effect of refining slag phase composition on ladle

A Study on the Thermal State of Steelmaking Ladles

thermal conductivity values for ladle slag were used to study the effect of the slag layer on the top surface of the melt on heat transfer and fluid flow in a teeming ladle. In the first stage, the transient hot-wire method was verified to measure the thermal

Recycling of ladle furnace slags

The slag composition is designed for different grades of steel being produced with the majority requiring desulphurization. Regardless of the chemical refining requirements of slag, it is advantageous for the ladle slag to become as fluid as possible immediately

EXPLORING THE DESIGN SET POINTS OF REFINING OPERATION IN LADLE FOR COST EFFECT

steps such as ladle refining, tundish processing, continuous casting, rolling, heat treatment etc., which requires attention and proper control. Among these, ladle refining is a crucial step as it facilitates the attainment of proper composition and inclusion level in

Effect of slag basicity and oxygen potential on the distribution of boron and phosphorus between slag

overall effect of slag chemistry on impurity behaviour. Further to this, because of the relatively weak preference of boron and phosphorus for the slag phase, slag refining, if used, would be one step in a more complex overall refining programme. This paper

[PDF] Effect of Additives on Melting Point and Viscosity of

To get suitable ladle slag which can avoid slag sticking onto the RH immersion tube during RH refining process of IF steel, the effect of composition on melting point and viscosity of RH refining ladle slag was studied by different additives which is based on CaO. The results of melting point and viscosity testing experiments indicates that, the melting point and viscosity of RH refining ladle

Multiphase Mass Transfer in Iron and Steel Refining

2015/10/22Effect of the total argon flow rate on the desulfurization process. Figure 7 illustrates the effect of slag composition. Slag 1 is the one considered in Figure 5. Slag 2 has a partition coefficient of 52. An increase in the partition coefficient leads to a pronounced

USE OF ALUMINIUM DROSS FOR SLAG TREATMENT IN SECONDARY STEELMAKING TO DECREASE AMOUNT OF REDUCIBLE OXIDES IN LADLE

2.17. Effect of FeO + MnO Content in Ladle Slag on Lowering Dissoloved Al (from ladle to mold) and from (ladle to tundish) and on Increasing Alumina Content (measured in tundish)..34 2.18. Correlation of FeO Content in

Effect of basicity and Al 2 O 3 on viscosity of ferronickel smelting slag

Effect of basicity and Al 2 O 3 on viscosity of ferronickel smelting slag Yong-feng Chen 1, Xue-ming Lv 2, Zheng-de Pang 3,4, Xue-wei Lv 3,4 1 Wuhu Xinxing Ductile Iron Pipes Co., Ltd., Wuhu 241000, Anhui, China; 2 Pangang Group Research Institute Co., Ltd

Treatment of LF slag to prevent powdering during cooling

slag of TSL causes the powdering of the slag. The average composition of this high basicity LF slag is 55-62% CaO, 23-27% SiO 2 and 5-7% Al 2 O 3. In the present investigation an attempt has been made to prevent crumbling of ladle furnace slag by adding

Effect of slag basicity adjusting on inclusions in tire cord

2017/9/11Effect of slag basicity adjusting on inclusions in tire cord steels during ladle furnace refining process Changbo Guo 1,2, Haitao Ling 1, Lifeng Zhang 1 *, Wen Yang 1, Ying Ren 1 and Hao Zhou 1 1 Beijing Key Laboratory of Green Recycling and Extraction of

Effect of B2O3 on Melting Temperature of CaO

2010/10/1Abstract B 2 O 3 is selected as fluxing agent of CaO-based ladle refining slag to decrease the melting temperature as well as to improve the speed of slag forming and the refining efficiency. The effects of B 2 O 3 on the melting temperature of two series of refining slags including the low basicity slags (the mass ratio of CaO/SiO 2 is 3 — 4) and the high basicity slags (the mass ratio of

A Study on the Thermal State of Steelmaking Ladles

thermal conductivity values for ladle slag were used to study the effect of the slag layer on the top surface of the melt on heat transfer and fluid flow in a teeming ladle. In the first stage, the transient hot-wire method was verified to measure the thermal

Chemical, Mineralogical, and Morphological Properties of

2011/10/26Steel slag is a byproduct of the steelmaking and steel refining processes. This paper provides an overview of the different types of steel slag that are generated from basic-oxygen-furnace (BOF) steelmaking, electric-arc-furnace (EAF) steelmaking, and ladle-furnace steel refining processes. The mineralogical and morphological properties of BOF and electric-arc-furnace-ladle [EAF(L)] slag

USE OF ALUMINIUM DROSS FOR SLAG TREATMENT IN SECONDARY STEELMAKING TO DECREASE AMOUNT OF REDUCIBLE OXIDES IN LADLE

2.17. Effect of FeO + MnO Content in Ladle Slag on Lowering Dissoloved Al (from ladle to mold) and from (ladle to tundish) and on Increasing Alumina Content (measured in tundish)..34 2.18. Correlation of FeO Content in

A Kinetic Model to Predict the Compositions of Metal, Slag

Here, the effect of slag basicity on the composition change in the inclusions is investigated. Table 2 shows the basicity values and the corresponding compositions of the slag. In this calculation, slag is assumed as a uniform liquid phase and the difference in

On the role of slag in the oxygen converter process

Evolution of iron bath and slag composition in a blow in 55 ton LD converter at Koverhar steelworks13. The temperature of the steel with 0.22% C in the end of the blow was reported to be close to 1700 C. Charge: 48 ton of hot metal, 5 ton

Characteristics of Ladle Refining Furnace process (2)

The refining of white slag can reduce O, S and inclusive content. Deoxidant is not necessary to be charged during LF refining, and deoxidization can be realized by absorption of oxide to white slag. To be as a complicated melting system, temperature inside Ladle Refining Furnace is subject to effect

CZ94091A3

This invention relates to the refining of steel external to a primary steelmaking vessel, for example in the ladle. More particularly, it is: A.) a method of synthesizing a slag on the steel that (i) mitigates the detrimental effects of existing natural slag carried over from

Initial Slag in Primary Desulphurisation of Hot Metal

composition of initial slag in primary desulphurisation exhibit large variances. The main goal of this thesis was to study the composition and amount of initial slag, and to identify the effect of initial slag on the efficiency of the primaryprocess.

Effect of calcium content on inclusions during the ladle furnace refining

Effect of calcium content on inclusions during the ladle furnace refining process of AISI 321 stainless steel Chao Pan1), Xiao-jun Hu1), Jian-chao Zheng2), Ping Lin3), and Kuo-chih Chou1) 1) State Key Laboratory of Advanced Metallurgy, University of Science and

Hydrogen and Nitrogen Control in Ladle and Casting

2005/1/15A transient mathematical model is developed for simulating the bubble-steel-slag-top gas four-phase flow in a bottom-blown argon-stirred ladle with a 70-ton capacity. The Lagrangian discrete phase model (DPM) is used for describing the moving behavior of bubbles in the steel and slag.

Desulphurization in a Ladle Furnace

In the example, we first investigate how the composition of the slag phase influences the sulfur content in the steel using a grid calculation. We then explore the common problem during steelmaking of what to do when some of the furnace slag, which is oxidized and rich in FeO, is tapped into the ladle, reducing the desulphurizing ability of the slag in the LF.

AN ADVANCE MATHEMATICAL MODEL OF THE SLAG PHASE IN A GAS

SLAG PHASE IN A GAS-STIRRED LADLE Mansour Al-Harbi SABIC Technology Center-Jubail, Saudi Arabia H. Atkinson S. Gao University of Leicester, United Kingdom ABSTRACT The slag thermo-physical properties play a major role in the refining process

Effect of Slag Impregnation on Thermal Degradations in

Effect of Slag Impregnation on Thermal Degradations in Refractories Eric Blond, Nicolas Schmitt, and Franois Hild LMT-Cachan (ENS de Cachan/CNRS-UMR 8535/Universite Paris 6), F-94235 Cachan Cedex, France Philippe Blumenfeld Arcelor Research, Voie

WO1991015604A1

This invention relates to the refining of steel external to a primary steelmaking vessel, for example in the ladle. More particularly, it is: A) a method of synthesizing a slag on the steel that (i) mitigates the detrimental effects of existing natural slag carried over from the

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