Desulphurization of Hot MetalIspatGuru
Oct 16 2013 · Magnesium is the only one of the three common desulphurization reagents that is soluble in hot metal and reacts with sulphur in solution. The desulphurizing reaction with magnesium takes place as per equation Mg S = MgS. Due to low boiling point (1090 deg C) magnesium vapourizes as it enters the hot metal.
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USA1Ironmaking and SteelmakingGoogle
A steelmaking process is disclosed. The process includes producing molten steel and molten steelmaking slag in a steelmaking process the steelmaking slag including iron units and flux units and thereafter producing molten iron in a molten bath based direct smelting process using a substantial portion of the steelmaking slag as part of the feed material requirements for the direct smelting
Chat OnlinePre-Treatment of Hot Metalsteelfoundation
Pre-treatment of hot metal is the adjustment of the composition and temperature of blast furnace produced hot metal for optimal operation of the oxygen converter process as such it is one of the interdependent chain of processes that constitute modern steelmaking 1 Fig. 7.1.
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Pre-Treatment of Hot Metal.pdf Steelmaking Magnesium
Pre-treatment of hot metal is the adjustment of the composition and temperature of blast furnace produced hot metal for optimal operation of the oxygen converter process as such it is one of the interdependent chain of processes that constitute modern steelmaking 1 Fig. 7.1.When taken to the extreme case the converter process function is reduced to scrap melting and carbon reduction sub
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Welcome to Eprints NMLeprints NML
sulphur percentages in the hot metal as low as 0.00370 are often obtained by additional ection or stirring treatments. Preferentially for batch— type supply of low-sulphur hot metal to the steelmaking shop use is mostly made of methods employing hollow or solid-body stirrers or a plunging bell using Mg—impregnated coke or similar materials .
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Steel and Iron Handbookniir
Pretreatment of Hot Metal Acid Burdening of Blast Furnace and External Desulphurisation Basic Burdening of Blast Furnace and External Desiliconisation Modern Approach to Pre-treatment of Hot Metal 13. LAYOUT OF STEELMAKING SHOP Location Size Lay-Out 14. MODERN STEELMAKING Modern Steelmaking-History Modern Steelmaking—Bofild Steel Making
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Hot Metal Desulfurization_Steel Pipe knowledge_News_World
bell insert magnesium coke (magnesium 40 to 45 ) or magnesium steel scrap clumps (about 25 ) of magnesium magnesium and a dolomite (magnesium 60 ) mass release into the graphite bell and then insert the hot metal (see Figure 8) magnesium vapor from the bell Kong Zhongyi a circular motion in contact with the molten iron and molten iron to
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International Journal of Minerals Metallurgy and
kg dolomite per heat was charged for pre-treating 20-25 t hot metal. All the charged lime and dolomite can be rapidly melted as premelted slag to effectively deplete hot metal spitting and reduce radia-tion heat released from the oxidization of carbon and silicon in hot metal during hot metal
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IRON MAKING AND STEELMAKING THEORY AND PRACTICE
Feb 29 2008 · Modern developments in blast furnaces including modelling and process control are discussed along with an introduction to the alternative methods of ironmaking. In the area of steelmaking BOF plant practice including pre-treatment of hot metal metallurgical features of oxygen steelmaking processes and their control form part of the book.
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kg dolomite per heat was charged for pre-treating 20-25 t hot metal. All the charged lime and dolomite can be rapidly melted as premelted slag to effectively deplete hot metal spitting and reduce radia-tion heat released from the oxidization of carbon and silicon in hot metal during hot metal
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Curie Point of Magnesium-Manganese-Ferrite in Slow-Cooled
reports to the hot metal. Typically 85 of the phosphorus in hot metal is removed to slags in steelmaking thereby generat-ing steelmaking slags analyzing 1 to 3 P205. Recycling of steelmaking slags analyzing typically 15-30 Fe 40-50 CaO 5-8 MnO 5-10 MgO and 10-15 SiO2 saves iron manganese and lime. Approximately 100kg
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Progresses and Future Prospects of Steelmaking Technologies
Table 1 Developed techniques in steelmaking process Hot metal pre-treatment Reduce and Reuse of steelmaking slag Increase of Hot metal pretreatment efficiency in torpedo car and BOF (FetO) control in hot metal dephosphorizatin in BOF Blasting and slag hot recycling in hot metal desulfurization BOF Increase productivity Tuyer layout in bottom
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RECOMMENDED GUIDELINES FOR IRON STEEL SECTOR
ladle or torpedo with continuous deslagging. After the pre-treatment process co-injection / mono-injection or stirring process is adopted for desulphurisation slag skimming is done in Hot Metal ladles to ensure slag free metal for Primary steelmaking. In some of the old steel melt shops hot metal transferred in open top ladles are
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Hot Metal Desulfurization_Steel Pipe knowledge_News_World
bell insert magnesium coke (magnesium 40 to 45 ) or magnesium steel scrap clumps (about 25 ) of magnesium magnesium and a dolomite (magnesium 60 ) mass release into the graphite bell and then insert the hot metal (see Figure 8) magnesium vapor from the bell Kong Zhongyi a circular motion in contact with the molten iron and molten iron to
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The Effect of Magnesium Gas Injecting Conditions on the
vironmental friendly processes. In steelmaking processes reduction of slag and dust as well as recycle and treatment of these by-products are important subjects. Magnesium desulfurization of hot metal itself is a well known technol-ogy 5) but Yang et al.1–4) have shown a possibility of highly efficient magnesium desulfurization of hot metal
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De-Phosphorization Strategies and Modelling in Oxygen
range of the hot metal (< 1.450°C) where hot metal pre-treatment is operated. The De-P starts immediately when the Silicon is oxidized from the metal. In the later stage of the BOF-Process a low tapping temperature is favorable for Phosphorus control 4 5 Figure 2.
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PHYSICAL CHEMISTRY OF
7.2.6 Kinetics of Slag–Metal Reactions 256 7.3 Pre-treatment of Hot Metal 261 7.3.1 External Desiliconization 262 7.3.2 External Desulfurization 262 7.3.3 External Dephosphorization 262 7.3.4 Simultaneous Removal of Sulfur and Phosphorus 263 CONTENTS vii
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Study of Oxidation Steelmaking Reactions of Blast Furnace
Study of Oxidation Steelmaking Reactions of Blast Furnace Hot-metal By Efosa Curtis Obasohan (B.Eng. ProfGradIMMM) A thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy The University of Sheffield Faculty of Engineering Department of Materials Science and Engineering September 2015
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STUDY ON THE BEHAVIOR OF MAGNESIUM IN MOLTEN
with magnesium metal is one of the most widely used desulfurization methods for hot metal pretreatment 1 . However due to special properties of the magnesium metal as active alkali metal it brings additional economic burden to the storage transport and use process of the magnesium metal. In recent years the development of
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RECOMMENDED GUIDELINES FOR IRON STEEL SECTOR
ladle or torpedo with continuous deslagging. After the pre-treatment process co-injection / mono-injection or stirring process is adopted for desulphurisation slag skimming is done in Hot Metal ladles to ensure slag free metal for Primary steelmaking. In some of the old steel melt shops hot metal transferred in open top ladles are
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Pretreatment of hot metalSlideShare
Sep 17 2015 · • In most of the steelmaking practices hot metal is pre- treated to remove Si P and S from hot metal to the extent it is possible. 3. • To produce good quality steel it is necessary to lower the levels of sulphur and phosphorus to less than 0.01 . • Hence hot metal containing low levels of sulphur and phosphorus must be charged into
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Desulphurization of Hot MetalIspatGuru
Oct 16 2013 · Magnesium is the only one of the three common desulphurization reagents that is soluble in hot metal and reacts with sulphur in solution. The desulphurizing reaction with magnesium takes place as per equation Mg S = MgS. Due to low boiling point (1090 deg C) magnesium vapourizes as it enters the hot metal.
Chat OnlineProgresses and Future Prospects of Steelmaking Technologies
Table 1 Developed techniques in steelmaking process Hot metal pre-treatment Reduce and Reuse of steelmaking slag Increase of Hot metal pretreatment efficiency in torpedo car and BOF (FetO) control in hot metal dephosphorizatin in BOF Blasting and slag hot recycling in hot metal desulfurization BOF Increase productivity Tuyer layout in bottom
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International Journal of Minerals Metallurgy and
kg dolomite per heat was charged for pre-treating 20-25 t hot metal. All the charged lime and dolomite can be rapidly melted as premelted slag to effectively deplete hot metal spitting and reduce radia-tion heat released from the oxidization of carbon and silicon in hot metal during hot metal
Chat OnlineTREATMENT OF HOT METAL AND LIQUID STEEL WITH
for hot metal pre-treatment and liquid steel refining which produce high efficiency low cost and environmentally friendly processes. In the aluminum industry about 2-4 tonnes of waste slag including by-products (red mud and white mud) from alumina production and dross from aluminum electrolysis and
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STUDY ON THE BEHAVIOR OF MAGNESIUM IN MOLTEN
with magnesium metal is one of the most widely used desulfurization methods for hot metal pretreatment 1 . However due to special properties of the magnesium metal as active alkali metal it brings additional economic burden to the storage transport and use process of the magnesium metal. In recent years the development of
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Steelmaking NIPPON STEEL ENGINEERING
Hot Metal Pre-treatment Facility (Kanbara Reactor KR) A Kanbara reactor is a hot metal pre-treatment facility that can remove sulfur in the hot metal to lower levels and at a cheaper cost than conventional facilities. Read more
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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.
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PDF THE LEADING HOT METAL DESULFURIZATION METHODS
Steelmakers worldwide agree that the most efficient and cost-effective solution in BOF steelmaking is to desulfurize the hot metal between the blast furnace and converter. Various methods are currently in use among which the Kanbara Reactor (KR using only lime as a reagent) Magnesium mono-injection (MMI using only magnesium also known as the Ukraina-Desmag process) and co-injection (using
Chat OnlineRECOMMENDED GUIDELINES FOR IRON STEEL SECTOR
ladle or torpedo with continuous deslagging. After the pre-treatment process co-injection / mono-injection or stirring process is adopted for desulphurisation slag skimming is done in Hot Metal ladles to ensure slag free metal for Primary steelmaking. In some of the old steel melt shops hot metal transferred in open top ladles are
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