blowing conditions. The value of qm is calculated from equations (4) to (6) and the modified Froude number from the relationship (7). It can be seen in the table that the mixing-time calculated by equation (8) is higher than the mixing-time estimated by T.Kai and coworkers7)8) and K.Nakanishi and coworkers')") except for one case where the calculated mixing-time is same as that given by T. Kai and coworkers7)8).The calculated mixing time for the blowing conditions of K. Kawakami and coworkers compares well with that given by them"), As no data on mixing-time ofa…”

Section: Methodsmentioning

confidence: 99%

Mixing‐time correlation in top gas stirred melts

Koria

Lange

1984

Steel Research Intl

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“…7. Kai et al 51) proposed BOC (Balance of Oxygen and Carbon feeding rate), which is an index of the effect of [C] on (FeO) generation, as expressed in Eq. (3).…”

Section: Development and Establishment Of Top Andmentioning

confidence: 99%

Development and Prospects of Refining Techniques in Steelmaking Process

Kikuchi¹

2020

ISIJ Int.

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The development of refining techniques in the steelmaking process over the last 60 years and the prospects for the future were reviewed. In Japan, hot metal pretreatment started in the 1960s with the aim of reducing refining costs and improving quality, and its purposes have now transitioned to meeting new requirements for reduced treatment time, reuse of steelmaking slag and use of diverse iron sources. In converter refining, in addition to high speed decarburization, visualization of phenomena and sensing modeling techniques are becoming more important for combined use with data science techniques. In ladle metallurgy (secondary refining), techniques to realize high speed treatment and heating of the molten steel are key issues. The necessity of process revolution to contribute to a sustainable social environment is also discussed briefly.

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Influence of Bath Agitation Intensity on Metallurgical Characteristics in Top and Bottom Blown Converter

Cited by 22 publications

References 2 publications

Simulation of Steel Refining Process in Converter

Simulation of Steel Refining Process in Converter

Mixing‐time correlation in top gas stirred melts

Development and Prospects of Refining Techniques in Steelmaking Process

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