clean steel production by ladle refining pdf

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Steelmaking - Wikipedia
Steelmaking - Wikipedia

Primary steelmaking involves converting liquid iron from a blast furnace and steel scrap into steel via basic oxygen steelmaking, or melting scrap steel or direct reduced iron (DRI) in an electric arc furnace Secondary steelmaking involves refining of the crude steel before casting and the various operations are normally carried out in ladl...

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(PDF) Inclusion Evolution and Removal in Ladle Refining ,
(PDF) Inclusion Evolution and Removal in Ladle Refining ,

However, the ladle treatment process also serves several other functions that, at times, can be in conflict with clean steel production The most common ladle treatment steps include deoxidation of the steel and the slag, desulfurization of the steel, alloying the steel, adjusting the steel temperature for shipment to the caster, control of ....

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Inclusion Removal During Ladle Refining - ResearchGate
Inclusion Removal During Ladle Refining - ResearchGate

Inclusion Evolution and Removal in Ladle Refining R J O’Malley Iverson Chair Professor and , functions that, at times, can be in conflict with clean steel production The most common ladle...

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LADLE REFINING AND SLAG CONDITIONING - Semantic Scholar
LADLE REFINING AND SLAG CONDITIONING - Semantic Scholar

The goal of ladle refining is to deliver a ladle of homogeneous liquid steel to the caster (or ingot station) on time, at the right temperature, and meeting total chemical specifications , The drive in recent years by the iron and steelmaking industry to cut costs and still produce high , (clean the steel) 3 Dephosphorize in the furnace ....

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CN101956044A - Refining method for improving clean class ,
CN101956044A - Refining method for improving clean class ,

The invention relates to a refining method for improving the clean class of steel The method comprises the following steps of: adding molten steel obtained by smelting into a steel ladle, and performing ladle furnace refining and casting sequentially, wherein refining slag is added into the steel ladle in the process of adding the molten steel obtained by the smelting into the steel ladle ....

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AVAILABLE AND EMERGING TECHNOLOGIES FOR ,
AVAILABLE AND EMERGING TECHNOLOGIES FOR ,

Available and Emerging Technologies for Reducing Greenhouse Gas Emissions from the Iron and Steel Industry Prepared by the Sector Policies and Programs Division Office of Air Quality Planning and Standards US Environmental Protection Agency Research Triangle Park, North Carolina 27711 September 2012...

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(PDF) Inclusion Evolution and Removal in Ladle Refining
(PDF) Inclusion Evolution and Removal in Ladle Refining

PDF | The production of steels with low total oxygen content and preferred oxide morphologies requires effective inclusion removal during ladle treatment after deoxidation and control of the ....

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The State–of-the-Art Clean Technologies (SOACT) for ,
The State–of-the-Art Clean Technologies (SOACT) for ,

The State–of-the-Art Clean Technologies (SOACT) for Steelmaking Handbook reduce environmental impacts in the steel industry Its purpose is to share information about commercialized or emerging technologies and practices that are currently available to increase energy efficiency and ,...

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Basic oxygen furnace based steelmaking processes and ,
Basic oxygen furnace based steelmaking processes and ,

Basic oxygen furnace based steelmaking processes and cleanliness control at Baosteel L Zhang*1, J Zhi2, F Mei2, , ladle furnace (LF) refining is used to modify inclusions and improve submerged entry nozzle (SEN) clogging , industrial clean steel production using the BOF based steelmaking process and steel cleanliness control at...

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REFINING OF STEEL BY USING SYNTHETIC SLAG - UPT
REFINING OF STEEL BY USING SYNTHETIC SLAG - UPT

REFINING OF STEEL BY USING SYNTHETIC SLAG 1 , Treating the liquid steel with synthetic slag in the casting ladle is an efficient and relatively cheap method of reducing the non-metal inclusion content by reducing the sulphur and oxygen content , C Bertrand, Secondary steelmaking synthetic slags for ultra clean steel production, in ....

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Inclusion Investigation during Clean Steel Production at ,
Inclusion Investigation during Clean Steel Production at ,

Inclusion Investigation during Clean Steel Production at Baosteel Lifeng Zhang, Brian G Thomas , The definition of ‘clean steel’ varies with steel grade and its end use For , (ladle before steel refining, ladle after steel refining, tundish or mold), TO j...

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Secondary Refining - steelorg
Secondary Refining - steelorg

A Ladle Furnace is used to relieve the primary melter of most secondary refining operations, and its primary functions are: § Reheating of liquid steel through electric power conducted by graphite electrodes § Homogenization of steel temperature and chemistry through inert gas stirring...

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Key words: Primary steelmaking, ladle metallurgy, ingot ,
Key words: Primary steelmaking, ladle metallurgy, ingot ,

cleanliness by performing the following treatments in “Ladle”: a) To stir the molten steel by purging inert gas through the bottom of the ladle b) To inject slag forming powder either through a lance for further refining c) To produce clean steel either by removing inclusions or ,...

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

the combination of EMS and gas stirring (EMGAS) in the ladle refining process is an excellent solution for clean steel production EMGAS has strong operational flexibility in terms of control of the melt flow velocity, gas plume shape and residence time, stirring energy, and slag/steel mixing...

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Plasma Ladle Furnace
Plasma Ladle Furnace

of the plasma ladle furnace (PLF) Due to its inert atmosphere the PLF has advan- tages for clean steel production extending the application range of normal ladle fur- naces to higher quality grad Moreover, integration of a PLF into an existing steel- works provides the possibility of optimis- ing the whole production line Balancer Compensation...

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Modeling of Inclusion Removal in Ladle Refining
Modeling of Inclusion Removal in Ladle Refining

Key words: Steelmaking, Ladle refining, Clean steel, Gas injection, Multiphase flow, Inclusion, Bubble, Attachment probability INTRODUCTION Gas injection is widely used in secondary refining processes to homogenize chemical composition and temperature and to remove inclusions...

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INCLUSION CONTROL MODEL IN THE LADLE METALLURGY ,
INCLUSION CONTROL MODEL IN THE LADLE METALLURGY ,

22 Clean Steel Concept 14 23 Inclusion Morphology 17 24 Modification of Inclusions with Calcium 19 25 Analysis of Inclusions 20 26 Inclusion Removal in Ladle Metallurgy 22 27 Slag Control 23 271 Refining of Impurities in Steel 23 272 Avoiding Steel Reoxidation 25 273 Inclusion Removal to Slag 27 28 Stirring 30...

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Ladle Refining Furnaces (LRF) - Inductotherm Corp
Ladle Refining Furnaces (LRF) - Inductotherm Corp

Ladle refining of liquid metal is a proven technology to produce high quality steel A Ladle Refining Furnace is used to raise the temperature and adjust the chemical composition of molten metal Without LRFs, higher tap temperatures are normally required from steel making furnaces due to heat losses during refining with conventional ladl...

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Iron and Steel Making Machines - Induction Melting Furnace ,
Iron and Steel Making Machines - Induction Melting Furnace ,

Owing to our vast industry experience and expertise, we have been able to offer Ladle Refining Furnac This system is specially designed to remove slag with phosphorus to make the steel clean To control electrode consumption as low as 03 -04 kg/ ton, servo valves and hydraulic cylinders are used for electrode regulation Features:...

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Production of Super Clean Steels—Deoxidation Mechanism ,
Production of Super Clean Steels—Deoxidation Mechanism ,

The main problem in producing such a steel on an industrial scale is gaining a sufficiently low oxygen content as a precondition for successful desulfurization and high cleanliness This situation is only possible by applying ladle refining techniqu Two model rotors of this “super clean steel” were produced and tested...

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(PDF) 13 - Kunz - LADLE REFRACTORIES FOR CLEAN STEEL ,
(PDF) 13 - Kunz - LADLE REFRACTORIES FOR CLEAN STEEL ,

Key aggregate for inclusion control is the ladle, fine adjustments are possible in the tundish This article offers refractory solutions for clean steel production in the ladle CLEAN STEEL FACTORS: There are countless influences to clean steel production during steel Melting, Tapping and Ladle Refining/Degassing (table 1)...

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Tundish Technology for Clean Steel Production
Tundish Technology for Clean Steel Production

Continuous casting of steel has become a widely used process and an important step in steel production The worldwide share of continuously cast steel has increased significantly in the last 25 years or so However, concurrent with this increase in production levels are stringent quality ....

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Tundish Technology for Clean Steel Production (328 Pages)
Tundish Technology for Clean Steel Production (328 Pages)

modern EAF produces steel by remelting and refining steel scrap and other raw materials, and also uses oxygen gas injection and lime addition Fig 11 [1] schematically shows a modern steelmaking and , 2 Tundish Technology for Clean Steel Production but a comprehensive description of tundish technology from both a , any discussion of ladle ....

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125 Iron And Steel Production - US EPA
125 Iron And Steel Production - US EPA

125 Iron And Steel Production , During casting, molten iron flows into runners that lead to transport ladl Slag also flows into the clay-filled iron notch at the base of the hearth During casting, molten iron flows into runners , melting and refining The steel product is tapped by opening a hole in the base of the furnace with an...

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A Study on Molten Steel/Slag/Refractory Reactions during ,
A Study on Molten Steel/Slag/Refractory Reactions during ,

During the production of steel the degree of oxide inclusions partly depends on the reaction of the melt with the furnace lining, the ladle lining and the pouring system The refractory material may be eroded by the molten steel and slag as well as corroded through chemical reactions with the slag and molten steel and the deoxidation products...

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US5397379A - Process and additive for the ladle refining ,
US5397379A - Process and additive for the ladle refining ,

FIELD OF INVENTION The present invention relates to the ladle refining of steel with a surface slag covering More specifically, the present invention relates to the utilization of solid, preferably briquetted, recycled ladle metallurgy furnace (LMF) slag as a flux in slag-making additions including desulfurizers, slag conditioners and synthetic slags...

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An Overview of Steel Cleanliness From an Industry Perspective
An Overview of Steel Cleanliness From an Industry Perspective

years as it relates to clean steel The belief then and still today is that clean steel practices start in the ladle A heat with high cleanliness could potentially stay clean during casting and result in a clean steel product However, a marginal heat from the ladle refining station has very little chance of resulting in a clean steel product...

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Vacuum Degassing of Steel - Vacaero
Vacuum Degassing of Steel - Vacaero

Dec 05, 2017· Vacuum degassing plays a critical role in the manufacture of steel The vacuum degassing process allows the production of high quality, low carbon, and ultra-low carbon steels and stainless steels, with minimal oxygen, hydrogen, and nitrogen contamination The main benefits include: Reducing hydrogen content to avoid embrittlement of steel...

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Tundish Technology for Clean Steel Production (328 Pages)
Tundish Technology for Clean Steel Production (328 Pages)

Steel production of world has increased significantly in the last decade, and has reached over 123 billion tons in 2006 from 850 million tons in 1996 Continuous casting of steel is a widely used process and is an important step in steel production About 90% of the raw steel produced worldwide is continuously cast now In some parts of the world...

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PROGRESS OF PRODUCTION TECHNOLOGY OF CLEAN ,
PROGRESS OF PRODUCTION TECHNOLOGY OF CLEAN ,

- 1 - PROGRESS OF PRODUCTION TECHNOLOGY OF CLEAN STEEL IN BAOSTEEL CUI Jian ZHENG Yiyu ZHU Lixin (Baoshan Iron and Steel Co, LTD) ABSTRACT: The progress in control technology of carbon, nitrogen, total oxygen, phosphorus, and sulphur as well as inclusions in steel is made at Baosteel...

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