Melting Remelting and Casting for Clean SteelCampbell
May 12 2016 · The slag which forms to a depth of 100 mm or more on the top of the melt in the ladle is comprised of the bifilms which have separated by flotation. If the bifilms are assumed to be in the region of 10–100 nm thick the 100 mm slag layer must contain a depth of
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Modeling of the BOF Tapping Process The Reactions in the
A tapping process model of the steel from the basic oxygen furnace (BOF) addressing the reactions in the ladle is proposed. In the model the effective equilibrium reaction zone (EERZ) method is applied to describe the steel/slag interfacial reaction. The equilibrium reactions in the bulk steel (steel/inclusion/lining wear) and slag (liquid slag/slag additions/lining wear) are considered.
Get Price(PDF) A REVIEW ON CAUSES OF INNTERNAL DEFECTS IN
A REVIEW ON CAUSES OF INNTERNAL DEFECTS IN CONTINUOUS CASTING Muhammad A.B.Elsaiedy1 Mohamed A .AbouOmar2 1 Quality Control Eng. It is one of progressive steel making technologies which produces a cast product of the desired cross section in indefinite length. and speed the mould oscillation and cooling the quality and properties of
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A Study of Slag-Steel-Inclusion Interaction During Ladle
slag sample was taken just after teeming from the EAF but the corresponding steel sample could not be collected until the ladle had entered the ladle station. After addition and melting of synthetic slag formers the second sample was taken. Finally after Al-deoxidation alloying and vacuum treatment the last sample was taken. Figure 2.
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Experimental and Numerical Study of the Free Surface
The authors also claimed that entrapments are initiated in a steel ladle when the Weber number is equal to 12.3. Jönsson et al. 35 also studied the Weber number at the steel/slag interface in a gas‐stirred ladle by using this critical Weber number.
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(PDF) Cementitious binders from activated stainless steel
The ˇ → transformation The final phase of the metallurgical operation is carried out in a is accompanied by a volume increase of approximately 12 which continuous casting ladle where slag is used as a covering layer leads to high internal stresses in the solid slag and finally causes for the molten metal to prevent its oxidation and
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Study of the Suitability of Different Types of Slag and
This paper is part of a research line focused on the reduction of the use of cement in the industry. In this work the study of work methodologies for the manufacture of green cementitious grout mixtures is studied. Grout is widely used in construction and it requires an important use of raw materials. On the other hand the steel industry faces the problem of the growing generation of slag
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Carbonation of Steel Slag for CO2 Sequestration Leaching
Carbonation of industrial alkaline residues can be used as a CO2 sequestration technology to reduce carbon dioxide emissions. In this study steel slag samples were carbonated to a varying extent. Leaching experiments and geochemical modeling were used to identify solubility-controlling processes of major and trace elements both with regard to carbonation mechanisms and the environmental
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Byproduct-based ettringite binderA synergy between
Feb 10 2019 · 1. Introduction. Ladle slag (LS) is an industrial byproduct from steel manufacturing processes which currently is mostly disposed to landfills or used in low-value applications .According to a statistical report from the World Steel Association 2.1–2.6 million tons of LS is produced in Europe annually if every ton of crude steel results in 12–15 kg of unrecycled LS.
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Minerals Free Full-Text The Influence of Slag Tapping
Studies conducted over the past 10 years have demonstrated the technical suitability of the electric arc furnace slag as an alternative to natural stone in several applications. Steel slag can be profitably used as a road surface layer for foundations and embankments or for concrete aggregates. However a strong limitation to their use is due to the presence of toxic metals (Ba Cr V Mo
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Tundish Technology for Casting Clean Steel A ReviewPDF
Slag detection devices can be used at the ladle-to-tundish outlet that can detect the onset of slag transfer from the ladle to the tundish. An electromagnetic method in which the slag sensor electromagnetically detects slag in the pouring streams is very
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(PDF) Advances in Ladle Shroud as A Functional Device in
Advances in the functions of ladle shroud in tundish metallurgy have been reviewed in this work including shrouding the teeming stream fluid flow control slag carry-over detection and the
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Processes Free Full-Text Numerical Modeling of Equal
Mixing time is a parameter that measures the mixing efficiency of the primary phase (liquid steel) in a bath. Mathematically it is defined as the time at which there is a chemical homogeneity of 95 in the steel .Mixing time helps to quantify the degree of agitation needed to homogenize the liquid contents after a step change in the composition inside a ladle.
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(PDF) RISK ASSESSMENT FOR BLAST FURNACE USING FMEA
Occurrence values should have data to provide justification. An example rating for occurrence is given in the table 2. Detection (D)Detection is an assessment of the likelihood that the current controls will detect the cause of failure mode. An example for detection rating is as shown in the table 3.
Get PriceTreatment and characterisation of electric Global Slag
Ladle refining slag from the steel refining processes in the ladles. The blast furnace slag after granulation and grinding finds extensive use in cement and concrete. The steel slag however is yet to find a value added application except for its occasional usage as a cementitious binder. More often than not it is used as a landfill material.
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Lecture 14 M odern trends in BOF steelmaking Contents
Slag can be carried-over from converter to ladle in the initial stage when converter is tilted. As tapping proceeds converter is tilted further which leads to formation of vortex and top slag is carried into the ladle. During up -tilting part of the slag may be carried into ladle.
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An Overview of Steel Cleanliness From an Industry
The processing of heats at the ladle station or degasser has been one of the key focus areas for research and study for many in the ladle have been investigated in a number of studies 1. 1-3Tapping practices and tap oxygen levels. 2. 5. 35Ladle bottom designs and slag detection systems.
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(PDF) A REVIEW ON CAUSES OF INNTERNAL DEFECTS IN
A REVIEW ON CAUSES OF INNTERNAL DEFECTS IN CONTINUOUS CASTING Muhammad A.B.Elsaiedy1 Mohamed A .AbouOmar2 1 Quality Control Eng. It is one of progressive steel making technologies which produces a cast product of the desired cross section in indefinite length. and speed the mould oscillation and cooling the quality and properties of
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BOF Converter Slag ValorizationTechnische
A New Vibration Ladle Slag Detection System. Yang J. / Tian L. / Fei A. / Association for Iron Steel Simulation of the Centerline Segregation Generated in a Tapered Face Mold by the Formation of Bridging. Murao T. / Kajitani T Real-Time Water Detection Technology at ArcelorMittal Coatesville. Zuliani D. / Alshawarghi H
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Recycling of ladle slag in cement composites
Sep 01 2015 · The aqueous leachates from the ladle slag and the Portland cement are highly alkaline (with a pH of around 13) due to the presence of high concentrations of water soluble Ca(OH) 2 and CaCO 3.Because most of the elements are poorly soluble at a highly alkaline pH (formation of hydroxides) their concentrations are very low.
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Ladle Secondary Refining Technology Committee Activities
Ladle Secondary Refining Technology Committee Activities. The LSRTC held a virtual meeting 8 October 2020. The LSRTC discussed the steel industry fatalities and reviewed the current statistics. They also reviewed the papers for AISTech 2021 and solicited volunteers for session chairs.
Get PriceMinerals Free Full-Text The Influence of Slag Tapping
Studies conducted over the past 10 years have demonstrated the technical suitability of the electric arc furnace slag as an alternative to natural stone in several applications. Steel slag can be profitably used as a road surface layer for foundations and embankments or for concrete aggregates. However a strong limitation to their use is due to the presence of toxic metals (Ba Cr V Mo
Get Price
(PDF) A REVIEW ON CAUSES OF INNTERNAL DEFECTS IN
A REVIEW ON CAUSES OF INNTERNAL DEFECTS IN CONTINUOUS CASTING Muhammad A.B.Elsaiedy1 Mohamed A .AbouOmar2 1 Quality Control Eng. It is one of progressive steel making technologies which produces a cast product of the desired cross section in indefinite length. and speed the mould oscillation and cooling the quality and properties of
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Borate Distribution in Stabilized Stainless-Steel Slag
Q18 Journal 1 Borate Distribution in Stabilized Stainless-Steel Slag 2 3 4 Dirk Durinck w z Sander Arnout z Gilles Mertens y Eddy Boydens z Peter Tom Jones z Jan Elsen y Bart 5 Blanpain z Patrick Wollantsz 6 z 7 Department of Metallurgy and Material Science Catholic University of Leuven Leuven Belgium Q1 8 y 9 Department of Geology K.U
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(PDF) REVIEW OF STRAND CASTING FACTORS AFFECTING STEEL
"A Steel Quality LeapfrogDetection and Elimination of Ladle-to-Tundish Slag Carryover " ISS 9th Process Technology Conference Proceedings March 1990 Detroit MI. 9. D. J. Trotter G. Duncan and J. M. Camplin "Development of a Ladle/Tundish Slag Detector " ISS 74th Steelmaking Conference Proceedings April 1991 Washington D.C. 10. K.
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International Advanced Researches Engineering Congress
Ladle Slag Detection Technologies in Continuous Casting Process . 409 TN method for the diffusion length of onespeed neutrons in a slab with forward and backward scattering . 882 Study of Steel Mill Slag from Integrated Iron and Steel Plant Effect on the Carrying Power of the Clayey Soils .
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Experimental study on accelerometer-based ladle slag
Jan 02 2020 · It is known that a carryover ladle slag consists of mainly oxides such as CaO SiO 2 Al 2 O 3 and MgO. Carryover slag has to be kept under control otherwise one can end up with negative results. With the development of sensor technology the detection of carryover ladle slag becomes possible at the end of heats.
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Modeling of the BOF Tapping Process The Reactions in the
A tapping process model of the steel from the basic oxygen furnace (BOF) addressing the reactions in the ladle is proposed. In the model the effective equilibrium reaction zone (EERZ) method is applied to describe the steel/slag interfacial reaction. The equilibrium reactions in the bulk steel (steel/inclusion/lining wear) and slag (liquid slag/slag additions/lining wear) are considered.
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The Hampering Effect of Precipitated Carbon on Hot Metal
In this process metallic magnesium and lime are injected via a lance into a ladle filled with hot metal from the BF. The reagents react directly or indirectly with sulfur to form sulfides which float to the slag layer. After reagent injection the sulfide containing slag is skimmed off
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