Synthesis of Value-Added Ferrous Material from Electric Arc Furnace (EAF) Slag and Spent Coffee Grounds

JOM ◽  
2021 ◽  
Author(s):  
Smitirupa Biswal ◽  
Farshid Pahlevani ◽  
Veena Sahajwalla
Keyword(s):  
Value Added ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Spent Coffee Grounds ◽  
Ferrous Material ◽  
Coffee Grounds ◽  
Eaf Slag

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 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

Influence of acid type and concentration on the synthesis of nanostructured titanium dioxide photocatalysts from titanium-bearing electric arc furnace molten slag

RSC Advances ◽  
2015 ◽  
Vol 5 (18) ◽  
pp. 13478-13487 ◽  
Author(s):  
Yang Li ◽  
Yang Yang ◽  
Min Guo ◽  
Mei Zhang
Keyword(s):  
Titanium Dioxide ◽  
Molten Slag ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Nanostructured Titanium ◽  
Acid Type ◽  
Eaf Slag ◽  
Crystal Phases

TiO2 photocatalysts with different crystal phases and morphologies were synthesized from Ti-bearing EAF slag.

scholarly journals Innovative Reuse of Electric Arc Furnace Slag as Filler for Different Polymer Matrixes

Minerals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 832
Author(s):  
Anna Gobetti ◽  
Giovanna Cornacchia ◽  
Giorgio Ramorino
Keyword(s):  
Electric Arc Furnace ◽  
Electric Arc ◽  
Environmental Benefits ◽  
Butadiene Rubber ◽  
Arc Furnace ◽  
Sem Images ◽  
Neat Polymer ◽  
Hardness Tests ◽  
Eaf Slag ◽  
Electric Arc Furnace Slag

The European steel industry produces about 70 million tons/year of steel by the electric arc furnace (EAF). The slag consists of about 15% by weight of the produced steel, thus from the perspective of the circular economy, it has a high potential as a co-product. This research aims to assess an innovative reuse of EAF slag as filler in different polymer matrixes: thermoplastic (polypropylene), thermosetting (epoxy resin), elastomeric (nitrile butadiene rubber), and recycled end of life rubber tire. A comparison between neat polymer and polymer filled with a certain amount of EAF slag has been carried out by tensile (or flexural), compression, and hardness tests. Experimental results show that slag as a filler increases the composites’ hardness and elastic modulus at the expense of toughness. For a safe reuse of the slag, the leaching of hazardous elements must comply with current legislation. It was found that, although the used EAF slag releases small amounts of Cr, Mo, and V, incorporating it into a polymer matrix reduces the leaching. The EAF slag particles distribution has been observed by scanning electron microscopy (SEM) images. The obtained results show good technical feasibility of this innovative slag application so that it could pave the way to a new industrial symbiosis between dissimilar sectors, bringing economic and environmental benefits.

Production of metallic iron from electric arc furnace (EAF) slag using palm shells char/coke blends

2021 ◽  
Author(s):  
A. N. Ismail ◽  
N. F. D. M. Yunos ◽  
M. S. R. Rajeswari ◽  
M. A. Idris
Keyword(s):  
Metallic Iron ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Eaf Slag

Use of Electric Arc Furnace Slag for High Strength Concrete Production

2016 ◽  
Vol 847 ◽  
pp. 537-543
Author(s):  
Flora Faleschini ◽  
Mariano Angelo Zanini ◽  
Katya Brunelli ◽  
Carlo Pellegrino
Keyword(s):  
Microstructural Analysis ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Environmental Benefits ◽  
Recycled Aggregates ◽  
Arc Furnace ◽  
Concrete Production ◽  
Eaf Slag ◽  
Electric Arc Furnace Slag ◽  
Furnace Slag

In this paper the use of Electric Arc Furnace slag (EAF slag) for the production of High-Performances Concrete (HPC) is explored, as a fully replacement of the natural gravel. Several mixtures were produced, varying the water/cement ratio, the cement and the admixture content, with the aim of reaching a strength class between C50/60 and C60/75, and an S4 consistency class, as defined in EN 206-1. Mechanical properties of EAF concretes were compared with reference conglomerates; a complementary microstructural analysis was performed, with SEM observation after concrete specimens' failure. Results indicate that the use of EAF slag in concrete allows reaching higher compressive strength than with coarse natural aggregates. Lastly, the environmental benefits obtained through the use of recycled aggregates are shown, by means of the application of a Life Cycle Assessment (LCA) tool properly developed for this scope.

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