dephosphorization of steel in ladle furnace

Dephosphorization

 · Desulphurization is usually carried out at tapping and during ladle metallurgy, as in those stages the steel is deoxidized and the slag has high basicity and low oxygen potential (low content of oxidizing components, "FeO," MnO, etc.).

RESEARCHES CONCERNING DEPHOSPHORIZATION …

2010-7-27 · electric furnace, EBT, steel, phosphor content, dephosphorization process. 1. INTRODUCTION . The reduction content of phosphor content from steel it was and will remain a concern of steel makers, indifferent of steel processing method. In Romanian steel industry are operating four main producers of

Problems of dephosphorization during steelmaking ...

2013-10-11 · The thermodynamics of tapping, dephosphorization, and out-of-furnace treatment of steel in a ladle and the related phosphorus balance are considered, and the main technological and thermodynamic parameters for decreasing the metal dephosphorization are found.

The Dephosphorization of Hot Metal outside the …

2011-7-23 · Hot metal with the phosphorus content of 0.09- 0.16 % was treated in a ladle with the dephosphorization agent consisting of LD slag and iron oxide or lime and iron oxide, and the phosphorus content of hot metal was reduced to 0.020 (9.060 % or 0.003 0.020 %, respectively.

Tecnosulfur | Desulfurization Process, …

2021-6-16 · From the Dephosphorization Station, the pig iron goes to the converters or electric furnaces of the steel mill, where it is transformed into steel. From the converters or electric furnaces, the steel goes to the ladle furnace, to the bubbling station or to chemical heating, where the synthetic slag is applied as second refining and/or the ...

Ladle Refining Furnace | Secondary Metallurgy | Doshi ...

Ladle Refining Furnace Large ladles are used in most metal-melting operations to transfer molten metal from melting furnaces to refining or pouring stations. The LRF also acts as a buffer between the steel making furnace and the continuous caster, reducing casting costs and allowing greater flexibility in steel …

(PDF) Dephosphorization strategies and modeling in …

Dephosphorization has often been defined as (%P)/[%P], i.e., the ratio of slag/steel phosphorus distribution that frequently lies around the calculated equilibrium values …

Steelmaking Technologies Contributing to Steel Industries

2019-4-3 · tion furnace, to which the hot metal is then sent. The effi-cient high-speed dephosphorization achieved by these technological developments allowed an increase in the ra-tio of hot metal for which the dephosphorization operation can be applied. At Fukuyama Works, it is now possible to apply the ZSP to of hot metal, even at the high pro-

Ladle Metallurgy – IspatGuru

2014-4-23 · Desulphurization of steel in the ladle is accompanied by a decrease in the temperature of the steel bath and hence needed reheating. Dephosphorization in ladle is needed when the phosphorus content of input hot metal during primary steel making is …

The Dephosphorization of Hot Metal outside the …

2011-7-23 · The preliminary dephosphorization method of hot metal outside the steelmaking furnace was investigated to obtain extra low phosphorus steels and to utilize the LD slag. Hot metal with the phosphorus content of 0.09- 0.16 % was treated in a ladle with the dephosphorization …

"DEPHOSPHORIZATION OF STEEL PRODUCED FROM …

2014-8-20 · The present work is an attempt at dephosphorizing the steel produced in the induction furnace route from DRI which is high in phosphorous (upto 0.096% are common). A neutral lining is provided in the induction furnace and double slagging by the addition of Calcium Aluminate, Calcium Barium Aluminate and Barium Aluminate is adopted.

The Dephosphorization Steelmaking Furnace* of Hot …

The preliminary dephosphorization method of hot metal outside the steelmaking furnace was investigated to obtain extra low phosphorus steels and to utilize the LD slag. Hot metal with the phosphorus content of 0.09- 0.16 % was treated in a ladle with the dephosphorization agent consisting of LD slag and iron oxide or lime and iron oxide, and ...

Influence of Steel Cleanliness by Ladle Furnace Processes

preparation of steel melt from solid scrap charge. Oxidation and dephosphorization processes take place in the furnace. All subsequent processes take place in the ladle, either during tapping of steel from EAF, or in the ladle metallurgy stand, where proper temperature is kept with the help of electric arc. Capacity of both EAF and ladle ...

Chrome-Alumina DVC Lining for Steel Dephosphorization …

2017-12-29 · Steel production through the induction furnace route represents about one third of the steel total manufacturing in India. The main advantages of coreless induction furnaces lie in the their high [3] versatility, the possibility to stop the furnace when necessary, the very good temperature control along

Effect of EMS on Inclusion Removal in Ladle Furnace for ...

2021-2-17 · EMS) was developed in 1965 and installed on a 30 ton ladle furnace at Ovako Steel AB in Sweden. More than 142 installations of electromagnetic stirrers for ladle furnaces (LF-EMS including ASEA-SKF) have been delivered to the steel industry worldwide including carbon steel, stainless steel, special steel and ferroalloy productions.

Simulation and Application of Top Lance with Various Tilt ...

Ladle Metallurgy – IspatGuru

Kinetic Model of Steel Refining in a Ladle Furnace

dephosphorization, has been applied to other processes. ... in order to decrease both the refining time and the final concentration of impurities in liquid steel. Keywords: ladle furnace, ...

A Hybrid Model of Steel Refining in The Ladle Furnace ...

2010-11-2 · The paper presents the concept of a new mathematical model, which has been used for the simulation of the ladle furnace steel refining process. The structure of the model contains a mathematical description of the steel stirring processes caused by the injection of argon and a thermodynamic description of the reactions occurring at the metal ...

(PDF) Dephosphorization of Steelmaking Slag

Slag generated during steel making in Basic Oxygen Furnace (BOF) is one of the major waste materials in an integrated steel plant. Generation rate of Steelmaking (LD) slag is 150-180 kg per ton of ...

Problems of Dephosphorization during Steelmaking ...

Abstract—The thermodynamics of tapping, dephosphorization, and out-of-furnace treatment of steel in a ladle and the related phosphorus balance are considered, and the main technological and thermodynamic parameters for decreasing the metal dephosphorization are found. SPELL: 1. slagless, 2. slagging

Problems of dephosphorization during steelmaking

The thermodynamics of tapping, dephosphorization, and out-of-furnace treatment of steel in a ladle and the related phosphorus balance are considered, and the main technological and thermodynamic parameters for decreasing the metal dephosphorization are found.

OPTIMALIZATION SLAG COMPOSITION IN LADLE …

2009-9-24 · During steel desulphurizing in ladle furnace is very significant influence of MnO in slag on desulphurizing capability of slag [3]. Analysis was based on parameters from electric steel plant where steel produced by electric arc furnace was in next step utilized in ladle furnace and finally casted on continuous casting machine.

Desulfurization Process, Dephosphorization, and …

The dephosphorization processes (reduction in the phosphorus content) of pig iron consist of oxidizing the phosphorus and combining it with calcium and other components, which are injected into the hot metal deeply, resulting in compounds transferred to the slag and, thus, removed from the metal. ... Next, the steel goes to the ladle furnace ...

Research on New Technology of Semi-steel …

Dephosphorization in the ladle is a new type of dephosphorization method. The water simulation experiment of semi-steel dephosphorization in 100t ladle of Chengde steel has been carried out.The best mixing time has been investigated for various process parameters of blowing oxygen lance and bottom blowing turns out to be that the best location of...

Study on the Dephosphorization of Semi-Steel in …

Combined with converter semi-steel component of Chengde steel plant, the main components of 100t ladle dephosphorization slag were calculated to propose the initial ratio of dephosphorization slag composition. The dephosphorization slag composition was then further improved by induction furnace dephosphorization.

Dephosphorization of Steels – IspatGuru

2016-8-15 · Dephosphorization of steels has become a very important metallurgical technique in steelmaking process to produce high quality steels. As the P content is controlled by the reactions in BOF, the double slag technique has generally been applied to obtain low P killed steels.

Kinetics of Steel Refining in a Ladle Furnace | Thermo ...

Kinetics of Steel Refining in a Ladle Furnace. This in-depth example shows how to set up a full kinetic simulation of steel refining in a ladle furnace using the Process Metallurgy Module in Thermo-Calc. The Process Metallurgy Module uses the Effective Equilibrium Reaction Zone model (EERZ) to simulate the kinetics of the process.

Desulphurization in a Ladle Furnace | Thermo-Calc …

About Desulphurization in a Ladle Furnace The ladle furnace (LF) fulfils many purposes in the steelmaking process. Desulphurization, which we will focus on in this example, is merely one of them. Desulphurization is usually performed by transferring sulfur (S) that is dissolved in the liquid metal to a CaO-rich slag phase, as shown in the image:

RECOMMENDED GUIDELINES FOR IRON & STEEL SECTOR …

2019-12-13 · 3.4 Secondary Steel Making (LHF / RH degasser / VD / VOD / AOD): 3.4.1 LHF : Ladle Heating Furnace ( LHF) ensures reheating of Liquid Steel, coming from BOF Ladle Furnace utilizes electric energy& graphite electrode to raise & maintain Temperature. Homogenization of liquid steel temperature and chemistry of steel through inert gas stirring.

Control of Gas Bubbles and Slag Layer in a Ladle Furnace ...

2021-2-16 · Physical System — The ladle system simulated in this paper is shown in Figure 2. The ladle inner diameter is 2.85 m, the melt height is 2.80 m and the initial slag layer thickness is 0.10 m. Different positions of the porous plug have been studied. Control of Gas Bubbles and Slag Layer in a Ladle Furnace by Electromagnetic Stirring

Study of the Incorporation of Ladle Furnace Slag in the ...

2020-10-26 · The ladle furnace slag comes from the steel industry. It is a by-product of the process of obtaining quality steel from scrap steel—more specifically, from the refining stage. In the first stage of meltdown performed in an electric arc furnace, oxidation eliminates manganese and silicon and

Parameters Affecting Dephosphorization of Stainless Steel

2015-8-2 · process of making stainless steel, cheaper scrap metal with higher phosphorus content would lower the costs. Although there is no deliberate focus on dephosphorization in ''s steel production, the dephosphorization process is taking place in the interface between the slag and the melt. [3].

An Assessment of Ladle Furnace Steel-making …

2019-12-11 · Aluminium-killed medium carbon–manganese-resulphurised microalloyed steels such as the 38MnS6 and 38MnVS6 are popular in automotive forgings. The present study explores the steel-making process, which can improve the product quality. The reactions at the secondary steel-making stages: tapping the steel, ladle alloying, vacuum degassing, post-degassing, and casting were assessed.

steel

1  · steel - steel - Ladle metallurgy: The carrying out of metallurgical reactions in the ladle is a common practice in practically all steelmaking shops, because it is cost-efficient to operate the primary furnace as a high-speed melter and to adjust the final chemical composition and temperature of the steel …