Hot Metal Desulphurisation Process

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.

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.

A pre-study of Hot Metal Desulphurization

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.

A Review of Modeling Hot Metal Desulfurization - Visuri ...

1 Introduction. 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, 1 using a desulfurization reagent that is either injected into the metal bath or added on top of it. 2 From the thermodynamic point of view, the fundamental requirement for the ...

Operational Costs of Hot Metal Desulphurization Processes

Iron in hot metal is trapped in the slag, and the slag sometimes contains around 50% of iron ( Gadsdon & Han, 2010) 3.3. Temperature Loss. In the Basic Oxygen Furnace (BOF) the hot metal is converted into steel using a supersonic jet of gaseous oxygen. The sensible heat of the hot metal represents around 50% of the energy input to the furnace.

Hot Metal Desulfurization_Steel Pipe knowledge_News_World ...

Hot metal pre-desulfurization (the preliminary desulphuzation of hot metal) process methods of Hot Metal Desulfurization method are many, depending on the way stirring the molten iron way and desulfurization agent can be divided into: Spreading method, shake the container method, mechanical stirring, blowing stirring method injection method ...

A Review of Modelling Hot Metal Desulphurisation - Visuri ...

Hot metal desulphurisation serves as the main unit process for removing sulphur in blast‐furnace based steelmaking. This study reviews the available body of literature on modelling hot metal desulphurisation to provide an in‐depth analysis of the approaches employed and results obtained.

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.

Hot metal treatment - SMS group

In order to ensure the efficiency and flexibility of hot metal desulphurisation, desulphurisation agents are injected in mono- or co-injection processes. For the co-injection process, a plant must have different hardware configurations.

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,

Optimal hot metal desulphurisation slag considering iron ...

Desulphurisation process In Europe and North America, the magnesium-lime co-injec-tion process is the state-of-the-art HMD process. In this process magnesium and lime are injected into the hot metal. Most of the desulphurisation (>95%) takes place by the reaction between magnesium and sulphur in the bath (reaction 1).

A Review of Modelling Hot Metal Desulphurisation - Visuri ...

Hot metal desulphurisation serves as the main unit process for removing sulphur in blast‐furnace based steelmaking. This study reviews the available body of literature on modelling hot metal desulphurisation to provide an in‐depth analysis of the approaches employed and results obtained.

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.

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 ...

(PDF) Hot metal desulphurisation simulator

Hot metal desulphurisation simulator Ville-V altteri Visuri *) and Petri Sulasalmi Process Metallurgy Research Unit, University of Oulu, PO Box 4300, FI-90014 University of Oulu, Finland.

Efficient, Economical & Ecological Hot Metal ...

for hot metal desulphurisation externally. Ladle based hot metal desulphurization is done with the help of reagents like magnesium, carbide based compounds and lime. Different types of External Desulphurization techniques are used nowadays and are frequently adopted by the steel makers. Some of the important techniques are mono-injection, co-

Lowering iron losses during slag removal in hot metal ...

To lower the iron losses of the hot metal desulphurisation (HMD) process, slag modifiers can be added to the slag. Slag modifiers decrease the apparent viscosity of the HMD slag.

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,

Desulphurization of Liquid Steel – IspatGuru

Jul 30, 2016· Process of desulphurization. Primarily, there are two options available for the removal of sulphur from the liquid steel. These are (i) by means of metal-slag reaction, where the top slag is mixed intensively with the liquid steel, and (ii) by injection of metallic calcium (Ca) into liquid steel, where a precipitation of sulphides occurs.

On-line Sulphur Immersion Sensor Improves Hot Metal ...

Table I: Input and output Hot Metal parameters at Scunthorpe Over £5 million per year is spent on iron desulphurisation, £4 million of which is reagent costs, 80% of which can be attribute d to magnesium. Therefore, it is essential that the process is operated at maximum efficiency, with minimum wastage.

Process for desulfurization of molten hot metals - The Dow ...

3. A process for desulfuring molten metal comprising: injecting a desulfurization reagent into the molten hot metal by a carrier gas via a lance immersed in said molten hot metal; said desulfurization reagent comprising magnesium nitride. 4. The process of claim 3 wherein said molten hot metal …

Steel and hot metal desulphurisation - m-tec powder GmbH

Hot metal desulphurisation as basis for various production processes Our innovative hot metal desulphurisation reagents are used in all areas of metal processing industry. Especially the production of high performance steel grades, requires cost and time saving reagents.

Optimisation of hot metal desulphurisation slag in the CaO ...

In this study, the effect of the hot metal desulphurisation slag chemistry on the separation of metal from slag was investigated for the varying hot metal desulphurisation conditions (e.g. BF slag carryover, the amount of CaO/Mg injected, hot metal temperature, etc.) via theoretical calculation and laboratory experiments.

C M Y CM MY CY CMY K from a single source – right down …

hot metal desulphurisation plant with two treatment stations. The production of high-grade steel qualities is no longer conceivable without targeted desulphurisation of the hot metal in ladles outside the blast furnace process. For hot metal desulphurisation outside the blast furnace, the dip-lance method is the most reliable and the most econom-

Optimal hot metal desulphurisation slag considering iron ...

Desulphurisation process In Europe and North America, the magnesium-lime co-injec-tion process is the state-of-the-art HMD process. In this process magnesium and lime are injected into the hot metal. Most of the desulphurisation (>95%) takes place by the reaction between magnesium and sulphur in the bath (reaction 1).

Process for desulfurization of molten hot metals - The Dow ...

3. A process for desulfuring molten metal comprising: injecting a desulfurization reagent into the molten hot metal by a carrier gas via a lance immersed in said molten hot metal; said desulfurization reagent comprising magnesium nitride. 4. The process of claim 3 wherein said molten hot metal …

Steel and hot metal desulphurisation - m-tec powder GmbH

Hot metal desulphurisation as basis for various production processes Our innovative hot metal desulphurisation reagents are used in all areas of metal processing industry. Especially the production of high performance steel grades, requires cost and time saving reagents.

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.

Delft University of Technology Desulphurisation of Hisarna ...

desulphurisation capacity of HIsarna. An industrial HIsarna will be able to produce HM with less S than is depicted in Table 1 [1], [3]. 2 Theoretical analysis 2.1 Desulphurisation with Mg and CaO The mechanism of hot metal desulphurisation (HMD) via co-injection of Mg and CaO has been well described in literature [3]–[5].

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 ...

Optimisation of hot metal desulphurisation slag in the CaO ...

In this study, the effect of the hot metal desulphurisation slag chemistry on the separation of metal from slag was investigated for the varying hot metal desulphurisation conditions (e.g. BF slag carryover, the amount of CaO/Mg injected, hot metal temperature, etc.) via theoretical calculation and laboratory experiments.

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,

Hot Metal Pretreatment can Lower Impurity Content ...

Hot metal pretreatment is a process which is performed after the tapping of a blast furnace (BF) and before decarburisation in a basic oxygen furnace (BOF). In most cases, this process lowers the impurity content of hot metal. Hot metal desulphurisation, de-siliconisation, and de-phosphorisation are processes that are included in this category.

Desulfurization of steel [SubsTech]

May 31, 2012· The most popular method of desulfurization is removal of sulfur from molten steel to the basic reducing slag. Basic slag is a slag containing mainly basic oxides: CaO, MgO, MnO, FeO. A typical basic slag consists of 35-60% CaO + MgO, 10-25% FeO, 15-30% SiO 2, 5-20% MnO. Transition of sulfur from steel to slag may be presented by the chemical equation: [S] + (CaO) = (CaS) + [O] The …

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 ...

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.

Initial Slag in Primary Desulphurisation of Hot Metal

In the theoretical part of the thesis, the most common methods for desulphurisation of hot metal are presented, as well as the main reactions and reaction mechanisms of the CaO-based reagent injection. The desulphurisation of hot metal occurs mainly as a reagent-metal reaction, but in this thesis the emphasis is on the slag-metal reaction.

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.