The Study of Additive Variation in Smelting Process of Sponge Iron into Pig Iron on the Fe Content and Fe Recovery Using Electric Arc Furnace

2019 ◽  
Vol 964 ◽  
pp. 55-61
Author(s):  
Sungging Pintowantoro ◽  
Fakhreza Abdul ◽  
Imam Prasetyo ◽  
Angga Dharma
Keyword(s):  
Steel Production ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Sponge Iron ◽  
Smelting Process ◽  
Pig Iron ◽  
Arc Furnace ◽  
Production Chain ◽  
Iron Smelting ◽  
Fe Content

Iron sand as the largest form of iron ore reserves in Indonesia has not been optimized properly for domestic iron-steel production. In the production chain of pig iron from iron sand, there is a problem that in sponge iron (result of direct reduction) contains many impurities, especially titanium. This research is conducted to determine the effect of additive variation to the Fe content and Fe recovery during sponge iron smelting process into pig iron using electric arc furnace (EAF). Types of additives variation that used in this research are CaCl2 and CaC2, as well as smelting without additive as comparison. Briquettes made from sponge iron, coal, flux (SiO2), and variations of additive are melted in crucible using EAF (16.2 Volt; 180 Ampere) for 6 minutes. Based on EDX and XRD results of pig iron and slag, the optimum process of sponge iron smelting is use the CaCl2 as additive. It’s shown by the result that the pig iron containing the highest %wt Fe by 90.97% and the highest Fe recovery by 80.41%. The product that used CaC2 as additive has Fe content of 89.31 %wt and Fe recovery during process of 72.36%. Meanwhile, the results obtained from the smelting without additives only shows that the Fe content in pig iron amounted to 88.90 %wt and 68.76% values for Fe Recovery.

scholarly journals Briquette smelting in electric arc furnace to recycle wastes from stainless steel production

2015 ◽  
Vol 22 (S1) ◽  
pp. 10-16 ◽  
Author(s):  
Qi-xing Yang ◽  
An-jun Xu ◽  
Peng Xue ◽  
Dong-feng He ◽  
Jian-li Li ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Steel Production ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Stainless Steel Production

Exergy Analysis of Steel Electric Arc Furnace

2010 ◽  
Author(s):  
Ebrahim Hajidavalloo ◽  
Hamzeh Dashti
Keyword(s):  
Energy Consumption ◽  
Flue Gas ◽  
Exergy Analysis ◽  
Steel Production ◽  
Electrical Energy ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Electrical Energy Consumption ◽  
Energy And Exergy

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.

scholarly journals Briquetting of EAF Dust for its Utilisation in Metallurgical Processes

2015 ◽  
Vol 36 (2) ◽  
pp. 263-271 ◽  
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.

Processing and Recycling Experiments of Dust from Electric Arc Furnace

2011 ◽  
Vol 378-379 ◽  
pp. 719-722 ◽  
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).

Recycling of Electric Arc Furnace Dust by Adding to Hot Metal

2012 ◽  
Vol 727-728 ◽  
pp. 1740-1745
Author(s):  
Vicente de Paulo Ferreira Marques Sobrinho ◽  
José Roberto de Oliveira ◽  
Victor Bridi Telles ◽  
Felipe Fardin Grillo ◽  
Jorge Alberto Soares Tenório ◽  
...  
Keyword(s):  
Electric Arc Furnace ◽  
Particle Size Analysis ◽  
Electric Arc ◽  
Size Analysis ◽  
Pig Iron ◽  
Arc Furnace ◽  
Hot Metal ◽  
Experimental Conditions ◽  
Electric Arc Furnace Dust ◽  
Fusion Experiments

This research aims to study the process of incorporation of the metal iron contained in electric arc furnace dust (EAFD), by addition in hot metal at a temperature of 1,400 degrees Celsius altering experimental conditions such as how to add the EAFD (“as received” and in the form of briquettes), the percentage of EAFD to be added (10, 20 and 30% of initial weight of sample pig iron). The time of withdrawal of the sample of pig iron and slag (30 minutes after the addition of EAFD). Previously, the EAFD will be characterized using the following techniques: chemical analysis, particle size analysis, X-ray diffraction, scanning electron microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) microanalysis. After characterization, the electric arc furnace dust to be added to the bath of liquid iron, will be divided into 2 types: the first order of addition will be in the form "as received" from the plant and the second is through the agglomeration of EAFD in the form of briquettes. The achievement of fusion experiments in laboratory scale will take place in a vertical tubular furnace with temperature control. The fusion experiments to assess the incorporation of the metal iron will use graphite crucibles. A flow of inert gas (argon) will be maintained inside the furnace during the experiments. It is expected that the results obtained at the end of the research allow the evaluation of the iron metal incorporation of electric arc furnace dust in pig iron bath.

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

2021 ◽  
Vol 54 ◽  
pp. 178-183
Author(s):  
Maialen Murua ◽  
Fernando Boto ◽  
Eva Anglada ◽  
Jose Mari Cabero ◽  
Leixuri Fernandez
Keyword(s):  
Prediction Model ◽  
Steel Production ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Furnace Process ◽  
Special Steel

scholarly journals Process Improvements for Direct Reduced Iron Melting in the Electric Arc Furnace with Emphasis on Slag Operation

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 402
Author(s):  
Marcus Kirschen ◽  
Thomas Hay ◽  
Thomas Echterhof
Keyword(s):  
Steel Production ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Raw Material ◽  
Steel Scrap ◽  
Process Conditions ◽  
Arc Furnace ◽  
Process Improvements ◽  
Direct Reduced Iron ◽  
Arc Furnaces

Steelmaking based on direct reduced iron (DRI, and its compacted derivative hot briquetted iron, HBI) is an anticipated important global alternative to current steel production based on FeOx reduction in blast furnaces due to its lower specific CO2 emission. The majority of DRI is melted and refined in the electric arc furnace with different process conditions compared to the melting of steel scrap due to its raw material composition being rather different. We provide data and analysis of slag composition of DRI charges vs. steel scrap charges for 16 industrial electric arc furnaces (EAFs). Suggestions for optimized slag operation and resulting process improvements of DRI melting in the EAF are given. A dynamic mass and energy model of the DRI melting in the EAF is introduced to illustrate the implications of the adapted slag operation on the EAF process with DRI charges.

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