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hot metal desulphurisation process 29018

EP2918688A1 Method for desulphurisation of hot metal

A process for the continuous desulphurization of a liquid iron, in which a flux-cored wire having a shell and a lining is injected into the liquid iron flowing continuously in a liquid-iron processing plant, said lining comprising a desulphurising product, characterized in that said desulfurizing product is metallic calcium, in that the lining also comprises at least one neutral element with

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Desulphurization of Hot Metal IspatGuru

Oct 16, 2013 Dip lance process is the most economical, effective and reliable method of desulphurization hot metal. It consists of pneumatic injection of fine grained desulphurization reagent into the hot metal with high dosing precision via a dispensing vessel and a refractory lined lance. For each reagent, one separate dispensing vessel is used.

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A pre-study of Hot Metal Desulphurization

4 → FeO → Fe. The hot metal from the blast furnace contains high contents of carbon, usually about 4.5%. This high content of carbon is beneficial for the desulphurization of hot metal. When tapping, the hot metal is tapped into a torpedo car, for transportation from the blast furnace to the steel shop.

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Operational Costs of Hot Metal Desulphurization Processes

In the co-injection method shown in Figure 1(c), a mixture of powdered desulphurization reagents (lime, calcium carbide or magnesium) is injected into the hot metal using an inert carrier gas, usually nitrogen, through a ceramic lance.

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A Review of Modeling Hot Metal Desulfurization Visuri

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.

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Optimization of Desulphurization Process using Lance

of the hot metal and the total injection time were the initial conditions of the model. The mathematical model was calculated by using the MATLAB program, with an algorithm based on an explicit Runge–Kutta (4) formula. The instantaneous concentration of sulfur in the hot metal in the desulfurization process was obtained.

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Hot Metal Desulphurization Carmeuse

Desulphurization of hot metal is the most economic process for removing sulphur before charging to the BOF. Metallic Magnesium is the most effective reagent for desulphurization; calcium oxide is the most cost-effective solution and the formed sulfides are very stable.

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Sulphur removal in iron- and steelmaking

Desulphurisation of HIsarna hot metal HIsarna is a new ironmaking process that is being developed at Tata Steel IJmuiden that reduces CO 2 emissions. HIsarna hot metal (HsHM) has a different composition compared to normal hot metal (HM) from a blast furnace (BF); notably much higher sulphur [1,2]. Fig 1. HM composition and temperature vs Mg

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Delft University of Technology Effect of graphite on hot

hot metal desulphurisation efficiency at an industrial process. In 2018 at Tata Steel in IJmuiden, the Netherlands, the carbon concentration in the hot metal was measured after the reagent injection, instead of being calculated assuming carbon saturation of the hot metal. This provides the opportunity to predict graphite formation during the

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Reagents for Desulphurization of Hot Metal IspatGuru

Aug 19, 2018 In the desulphurization process, powdered desulphurization reagents are injected into the hot metal through an immersed lance using an inert carrier

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EP2918688A1 Method for desulphurisation of hot metal

A process for the continuous desulphurization of a liquid iron, in which a flux-cored wire having a shell and a lining is injected into the liquid iron flowing continuously in a liquid-iron processing plant, said lining comprising a desulphurising product, characterized in that said desulfurizing product is metallic calcium, in that the lining also comprises at least one neutral element with

More

Desulphurization of Hot Metal IspatGuru

Oct 16, 2013 During the desulphurizing process, the generation of slag is proportional to the amount of reagent added to the hot metal. Also during the process, some hot metal gets trapped in the slag and gets pulled out of transfer ladle during the slag rimming. This amount is around 1 % for the co-injection process.

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Delft University of Technology Effect of graphite on hot

hot metal desulphurisation efficiency at an industrial process. In 2018 at Tata Steel in IJmuiden, the Netherlands, the carbon concentration in the hot metal was measured after the reagent injection, instead of being calculated assuming carbon saturation of the hot metal. This provides the opportunity to predict graphite formation during the

More

A Study on Desulfurization of Hot Metal Using Different

While hot metal desulfurization is a process, the sulfide capacity of a slag must be measured under equilibrium. However, the sulfide capacities are important for process control and are a measure to judge the usefulness of a slag used for desulfurization. Several studies have been done to characterize sulfide capacities on slag systems ranging

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Improving the Desulphurization in COREX Process by

The COREX process, which has many advantages, still has high and fluctuating sulfur levels in the hot metal. To overcome the desulfurization problems, several measures were proposed, and the adjustments of chemical compositions of hot metal were explained in the current study. Theoretical calculations and experimental results showed that increments in either of or both silicon and

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Lowering iron losses during slag removal in hot metal

This process was first used in the 1960s, and at present, desulfurization is the only hot metal pretreatment used in most steelmaking shops, except in some eastern Asian countries.

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Hot Metal Pretreatment an overview ScienceDirect Topics

Hot metal after KR desulfurization was charged into BOF De[Si]/[P] with a 7–10 minutes’ oxygen-blowing and a blowing intensity of 1.5–2.0 Nm 3 /t·min (a flow rate about 20,000–30,000 Nm 3 /h), for the desilication-dephosphorization pretreatment. The basicity of slag was about 2.0, and its constitution included the lime of 10 kg/t (steel) and partial BOF De[C] returned slag.

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Hot Metal Pre-treatment Facility (Kanbara Reactor; KR

It is characterized by its acceleration of the desulfurization reaction through the submersion and rotation of an impeller in hot metal, and subsequent mechanical mixing of the hot metal and desulfurizing agent. The KR process efficiently advances the desulfurization reaction by means of high-speed (approx. 120 rpm) rotation of the impeller.

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Hot Metal Desulfurization and dedusting system from

A handling system for the 130-t-hot metal ladles completed the scope of supply, including ladles, a transfer car with integrated ladle tilting device and a deslagging machine. ArcelorMittal Monlevade is an integrated steel works located in João Monlevade, 120 km

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Metallurgical Injection Technologies Metal Challenge

To be able to select the optimum process at any time and thus flexibly adapt the hot metal desulphurisation plant to the respective operating and production conditions, a comprehensive knowledge of the metallurgy of the hot metal desulphurisation process is required. Selection of the optimum process is performed by a metallurgical process computer.

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(PDF) Numerical Study on Desulfurization Behavior During

The hot metal desulfurization in Kanbara Reactor (KR) metal treatment was simulated in this study via a transient-coupled 3D numerical model of the two-phase flow, heat transfer, and particle

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KR Hot Metal Desulfurization System Steel Plantech

This process of removing impurities from molten metal in advance before charging it into a converter furnace is called hot metal preliminary processing. The KR Hot Metal Desulfurization System developed by Steel Plantech will achieve high-level desulfurization efficiency as well as contribute to a reduction of operating costs.

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ILVA orders two hot-metal desulfurization plants from SMS

The current hot-metal desulfurization project is the latest example of our continuing relationship with ILVA since the supply of two RH-OB units including a TOP-lance upgrade. Being an innovative company, SMS Mevac is constantly striving to optimize the design of its plants, its processes and technology.

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Pretreatment of hot metal SlideShare

Sep 17, 2015 Desulphurisation process • Dip lance process is the most economical, effective and reliable method of desulphurisation of hot metal. • It consists of pneumatic injection of fine grained desulphurisation reagent into the hot metal. • Nitrogen gas is normally used as a carrier gas for the desulphurization reagent.

More

Optimization of Desulphurization Process using Lance

of the hot metal and the total injection time were the initial conditions of the model. The mathematical model was calculated by using the MATLAB program, with an algorithm based on an explicit Runge–Kutta (4) formula. The instantaneous concentration of sulfur in the hot metal in the desulfurization process was obtained.

More

A Study on Desulfurization of Hot Metal Using Different

While hot metal desulfurization is a process, the sulfide capacity of a slag must be measured under equilibrium. However, the sulfide capacities are important for process control and are a measure to judge the usefulness of a slag used for desulfurization. Several studies have been done to characterize sulfide capacities on slag systems ranging

More

Improving the Desulphurization in COREX Process by

The COREX process, which has many advantages, still has high and fluctuating sulfur levels in the hot metal. To overcome the desulfurization problems, several measures were proposed, and the adjustments of chemical compositions of hot metal were explained in the current study. Theoretical calculations and experimental results showed that increments in either of or both silicon and

More

hot metal desulphurisation process

Hot metal desulphurisation stations. Hot metal desulphurisation (HMD) is effected by a powder deep injection system with refractory lined immersion lance(s). The unit consists of one or more treatment chambers withCharacteristics of the design are mono-, co- or triple-injection of desulphurisation agents. THE PROCESS. Read more

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Modern Hot Metal Desulfurization UKEssays

Modern Hot Metal Desulfurization And Dephosphorization Technologies Introduction. The purpose of phosphorus and sulfur removal is to decrease the concentration of these particles along with the undesired inclusions (oxides, borides, nitrides, carbides, and chlorides) to accomplish the final product quality requirements [5].

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Hot Metal Pretreatment an overview ScienceDirect Topics

Hot metal after KR desulfurization was charged into BOF De[Si]/[P] with a 7–10 minutes’ oxygen-blowing and a blowing intensity of 1.5–2.0 Nm 3 /t·min (a flow rate about 20,000–30,000 Nm 3 /h), for the desilication-dephosphorization pretreatment. The basicity of slag was about 2.0, and its constitution included the lime of 10 kg/t (steel) and partial BOF De[C] returned slag.

More

Pretreatment of hot metal SlideShare

Sep 17, 2015 Desulphurisation process • Dip lance process is the most economical, effective and reliable method of desulphurisation of hot metal. • It consists of pneumatic injection of fine grained desulphurisation reagent into the hot metal. • Nitrogen gas is normally used as a carrier gas for the desulphurization reagent.

More

KR Hot Metal Desulfurization System Steel Plantech

This process of removing impurities from molten metal in advance before charging it into a converter furnace is called hot metal preliminary processing. The KR Hot Metal Desulfurization System developed by Steel Plantech will achieve high-level desulfurization efficiency as well as contribute to a reduction of operating costs.

More

Hot Metal Desulfurization and dedusting system from

A handling system for the 130-t-hot metal ladles completed the scope of supply, including ladles, a transfer car with integrated ladle tilting device and a deslagging machine. ArcelorMittal Monlevade is an integrated steel works located in João Monlevade, 120 km

More

Metallurgical Injection Technology

the hot metal desulphurisation process is required. Selection of the optimum process is performed by a metallurgical process computer. The effectiveness of the process is therefore decisively determined by the “programmed process knowhow”. Due to the large number of plants already supplied,

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Metallurgical Injection Technologies Metal Challenge

To be able to select the optimum process at any time and thus flexibly adapt the hot metal desulphurisation plant to the respective operating and production conditions, a comprehensive knowledge of the metallurgy of the hot metal desulphurisation process is required. Selection of the optimum process is performed by a metallurgical process computer.

More

Frank Schrama Principal Researcher Tata Steel LinkedIn

Carbon may precipitate during the hot metal desulfurization (HMD) process as a result of carbon oversaturation because of temperature decrease. The precipitated carbon flakes form a layer between hot metal and slag. It is postulated that this carbon layer hampers desulfurization with magnesium by preventing MgS particles from reaching the slag

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STUDY ON THE BEHAVIOR OF MAGNESIUM IN MOLTEN SALT

desulfurization methods for hot metal pretreatment [1]. However, due to special properties of the magnesium metal as active alkali metal, it brings additional economic burden to the storage, transport and use process of the magnesium metal. In recent years, the development of molten salt electrochemistry has opened up new ideas for the

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Replacement of fluorspar in the desulfurization of hot metal

Ulexite, one of the less corrosive options seems highly feasible as a hot metal desulfurization reagent additive. Desulfurization with ulexite can be even better than with standard fluorspar mixtures, following the same trend presented by KEUM et al (2007). The sodalite mixture is the worst by comparison.

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