Desulfurization of hot metal

Meichsner, W.; Peters, Kristina; Ullrich, W.; Knahl, H.

doi:10.1007/bf03355871

Cited by 5 publications

(4 citation statements)

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“…Hot metal desulfurization serves as the main unit process for removing sulfur in blast‐furnace‐based steelmaking. Hot metal desulfurization is commonly conducted in a ladle or a torpedo car, using a desulfurization reagent that is either injected into the metal bath or added on top of it . From the thermodynamic point of view, the fundamental requirement for the desulfurization reagent is to be able to donate electrons and form a new sulfide‐binding phase .…”

Section: Introductionmentioning

confidence: 99%

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A Review of Modeling Hot Metal Desulfurization

Visuri

Vuolio

Haas

et al. 2020

steel research int.

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Hot metal desulfurization serves as the main unit process for removing sulfur in blast‐furnace based steelmaking. The available body of literature on modeling hot metal desulfurization is reviewed to provide an in‐depth analysis of the approaches used and results obtained. The mathematical models for reaction kinetics have evolved from simplistic rate equations to more complex phenomenon‐based models that provide useful information on the effect of physico‐chemical properties and operating parameters on desulfurization efficiency. Data‐driven approaches with varying levels of phenomenological basis have also been proposed with the aim of achieving better predictive performance in industrial scale applications. Bath mixing has been studied using physical and numerical modeling to optimize mixing conditions in ladles and torpedo cars. The coupling of gas‐particle jets and their penetration into the liquid have been a focal point of physical and numerical modeling. In recent years, the fluid flow phenomena in mechanically stirred ladles has been studied extensively using physical and numerical modeling. These studies have focused on the fluid flow field, reagent dispersion, and bubble dispersion.

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Section: Introductionmentioning

confidence: 99%

“…Following the advent of injection metallurgy in plant practice, studies devoted to practical aspects of hot metal desulfurization using lance injection started appearing from the late 1960s onward . In lance injection, the desulfurization reagent is delivered pneumatically through a submerged lance .…”

Section: Introductionmentioning

confidence: 99%

A Review of Modeling Hot Metal Desulfurization

Visuri

Vuolio

Haas

et al. 2020

steel research int.

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“…The main purpose of hot metal desulfurization is to decrease the sulfur content of the hot metal because sulfur has a strong effect on the surface quality and mechanical properties of the end product. [1] Hot metal desulfurization is commonly conducted in a ladle or a torpedo car, [2] where a desulfurization reagent is injected into the metal bath by lance injection or added on top of it. [3] In lance injection, reagent powder is pneumatically fed through a submerged lance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Gas Forming Compounds on the Vibration of a Submerged Lance in Hot Metal Desulfurization

Pylvänäinen

Nissilä

Visuri

et al. 2023

steel research int.

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Hot metal desulfurization is the main process step for removing sulfur in blast furnace‐based steelmaking. A desulfurization reagent is pneumatically injected into the hot metal through a submerged lance causing it to vibrate. The aim of this study is to develop a mechanical vibration measurement‐based method that can detect changes in the gas‐forming properties of the reagent. The detection is performed using Elastic Net regression and eXtreme Gradient Boosting‐based classification models the classification performance of which is compared. The lance aging causes changes in its dynamic characteristics, and the disturbing effect of this is removed from the measured data of the lance vibration prior to classification by means of a developed cleaning algorithm. The best classification performance in detecting changes in the gas‐forming properties, with an area under the receiver operating characteristic curve of 0.916 and Matthews correlation coefficient of 0.699, is achieved using an Elastic Net regression‐based classification model. The results of this work serve as a basis for developing industrial applications in which the effective utilization of the excitation, such as vibrations generated by the gas formation can be utilized for process monitoring and as a soft sensor for predicting the reagent‐induced process variance.

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“…Hot metal pretreatment is an important desulfurization step in the steel production process [7]. At present, there are two methods for hot metal pretreatment nodes: the composite injection method and the Kanbara Reactor (KR) method.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Effects of Impeller Structures in Hot Metal Desulfurization Processes by Mechanical Stirring

Wang

Jia

2022

Metals

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With the increasing demand for high-quality steel, the requirements for the efficiency and stability of deep desulfurization are increasing too. The Kanbara Reactor (KR) is widely accepted around the world because of its high efficiency and economy. In order to destroy the rigid motion of molten iron in this area, two kinds of blade structures are designed and compared with traditional blades. In this study, a three-dimensional transient coupling mathematical model was established by using volume of fluid (VOF) and discrete phase model (DPM) to simulate the KR desulfurization process. The turbulence intensity of the molten iron, main vortex size and desulfurizing agent (DA) particle distributions for the three impeller models were investigated in detail. Model results showed that the staggered blade structure may improve the desulfurization efficiency of the KR process, and the desulfurization rate increases from 95.7% to 97.1% when compared with ordinary blades. The main reason for this can be attributed to the enhanced turbulence intensity of the molten iron, larger main vortex size and more uniform DA particle distributions. Plant tests also showed that the desulfurizer consumption per 1 ppm sulfur for the staggered blades was reduced by approximately 8.6%.

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Desulfurization of hot metal

Cited by 5 publications

References 0 publications

A Review of Modeling Hot Metal Desulfurization

A Review of Modeling Hot Metal Desulfurization

Effect of Gas Forming Compounds on the Vibration of a Submerged Lance in Hot Metal Desulfurization

Numerical Investigation on the Effects of Impeller Structures in Hot Metal Desulfurization Processes by Mechanical Stirring

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