effect of direct reduced iron dri on dephosphorization
Phosphorus Equilibrium Between Liquid Iron and CaO-SiO 2
Abstract. The increased use of electric arc furnace (EAF) steelmaking using up to 100 direct reduced iron (DRI) has prompted an interest in better control of phosphorus since iron ore and consequently DRI have higher phosphorus and silica compared to scrap.
Get PricePhosphorus Equilibrium Between Liquid Iron and CaO-SiO 2
Abstract. The increased use of electric arc furnace (EAF) steelmaking using up to 100 direct reduced iron (DRI) has prompted an interest in better control of phosphorus since iron ore and consequently DRI have higher phosphorus and silica compared to scrap.
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2.1 Direct Reduced Iron Direct reduced iron (DRI) is a raw material used in steel production. DRI is primarily used in EAF when there is a demand for low amounts of metallic impurities such as copper and tin. It is also used when there is a shortage of suitable scrap. Direct reduction (DR) is a solid state type of reduction of iron ore
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Mar 30 2021 · DRI use in the Basic Oxygen Furnace (BOF) HBI is the form of DRI best suited for use in the BOF because of its bulk density and physical strength. It is an alternative to coolant scrap because Residuals levels are lower. Bulk density is higher. Mass and heat balances are more accurate. Steel chemistry is easier to control.
Get PriceModel studies on the effects of composition differences of
2.1 Direct Reduced Iron Direct reduced iron (DRI) is a raw material used in steel production. DRI is primarily used in EAF when there is a demand for low amounts of metallic impurities such as copper and tin. It is also used when there is a shortage of suitable scrap. Direct reduction (DR) is a solid state type of reduction of iron ore
Get PriceEffect of Direct Reduced Iron Proportion in Metallic
The present work deals with the effects of percentage of direct reduced iron in EAF charge mix on important steelmaking operation parameters for 4994 heats. The mechanical properties for some of them also investigated. 2. Experimental Work Table 5 2.1Practice of steelmaking with direct reduced iron and scrap EAF slag After
Get PricePhosphorus Control in DRI-EAF Steelmaking Thermodynamics
Flexibility in raw materials the lower natural gas prices and the increased use of nonconventional Electric Arc Furnace (EAF) steelmaking using up to 100 Direct Reduced Iron (DRI) have prompted a renewed interest in better control of phosphorus. Iron ore and DRI have higher phosphorus and silica compared to scrap.
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dephosphorization of high phosphorus iron ore using coal-based direct reduction. Sun et al.1) used the process of direct reduction-magnetic separation to treat high phosphorus iron ore to achieve direct reduction iron (DRI). During the reduc-tion process phosphorus was reduced from fluorapatite and partially migrated into the metallic iron phase.
Get PriceThe Preparation of High-Purity Iron (99.987 ) Employing a
Ideally almost all iron oxide can be reduced to metallic iron. Of course the direct reduced iron (DRI) pellets with various reduction extent can be obtained by controlling the reduction time to create conditions for the melting separation and dephosphorization step. Figure 1.
Get PriceNitrogen in SL/RN direct reduced iron origin and effect
Keywords SL/RN Rotary kiln Direct reduced iron Nitrogen control Electric steelmaking Additional information The authors thank the AMSA staff for samples data and information as well as the Department of Materials Science and Metallurgical Engineering of the University of
Get PriceEffect of Reduction Degree on Characteristics of Slag
After melting the direct reduced iron (DRI) exchange reactions will take place between the initially formed slag and the molten iron. The unreduced oxides viz. the remaining iron oxide the main part of all other oxides inherent to the ore and the additives and binders added during pellet making 4 will participate in slag formation.
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Direct Reduced Iron (DRI) Production Plant NIPPON STEEL ENGINEERING CO. LTD. Basic Concept or Summary S-16 u A direct reduced iron (DRI) production plant is a shaft reduction furnace to produce DRI with large metal iron content by directly reducing iron ore (or iron
Get PriceSTUDY ON BASICITY IN DIRECT REDUCED IRON SMELTING
Pig iron as raw material for steel production can be prepared by smelting a Direct Reduced Iron (DRI)/sponge iron. The smelting process needs optimum conditions to obtain such a high recovery likes basicity which measures the ratio of alkalinity or acidity by adding the exact quantity of flux (CaCO3) and quartz sand to input materials to
Get PriceCombined Corex/DRI technology (Journal Article) OSTI.GOV
The U.S. Department of Energy s Office of Scientific and Technical Information
Get PriceThe increasing role of direct reduced iron in global
The increasing role of direct reduced iron in global steelmaking by F. Grobler and R.C.A. Minnitt† Synopsis Direct reduced iron (DRI) produced by the reaction between iron ore and reducing gasses is used as a source of low-residual iron in addition to ferrous scrap and pig iron in the production of steel
Get PriceThe Influence of Sulfur on Dephosphorization Kinetics
Effect of Direct Reduced Iron (DRI) on Dephosphorization of Molten Steel by Electric Arc Furnace Slag The Influence of Sulfur on Dephosphorization Kinetics Between Bloated Metal Droplets and Slag Containing FeO
Get PriceNITROGEN IN SL/RN DIRECT REDUCED IRON ORIGIN AND
Direct Reduced Iron (DRI) is used as an alternative feedstock in electric arc furnaces making up 50 or more of the total iron charge. DRI produced with coal based reductants (for example in rotary kilns) make up roughly 25 of DRI produced in the world. It was found that SL/RN DRI
Get PriceEffect of Direct Reduced Iron (DRI) on Dephosphorization
Dec 01 2018 · Park Joo Hyun We investigated the effect of direct reduced iron (DRI) addition on dephosphorization of molten steel by electric arc furnace (EAF) slag at 1823 K (1550 °C). Various phenomena such as CO gas evolution and slagmaking by gangue oxides in DRI were experimentally observed at each reaction step.
Get PriceUse of Direct Reduced Iron in Electric Arc FurnaceIspatGuru
May 08 2013 · Processes which produce DRI by reduction of iron ore below the melting point of the iron are normally known as the direct reduction processes. The reducing agents are carbon monoxide (CO) and hydrogen (H2) coming from reformed natural gas syngas or coal. Iron ore is used mostly in pellet and/or lumpy form.
Get PriceMidrex Process for Direct Reduction of Iron OreIspatGuru
Apr 09 2017 · Midrex Process for Direct Reduction of Iron Ore. Midrex is an ironmaking process developed for the production of direct reduced iron (DRI). It is a gas-based shaft furnace process is a solid state reduction process which reduces iron ore pellets or lump ore into DRI without their melting using reducing gas generally formed from natural gas.
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A method and apparatus for reducing iron oxides using microwave heating in a furnace chamber which is sealed against the entrance of air reduces the energy required and produces a low temperature reduction and allows the recovery of combustible synthetic gas as a byproduct of the process. Avoidance of the reduction of sulfur phorphorus and silica is also insured as is the need to reduce the
Get PricePhosphorous Control in Induction Furnace Steel Melting
Since the available furnace lining is acidic a high basicity of 3.5 is maintained for effective P removal. However with basic lining even with lower basicity the same result may be obtained. It is used to control the phosphorous amount of the final product. Steel scrap and direct reduced iron (DRI) are used as
Get PriceModel studies on the effects of composition differences of
2.1 Direct Reduced Iron Direct reduced iron (DRI) is a raw material used in steel production. DRI is primarily used in EAF when there is a demand for low amounts of metallic impurities such as copper and tin. It is also used when there is a shortage of suitable scrap. Direct reduction (DR) is a solid state type of reduction of iron ore
Get PriceDirect Reduced Iron (DRI) International Iron Metallics
Direct Reduced Iron (DRI) is the product of the direct reduction of iron ore in the solid state by carbon monoxide and hydrogen derived from natural gas or coal. See more information about the production of DRI . Most gas-based direct reduction plants are part of integrated steel mini-mills located adjacent to the electric arc furnace (EAF
Get PriceSaqlain Muhammad Owais Muhammad Järvinen Mika
The other important steel making process is the direct iron reduction- electric arc furnace pathway. Here the iron ore is reduced in the presence of a reducing gas or elementary carbon produced from natural gas or coal. Unlike BF the reduction process occurs below the melting point of iron in the temperature range of 800 ⁰C -1200 ⁰C.
Get PriceThe Reaction Behavior of Direct Reduced Iron (DRI) in
impact on its behavior in slags. However the effect of carbon on DRI–slag reaction has not been studied previously. Moreover recent introduction of Hot Charging technology (2 15 16) that allows direct discharge of DRI at high temperature to EAF demands a study on the effect of DRI preheating temperature on its reactions with slag.
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Mar 30 2021 · DRI use in the Basic Oxygen Furnace (BOF) HBI is the form of DRI best suited for use in the BOF because of its bulk density and physical strength. It is an alternative to coolant scrap because Residuals levels are lower. Bulk density is higher. Mass and heat balances are more accurate. Steel chemistry is easier to control.
Get PriceThe Preparation of High-Purity Iron (99.987 ) Employing a
In this study high-purity iron with purity of 99.987 wt. was prepared employing a process of direct reduction–melting separation–slag refining. The iron ore after pelletizing and roasting was reduced by hydrogen to obtain direct reduced iron (DRI). Carbon and sulfur were removed in this step and other impurities such as silicon manganese titanium and aluminum were excluded from
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DIRECT REDUCED IRONTHE VERSATILE METALLIC DRI Products Applications 2 DIRECT REDUCED IRON THE VERSATILE METALLIC DRI is a premium ore-based metallic (OBM) raw material made by removing chemically-bound oxygen from iron oxide pellets and lump ores without melting. DRI is high in iron content and low in copper and other undesirable metals
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