The use of oxygen to decrease electrical energy useage in the electric Arc furnace

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  • English
National Library of Canada , Ottawa
SeriesCanadian theses = -- Thèses canadiennes
The Physical Object
Pagination2 microfiches : negative. --
ID Numbers
Open LibraryOL19150947M
ISBN 100612341488

The Use of Oxygen to Decrease Electrical Energy Usage in the Electric Arc Furnace. Nicholas George Kournetas A thesis submitted in confomrty with the requirements for the degree of. Master of Applied Science Graduate Deparbnent of the Facuity of Applied Science and Engineering University of Toronto @ Copyright by Nicholas George Koumetas, National Library Bibliothèque.

nationale du : Nicholas George Kournetas. Errors in composing of balance equations. The so-called “energy equivalent” of oxygen - the value which does not have any clear physical meaning.

Oxygen itself introduces no energy into a furnace. oxygen allows recovery of energy through CO post combustion which otherwise would be lost to the fume extraction system.

The amount of oxygen that is used in electric arc furnace is limited by the amount of oxygen that the process is capable of accepting. The oxygen consumption that would maximize the profit of each individual electric arc furnace is. and to reduce electrical energy – to replace electrical with chemical energy).

- Higher electrical energy consumption for induction furnace process (in range of ÷kwh/t compared with ÷ kWh/t for electric arc furnace for scrap based process for different charging practices).File Size: KB.

furnace-basic oxygen furnace (BF-BOF) route, this accounts for about 9% of the total energy required to produce the steel, including raw material extraction and steel production processes. In the electric arc furnace (EAF) route, this accounts for about 6% of total energy requirements 4 (for details regarding the steelmaking routes, see Figure 2).

The task of lowering energy consumption is a sound choice for the modern UHP electric-arc furnaces. Indeed, the utilization of water cooled elements has been applied in electric-arc furnaces for a long time (e.g., electrical feeders, electrodes), but the development of UHP furnaces in these last few years has made the cooling of the furnace Cited by: Benchmark study of the EAF plants using KT injection system (Case of long products – carbon steel production) F.

Memoli, V. Koester, C. Giavani In the last five years the amount of oxygen used into the Electric Arc Furnace has increased a lot. This fact depends, especially in areas like Western Europe, on the high cost of the electrical File Size: KB.

Steel industries recycle scrap steel using the electric arc furnace (EAF) by melting it and changing its chemical composition to produce different product grades. Obviously, steel industry is one of the greatest energy consuming sectors and there is a strong demand to decrease the use of electricity and other forms of energy in the EAF steel Cited by: 3.

The specific energy consumption (SEC) of the arc furnace is based on literature data by Worrell et al. () combined with a submodel that draws on the work of Cárdenas et al. It adjusts the energy consumption with regards to the metallisation of HBI and the amount of scrap charged to the by: One of the greatest consumers of electricity, electric arc furnaces (EAF), has been the subject of research in the steel production process.

The use of fuel burners and oxygen injectors1 assists greater use of chemical energy for a possible reduction in electrical energy consumption.

However, the. exothermic. The heat of released from these kind of reactions could help to decrease the electricity needed for fusion of iron and steel for metallurgical purposes in the electrical arc furnaces. So, we can reduce the consumption of electricity and save cost by blowing oxygen into the furnace.

Foamy slag practice is essential to use long arc practice and higher input into the EAF Coke breeze is injected at the slag/metal interface along with oxygen. Iron oxide of slag reacts with carbon, generates CO, causes foaming. An arc length of mm can be shielded with good foamy slag practice.

Foamy slag is good for ‘P’ removalFile Size: KB. use in the EAF has grown. Oxygen usage has increased from about scfhon (Nm3honne) in to as much as scfhon ( Nm3honne), saving 50 to kwh of electric energy per ton of steel produced and reducing tap-to-tap times by 3 to 6 minutes.

The rela- tionship between electric energy and oxygen consumption for the EAF is shown in Figure 4. It is nowFile Size: KB. effective viscosity to the electrical parameters of an electric arc furnace in order to reduce the instability of the electric arc itself and electric power consumption in the refining stage.

Materials and Methods Data from steel heats of a specific cold charge, produced during one year, were collected. The selected coldCited by: 2. The priority of the BSE oxygen injection technology is the effective use of chemical energy during the melting and refining stages so as to reach a highly productive furnace operation.

The arc. gasses into the furnace, i.e. oxygen and natural gas.

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Exothermic reactions were used to replace a substantial portion of the electrical energy input in the EAF. Whereas oxygen utilization of SCF/ton was considered the norm just 10 years ago, some operations now use more than SCF/ Size: 2MB.

Arc Furnace Electric Operation Parameters. The arc furnace equivalent circuit is very simple: X is the circuit reactance, V is the voltage without load, Va is the arc voltage and I is the current. The arc is resistive, so current has the same phase of the arc voltage. The arc voltage is defined by the arc length.

The electric arc furnace operation at the Štore Steel company, one of the largest flat spring steel producers in Europe, consists of charging, melting, refining the chemical composition, adjusting the temperature, and tapping.

Knowledge of the consumed energy within the individual electric arc operation steps is essential. The electric energy consumption during melting and refining was Cited by: 3. waste gas generated through this work is % less in comparison to another Electric Arc Furnace.

Details The use of oxygen to decrease electrical energy useage in the electric Arc furnace PDF

The average amount of energy that can be saved in the present study in terms of coke is KWh/ton. There is a huge amount of energy wasted in Electric Arc Furnace (EAF) industry which can be reused by application of proper Size: KB. Agnihotri A, Gupta M, Singh PK, Singh D, Tippannavar SS, Tuli SK, Rawat CP () Effect of foamy slag in electric arc furnace on energy efficiency.

In: ICS - 7th international congress on science and technology of steelmaking: the challenge of industry Google ScholarAuthor: Pasquale Cavaliere. In an electric arc furnace, scrap is melted using electricity. Natural gas can also supplement the melting process. Overall energy intensity of an electric arc furnace is significantly lower than the energy intensity of a basic oxygen furnace.

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The shift from using the basic oxygen furnace to the electric arc furnace since the early s has contributed to the substantial reduction in energy intensity in the U.

Normally a positive ECC leads to a reduction in the consumption of electrical energy consumption and is always desired where bulk oxygen is available for blowing in the electric arc furnace. A negative ECC leads to bath decarburization.

at Tubos de Acero de Mexico, SA (TAMSA) in late The technology was used to optimize the use of chemical energy within the electric arc furnace (EAF). The project was a success providing TAMSA a % reduction in conversion costs (oxygen, methane, electricity and carbon) and a reduction of 1 minute in power-on-time.

Using the best power system, that is, as high as possible voltage and current ratio and short heat shutdown time, to maintain full load power operation, so that electric energy in a high utilization state. This will reduce energy consumption and graphite electrode consumption.

An important development of the modular chemical energy system layout, jet flowrate and jet length was implemented in electric arc furnace (EAF) at Ezz Flat Steel plant to reduce electrical energy consumption, avoid skull formation, reduce refractory consumption and improve foaming slag.

This development was conducted in by: 1. Oxygen lancing contributes to the furnace chemical energy by consuming carbon in the bath and increasing the bath temperature.

Excess burner oxygen helps to prevent chemical energy waste by scavenging combustible gases in the freeboard. Using theses control variables, the results of. It can be said, that to increase the energy efficiency of the electric arc furnaces the main opportunity is in the use of longer arcs in presence of scrap to increase the arc thermal radiation; another fact is that the average power needs to be reduced in order to reduce the energy consumption Cited by: 4.

An electric arc furnace (EAF) is a furnace that heats charged material by means of an electric arc. Industrial arc furnaces range in size from small units of approximately one ton capacity (used in foundries for producing cast iron products) up to about ton units used for secondary furnaces used in research laboratories and by dentists may have a capacity of only a few.

Nitrogen is difficult to remove in electric arc furnace (EAF) steelmaking, requiring the use of more energy in the oxygen steelmaking route to produce low-nitrogen steel.

The objective of this work was to determine if the injection of directly reduced iron (DRI) fines into EAFs could reduce the nitrogen content by creating fine carbon monoxide.

The electric arc furnace is more modern than the former and produces its product using scrap steel material, which is tossed into the furnace with the help of a large crane. A lid containing electrodes is then placed on top of and lowered into the furnace, where they conduct an electric current which takes the shape on an arc.

source of iron for, and promoting the use of, electric-arc-furnace (EAF) processes. This rapid increase in crude steel production has also resulted in significant increases, as shown in Fig. 3, in the prices of iron ore and coking coal, the principal raw materials of iron and steel.3) There are some background factors: e.g., i) the current BF.Electric Arc Furnace (EAF) Steelmaking technology became hundred years old in the year Though De Laval had patented an electric fumace for melting and refining iron in and Heroult had demonstrated electric arc melting of ferro-alloys betvleen andthe first industrial EAr steelmaking operations only came intoCited by: 3.Cost Effectiveness Analysis of HYL and drex DRI Te chnologies for the Iron and Steel-king Industry Pa ge | 7 Steel Making Process and CO EmissionsEmissionsEmissions Steel is primarily made by one of two processes: the blast - basic oxygen furnace (BF-BOF), and the electric arc furnace (EAF).

The BF-BOF is a two-step process.