dephosphorization of steel in ladle furnace

NPTEL Metallurgy and Material Science

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Lecture 37 Secondary Steel making Introduction and de-oxidation continued Download 38 Lecture 38 Secondary Steel making Vacuum Techniques for refining steel Download 39 Lecture 39 Homogenization and Gas stirred ladle Download 40 Lecture 40 Ladle de-sulphurization, alloying, stainless steel making Download 41 Lecture 41 ....

Sumitomo Metals Group Completes Investments ,

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Oct 22, 2010 0183 32 The new dephosphorization furnace has also applied the SRP-Z process In this process dephosphorization flux in a fine powdered form is blown onto the surface of molten pig iron, in order to lower the level of phosphorous content and expand production of high-grade steel Press released on October 20, 2010...

Dephosphorization

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Jan 05, 2012 0183 32 Desulphurization is usually carried out at tapping and during ladle metallurgy, as in those stages the steel is deoxidized and the slag has high basicity and low oxygen potential low content of oxidizing components, FeO, MnO, etc...

Desulfurization Process, Dephosphorization, and Secondary ,

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The dephosphorization processes reduction in the phosphorus content of pig iron consist of oxidizing the phosphorus and combining it with calcium and other components, which are injected into the hot metal deeply, resulting in compounds transferred to the slag and, thus, removed from the metal , Next, the steel goes to the ladle furnace ....

Study on the Dephosphorization of Semi

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Combined with converter semi-steel component of Chengde steel plant, the main components of 100t ladle dephosphorization slag were calculated to propose the initial ratio of dephosphorization slag composition The dephosphorization slag composition was then further improved by induction furnace dephosphorization Analysis of dephosphorization rules has ,...

A PROCESS FOR REFINING STEEL IN INDUCTION FURNACE

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The furnaces greater than 5 ton sizes are popular in India to make steel using sponge iron Sponge iron in induction furnace is used as a substitute of steel scrap Usually such 4 furnaces are provided with acidic lining Impurities such as phosphorous, sulphur, carbon etc cannot be removed by lancing oxygen in the bath...

Desulphurization in a Ladle Furnace

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The principle of desulphurization is to transfer the sulfur dissolved in the liquid steel to a CaO-rich slag phase This process is typically carried out in a ladle furnace LF For this process to be successful, two conditions need to be fulfilled The slag must be fully liquid liquid fraction >09 This is required for kinetic reasons...

Sumitomo Metals Realizes High Efficiency ,

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Oct 20, 2010 0183 32 This process is also scheduled to be adopted at a new dephosphorization furnace due to begin operation this month at Sumitomo Metals Kokura The Kashima Steel Works has already realized internal recycling of ladle slag for contributing to further reduction in environmental load...

Production of low phosphorus steels from high phosphorus ,

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scrap, hot metal dephosphorization, removal of phosphorus during steelmaking and post treatment of liquid steel, At Tata Steel, about 60-65 of the phosphorus input into blast furnaces comes through the iron-bearing raw materials and rest through coke...

Problems of dephosphorization during steelmaking

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The thermodynamics of tapping, dephosphorization, and out-of-furnace treatment of steel in a ladle and the related phosphorus balance are considered, and the main technological and thermodynamic parameters for decreasing the metal dephosphorization are found...

J Activities Na20 CaO

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ISIJ International, Vol 29 1989 , No 4 curs on mixing of two binary silicates, ie, Na20-Si02 and CaO_-Si02, maynot be fery large at high Si02 concentrations In this work, the Na20 activities were measuredover a wide range of cornpositions low Si02 content and the results were compared with the Richardson s ideal mixing modelto be dis- cussed later Fig 5plots the ,...

Dephosphorization in the steelmaking process

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1 Too high furnace temperature will reverse the dephosphorization reaction 2 At the end of smelting and at the time of tapping, adding ferroalloys ,...

Research on the Dephosphorization Ladle Scheduling ,

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Ladle scheduling is to select and distribute the ladles based on the heat plan,providing that the process time of heats and the process requirement of the dephosphorization for heats are given The selection of dephosphorization ladle takes the performance index of maximum temperature, highest life, and the remaining online ladle life...

DEPHOSPHORIZATION OF STEEL PRODUCED FROM SPONGE ,

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The present work is an attempt at dephosphorizing the steel produced in the induction furnace route from DRI which is high in phosphorous upto 0096 are common A neutral lining is provided in the induction furnace and double slagging by the addition of Calcium Aluminate, Calcium Barium Aluminate and Barium Aluminate is adopted...

Metals Free Full

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Ladle furnace slag LFS is a by-product of a steel plant As the chemical composition and free lime f-CaO content of each batch of slag are significantly different, it is difficult to use the same operation method to recover LFS In this study, three types of LFS were used to partially replace lime in the dephosphorization process, and the compositions were adjusted to a fixed range ,...

Simulation and Application of Top Lance with Various Tilt ,

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Compared with the 45 176 oxygen lance, the content of phosphorus in semi-steel B was decreased by 0012 mass , the dephosphorization rate was increased by 79 and the content of T Fe loss was dropped by 19 mass It proved the oxygen lance with tilt angle could get a remarkable dephosphorization effect in a ladle furnace...

DEPHOSPHORIZATION OF STEEL PRODUCED FROM ,

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scale of steel formed through secondary route is alloy steel and plain carbon steel 2 In the present work, our objective is to set up preliminary info for dephosphorization of steel in 150 kg induction furnace As for the expulsion of phosphorous basic environment is desirable, the basicity is controlled by the addition of Barium Aluminate ....

Ladle Refining Furnace Secondary Metallurgy Doshi ,

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Ladle Refining Furnace Large ladles are used in most metal-melting operations to transfer molten metal from melting furnaces to refining or pouring stations The LRF also acts as a buffer between the steel making furnace and the continuous caster, reducing casting costs and allowing greater flexibility in steel making operations...

Common Misconceptions about Steel made through Arc Furnace ,

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Aug 27, 2020 0183 32 The arc furnace can complete the dephosphorization by the furnace slag, which also allows for sufficient expansion for the deoxidation process This is why the ability of the arc furnace to de-phosphorize is better than the induction furnace , So as long as the steel is ladle refined and vacuum degassing after induction melting, the quality ....

PDF Dephosphorization of Steelmaking Slag

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This slag may find application in refining of steel or iron making processes due to its high metal value and lime content provided phosphorus P2O5=1-45 is ,...

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