A slag prediction model in an electric arc furnace process for special steel production

In this paper, energy and exergy analysis of an existing steel electric arc furnace (EAF) was performed to estimate the furnace potential for increasing the efficiency and decreasing the electrical energy consumption. The results of analysis show that the energy and exergy efficiencies of the furnace are 56.9% and 40.5%, respectively. Field data show that mass flow rate of hot flue gas is around 10.4 kg/s in average which contains 18.3% and 12.2% of total input energy and exergy, respectively. By using energy of flue gas for preheating the sponge iron, electrical energy consumption of the furnace could be reduced up to 88 GJ which means 21.2% reduction in electrical energy consumption and 13.6% increase in steel production. Also, exergy efficiency improves about 10.8% by using preheating scheme.

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Calculation of View Factors in Electric Arc Furnace Process Modeling

steel research international ◽

10.1002/srin.202000341 ◽

2020 ◽

pp. 2000341

Author(s):

Thomas Hay ◽

Jesus Hernandez ◽

Suzanne Roberts ◽

Thomas Echterhof

Keyword(s):

Process Modeling ◽

Electric Arc Furnace ◽

Electric Arc ◽

Arc Furnace ◽

Furnace Process ◽

View Factors

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Briquetting of EAF Dust for its Utilisation in Metallurgical Processes

Chemical and Process Engineering ◽

10.1515/cpe-2015-0018 ◽

2015 ◽

Vol 36 (2) ◽

pp. 263-271 ◽

Cited By ~ 6

Author(s):

Aneta Magdziarz ◽

Monika Kuźnia ◽

Michał Bembenek ◽

Paweł Gara ◽

Marek Hryniewicz

Keyword(s):

Shaft Furnace ◽

Steel Production ◽

Hydrated Lime ◽

Electric Arc Furnace ◽

Electric Arc ◽

Arc Furnace ◽

High Iron Content ◽

Coke Content ◽

Eaf Dust ◽

To Receive

Abstract Dust generated at an electric arc furnace during steel production industry is still not a solved problem. Electric arc furnace dust (EAF) is a hazardous solid waste. Sintering of well-prepared briquetted mixtures in a shaft furnace is one of possible methods of EAFD utilisation. Simultaneously some metal oxides from exhaust gases can be separated. In this way, various metals are obtained, particularly zinc is recovered. As a result, zinc-free briquettes are received with high iron content which can be used in the steelmaking process. The purpose of the research was selecting the appropriate chemical composition of briquettes of the required strength and coke content necessary for the reduction of zinc oxide in a shaft furnace. Based on the results of the research the composition of the briquettes was selected. The best binder hydrated lime and sugar molasses and the range of proper moisture of mixture to receive briquettes of high mechanical strength were also chosen and tested. Additionally, in order to determine the thermal stability for the selected mixtures for briquetting thermal analysis was performed. A technological line of briquetting was developed to apply in a steelworks.

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Processing and Recycling Experiments of Dust from Electric Arc Furnace

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.378-379.719 ◽

2011 ◽

Vol 378-379 ◽

pp. 719-722 ◽

Cited By ~ 2

Author(s):

Zorica Bacinschi ◽

Cristiana Zizi Rizescu ◽

Elena Valentina Stoian ◽

Dan Nicolae Ungureanu ◽

Aurora Anca Poinescu ◽

...

Keyword(s):

Steel Production ◽

Electric Arc Furnace ◽

Electric Arc ◽

Raw Material ◽

Arc Furnace ◽

Leaching Test ◽

Fine Grained ◽

Steel Making ◽

Fine Grained Material ◽

The Impact

The processing and recycling experiments of dust from Electric Arc Furnace (EAF) in industrial conditions aimed at highlighting the minimizing possibility of this waste by transforming it into a by-product that can represent either a secondary raw material for steel making in EAF or to recover iron, zinc and lead (the Waltz process). Electric-arc furnace dust (EAFD) is a by-product of steel production and recycling. This fine-grained material contains high amounts of zinc and iron as well as significant amounts of potentially toxic elements such as lead, cadmium and chromium. Therefore, the treatment and stabilization of this industrial residue is necessary. Leaching test is a method of evaluating the impact of waste that is stored (soil, water table).

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