Analysis of the force action of a gas jet on the surface of a liquid

Mordasov, M. M.; Savencov, A. P.

doi:10.1134/s1063784212030140

Tech. Phys.

2012

DOI: 10.1134/s1063784212030140

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Analysis of the force action of a gas jet on the surface of a liquid

M. M. Mordasov

A. P. Savencov

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Cited by 7 publications

(2 citation statements)

References 6 publications

(15 reference statements)

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“…The U-tube liquid manometer method has been used to study the force eff ect of the jet on the liquid [12]. The scheme of the experimental plant is shown in Fig.…”

mentioning

confidence: 99%

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Evaluating the Efficiency of Using Coherent-Type Nozzles for the Conditions of Additional Postcombustion of CO to CO2 in the Wor king Space of the Oxygen Converter

GOLUB,

MOLCHANOV,

SEMYKIN

et al. 2024

Sci. innov.

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Introduction. The requirements for the working conditions of metallurgical industry have been becoming stricter, both in terms of increasing the process indicators and in terms of environmental friendliness of processes.Problem Statement. The main controlling factor of the oxygen-converter process is the oxygen jet supplied through the nozzles of the top lance. The main task of the process is the active mixing for refi ning and the provision of conditions for the postcombustion of CO to СО2 in off -gases to additionally increase the heat content of the bath in order to enable increasing scrap processing, which improves the environmental friendliness of the process. In electrometallurgy, to solve the problem of deep mixing, it has been proposed to use nozzles of the coherent type (like a cylinder in a cylinder, through which oxidizing and protective gases are supplied).Purpose. To study and to establish the features of using nozzles of the coherent type for the conditions of top oxygen purging in the converter.Materials and Methods. Samples of laboratory nozzles of the coherent type, which diff er in the ratio of the central and peripheral parts (75, 50, 25%) with respect to the force of the jet, have been studied with the use of a modifi ed liquid manometer; by two-phase cold modeling; by evaluating the degree of afterburning of CO-containing gases in comparison with the performance parameters of an equivalent cylindrical nozzle.Results. It has been established that the force with which the jet fl owing out of the nozzle acts on the liquid is signifi cantly less when that in the case of coherent type nozzles and decreases as the share of the peripheral part of the nozzle increases. According to the results of two-phase cold modeling, it has been noted that the use of coherent type nozzles contributes to the active formation of a foamed emulsion and increases the activity of mixing two-phase liquids during top blowing. The use of the coherent-type nozzles with a peripheral part of 75% increases the postcombustion of CO-containing gases by 42.36%.Conclusions. According to the obtained results, it is possible to recommend the use of nozzles of the coherent type to replace the cylindrical nozzles of oxygen lances, which perform the function of additional sources of infl uence on the bath and for the oxidation of CO in the waste gases.

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“…The U-tube liquid manometer method has been used to study the force eff ect of the jet on the liquid [12]. The scheme of the experimental plant is shown in Fig.…”

mentioning

confidence: 99%

“…Under the action of the force (F) of the gas jet fl owing out of the nozzle, the liquid from the tube of larger diameter is displaced into the tube of smaller diameter, due to which the liquid level in the latter goes up. The force of the jet action (F) is calculated by the following equation [12]:…”

mentioning

confidence: 99%

Evaluating the Efficiency of Using Coherent-Type Nozzles for the Conditions of Additional Postcombustion of CO to CO2 in the Wor king Space of the Oxygen Converter

GOLUB,

MOLCHANOV,

SEMYKIN

et al. 2024

Sci. innov.

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Investigation into the laser polishing of an austenitic stainless steel

Xu¹,

Zou²,

Wang³

et al. 2023

Optics & Laser Technology

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CFD study on the effect of the oxygen lance inclination angle on the decarburization kinetics of liquid steel in the EAF

Ramírez-Argáez

Conejo

2021

Metall. Res. Technol.

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In Electric Arc Furnace (EAF) steelmaking the main chemical reaction is the decarburization reaction. This reaction is promoted by the injection of oxygen using supersonic or coherent jets and further chemical reaction with dissolved carbon in liquid steel at high temperatures. A 3D mathematical model to describe the effect of the injection angle, oxygen gas flow rate and number of lances on the decarburization kinetics of molten steel, in the absence of the top slag layer has been developed. The model has been validated using experimental data reported in the literature. The model shows that the decarburization kinetics is promoted by decreasing the injection angle from the horizontal, condition that improves both bath movement and reaction kinetics. These findings suggest that current injection angles in industrial EAF’s can be decreased in order to improve the decarburization rate. The main mechanism is the effect of the gas jet on the motion of the liquid. Taking into consideration that decreasing the injection angle from the horizontal promotes splashing, the numerical model predictions are employed to suggest alternative solutions in order to reach high decarburization rates.

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Analysis of the force action of a gas jet on the surface of a liquid

Cited by 7 publications

References 6 publications

Evaluating the Efficiency of Using Coherent-Type Nozzles for the Conditions of Additional Postcombustion of CO to CO2 in the Wor king Space of the Oxygen Converter

Evaluating the Efficiency of Using Coherent-Type Nozzles for the Conditions of Additional Postcombustion of CO to CO2 in the Wor king Space of the Oxygen Converter

Investigation into the laser polishing of an austenitic stainless steel

CFD study on the effect of the oxygen lance inclination angle on the decarburization kinetics of liquid steel in the EAF

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