scholarly journals Micro-Raman Spectroscopy Investigation of Crystalline Phases in EAF Slag

2020 ◽  
Vol 10 (12) ◽  
pp. 4115 ◽  
Author(s):  
Alessandro Riboldi ◽  
Laura Borgese ◽  
Irene Vassalini ◽  
Giovanna Cornacchia ◽  
Marcello Gelfi ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Slag Sample ◽  
Steel Production ◽  
Electric Arc ◽  
Powdered Sample ◽  
Arc Furnace ◽  
Crystalline Phases ◽  
Micro Raman Spectroscopy ◽  
Eaf Slag ◽  
Good Agreement

Electric arc furnace (EAF) slags were investigated by micro-Raman spectroscopy. A slag sample characterised by well-developed crystalline phases was obtained. The EDXS elemental composition made it possible to recognize the grains corresponding to the brownmillerite, larnite and magnesioferrite phases, as identified by XRD in the same powdered sample. The grains were collected and analysed by µ-Raman spectra, and the results showed good reproducibility in each grain and good agreement with spectra of the phases reported in the literature. A Raman database devoted to crystalline phases of EAF slag identification was created to be used by portable Raman instruments, allowing the phase characterisation of the slag directly during steel production.

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 Chemical Composition, pH Value, and Points of Zero Charge of High Calcium and High Iron Electric Arc Furnace Slag

2018 ◽  
Vol 7 (3.23) ◽  
pp. 1 ◽  
Author(s):  
Siti Zu Nurain Ahmad ◽  
Hamdan R ◽  
Wan Afnizan Wan Mohamed ◽  
N Othman ◽  
Nur Shaylinda Mohd Zin
Keyword(s):  
Chemical Composition ◽  
Calcium Oxide ◽  
Ferric Oxide ◽  
Ph Value ◽  
Steel Slag ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
High Calcium ◽  
Eaf Slag

Electric arc furnace (EAF) slag as filter media has been extensively used nowadays for wastewater treatment technology. Steel slag was produced as byproduct from steelmaking processes. However, different batches of steel slag production produce different composition. Thus, this study determined the chemical composition, pH value and points of zero charge (PZC) of two different samples of electric arc furnace (EAF) slag; high iron EAF slag (Slag HFe) and high calcium EAF slag (Slag HCa). The steel slag were characterized using X-ray Fluorescence Spectroscopy (XRF) analysis for the chemical composition, extraction with boiling water for pH value, and salt addition method for PZC. Slag HFe was mainly consisted of 38.2% ferric oxide and 20.4% calcium oxide, 10.20 pH value and pH 10.55 for PZC. While for Slag HCa, they were composed of 1.64% ferric oxide and 49.5% calcium oxide of pH value of 11.11 and pH 11.75 for PZC. Therefore, Slag HCa was considered as a more basic species compared to Slag HFe. 

scholarly journals Assessment of Electric Arc Furnace (EAF) Steel Slag Waste’s Recycling Options into Value Added Green Products: A Review

Metals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1347 ◽  
Author(s):  
Pao Ter Teo ◽  
Siti Koriah Zakaria ◽  
Siti Zuliana Salleh ◽  
Mustaffa Ali Azhar Taib ◽  
Nurulakmal Mohd Sharif ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Steel Slag ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Raw Material ◽  
Added Value ◽  
Arc Furnace ◽  
Separation Techniques ◽  
Eaf Slag ◽  
Physical And Chemical

Steel slag is one of the most common waste products from the steelmaking industry. Conventional methods of slag disposal can cause negative impacts on humans and the environment. In this paper, the process of steel and steel slag production, physical and chemical properties, and potential options of slag recycling were reviewed. Since steel is mainly produced through an electric arc furnace (EAF) in Malaysia, most of the recycling options reviewed in this paper focused on EAF slag and the strengths and weaknesses of each recycle option were outlined. Based on the reports from previous studies, it was found that only a portion of EAF slag is recycled into more straightforward, but lower added value applications such as aggregates for the construction industry and filter/absorber for wastewater treatments. On the other hand, higher added value recycling options for EAF slag that are more complicated such as incorporated as raw material for Portland cement and ceramic building materials remain at the laboratory testing stage. The main hurdle preventing EAF slag from being incorporated as a raw material for higher added value industrial applications is its inconsistent chemical composition. The chemical composition of EAF slag can vary based on the scrap metal used for steel production. For this, mineral separation techniques can be introduced to classify the EAF slag base on its physical and chemical compositions. We concluded that future research on recycling EAF slag should focus on separation techniques that diversify the recycling options for EAF slag, thereby increasing the waste product’s recycling rate.

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.

scholarly journals Plant Treatments of EAF Slag for its Use as Construction Materials

2013 ◽  
Vol 750-752 ◽  
pp. 1244-1253
Author(s):  
Qi Xing Yang ◽  
Björn Haase ◽  
Feng Lan Han ◽  
An Jun Xu ◽  
Fredrik Engström ◽  
...  
Keyword(s):  
Construction Materials ◽  
Steel Production ◽  
Electric Arc ◽  
Steel Plant ◽  
Production Rates ◽  
Electric Arc Furnaces ◽  
Arc Furnaces ◽  
Steel Grades ◽  
Eaf Slag ◽  
Test Operations

At the steel plant of Höganäs Sweden AB, different steel grades were produced using an Electric Arc Furnaces (EAF). The slag tapped by the EAF often disintegrated during cooling. Slag fines from the disintegration are difficult to handle and to use as materials in construction. The plant tests of EAF slag treatments using stabilizer MCP-F of high P2O5 content were thus conducted, with 1st and 2nd campaign adding 10 and 20 kg MCP-F/ton slag, respectively. The MCP-F addition in slag pots and other test operations were carried out smoothly, without impacting the EAF steel production. Rates P2O5 recovery in the EAF slag were lower in some test heats. Studies may thus be carried out in future to increase the P2O5 recovery from MCP-F, hence, achieving a higher efficiency of stabilization treatments for the slag from the EAF plant.

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).

scholarly journals Microwave-Supported Leaching of Electric Arc Furnace (EAF) Slag by Ammonium Salts

Minerals ◽  
2017 ◽  
Vol 7 (7) ◽  
pp. 119 ◽  
Author(s):  
Zhibo Tong ◽  
Guojun Ma ◽  
Xiang Zhang ◽  
Yongsheng Cai
Keyword(s):  
Electric Arc Furnace ◽  
Electric Arc ◽  
Ammonium Salts ◽  
Arc Furnace ◽  
Eaf Slag

Recycling of Malaysia’s electric arc furnace (EAF) slag waste into heavy-duty green ceramic tile

2014 ◽  
Vol 34 (12) ◽  
pp. 2697-2708 ◽  
Author(s):  
Pao-Ter Teo ◽  
Abu Seman Anasyida ◽  
Projjal Basu ◽  
Mohd Sharif Nurulakmal
Keyword(s):  
Ceramic Tile ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Heavy Duty ◽  
Eaf Slag ◽  
Slag Waste
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