Utilization of EAFD in Concrete Composite

2017 ◽  
Vol 894 ◽  
pp. 72-75 ◽  
Author(s):  
Mohd Fadhil Nuruddin ◽  
Amir Fauzi ◽  
Mohamed Mubarak Abdul Wahab ◽  
Nasir Shafiq ◽  
Ahmad B. Malkawi
Keyword(s):  
Renewable Resources ◽  
Steel Industry ◽  
Setting Time ◽  
Electric Arc ◽  
Solid Wastes ◽  
Air Emissions ◽  
Arc Furnace ◽  
Replacement Level ◽  
Waste Products ◽  
Electrical Arc

Industrial waste products can be considered as renewable resources. Steel industry wastes have a severe impact on the environment whereas this industry involves a myriad of operations which create vast volumes of air emissions, liquid effluents, and solid wastes. This study presents the feasibility of using Electric Arc Furnace Dust (EAFD) as a cement replacement material (CRM) in comparison with silica fume (SF) and fly ash (FA). The EAFD is a complex byproduct material of steel produced by electrical - arc furnace and consisting mostly of metal oxides. The results showed that the workability of the EAFD mixes is comparable to the control mix even when the percentage of the EAFD was increased. On the other hand, as the replacement percentage was increased, the use of FA, SF resulted in higher, lower workability, respectively. Furthermore, the EAFD significantly affected the setting time, where 3% of the EAFD replacement resulted in prolonging setting time reached more than 24 hours, while the use of SF and FA has insignificantly affected the setting time. The 3% of EAFD is found to be the optimum replacement in terms of compressive strength and it has a similar effect to a replacement level of 5% of SF and 15% of FA.

scholarly journals Influence of electric arc furnace dust and lime kiln waste in Portland cement hydration

2020 ◽  
Vol 20 (4) ◽  
pp. 225-241
Author(s):  
Josué Claudio Metz ◽  
Elenize Ferreira Maciel ◽  
Marilise Garbin ◽  
Regina Célia Espinosa Modolo ◽  
Carlos Alberto Mendes Moraes ◽  
...  
Keyword(s):  
Portland Cement ◽  
Setting Time ◽  
Construction Materials ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Hydration Heat ◽  
Arc Furnace ◽  
Cement Pastes ◽  
Electric Arc Furnace Dust ◽  
Lime Kiln

Abstract Studies have indicated that the use of electric arc furnace dust (EAFD) results in a delay in the hydration time of Portland cement. Calcium-rich waste such as lime kiln waste (LKW) is one of the techniques used to offset this delay as it accounts for the lack of this element in calcium silicate hydrate (C-S-H) production in the mixture. The objective of this study was to evaluate the influence of electric arc furnace dust (EAFD) and lime kiln waste (LKW) in the hydration process of Portland cement pastes and their influence in setting time and hydration heat. The methodology used required several steps: physiochemical and micro-structural characterization of waste samples; definition and production cement pastes with different levels of waste substitution and a reference paste and evaluation of the cement pastes with respect to setting time and hydration heat. Results showed that the substitution of 1% EAFD with or without LKW presented similar hydration heats as the reference paste. This indicated that EAFD+LKW substitution would not affect substantially the hydration reactions of cement and could allow waste recycling in construction materials.

Computation of Chemical Exergy Potential in an Industrial AC Electric ARC Furnace

2005 ◽  
Vol 127 (1) ◽  
pp. 66-70 ◽  
Author(s):  
U¨nal C¸amdali ◽  
Murat Tunc¸
Keyword(s):  
Steel Industry ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Energy Costs ◽  
Iron And Steel Industry ◽  
Arc Furnace ◽  
Iron And Steel ◽  
Dead State ◽  
Chemical Exergy ◽  
Industrial Energy

Chemical exergy is equal to the maximum amount of work obtainable when the substance is brought from the environmental state to the dead state by a process involving heat transfer and exchange of substances only with the environment. As it is well known the iron and steel industry is the largest industrial energy consumer. After the employee costs, energy costs (about 30% of the total) represent the second highest cost element in integrated steel works. In this study, the chemical exergy potential in an electric arc furnace (EAF) is calculated and these potentials are distributed depending on production materials, emphasizing the chemical exergy concept.

scholarly journals Application of EAFDS/Lime Integrated System for the Removal of Cu and Mn from Industrial Effluent

2020 ◽  
Vol 6 (3) ◽  
Author(s):  
Forsido T ◽  
McCrindle RI ◽  
Maree J ◽  
Monyatsi ML
Keyword(s):  
Steel Industry ◽  
Industrial Effluent ◽  
Chemical Precipitation ◽  
Electric Arc ◽  
Integrated System ◽  
Arc Furnace ◽  
Human Beings ◽  
Metal Pollutants ◽  
Living Things ◽  
The Cost

Metal pollution is one of the significant concerns affecting the environment and the wellbeing of living things. Copper and manganese are the most common metal pollutants with detrimental effects on the health of human beings. Several methods have been proposed and applied for the treatment of industrial effluent and removal of hazardous metals. One of the most common treatment methods is chemical precipitation. This study is about application of chemical precipitation of copper and manganese metals from industrial acidic effluent in the presence of large concentration of other metals using a steel industry solid waste called Electric Arc Furnace Dust Slag (EAFDS) in conjunction with lime. The study proved that EAFDS alone can remove the target metals considerably and reducing the cost associated with the procurement of other costly chemicals. The concentration of Cu in the raw effluent was 47.2 mg/l. The slag reduced the concentration to 7.8 mg/l achieving 81.7 % removal. The concentration of Mn in the raw effluent was 120.8 mg/l, which was reduced to 12.0 mg/l with the slag only. The two metals were removed achieving 99.7 %with the addition of small amount of Ca(OH)2.

Waste Steel Slag and their Influence on the Properties of Cement Blends

MRS Advances ◽  
2018 ◽  
Vol 3 (34-35) ◽  
pp. 2027-2040
Author(s):  
Sunday O. Nwaubani
Keyword(s):  
Portland Cement ◽  
Setting Time ◽  
Waste Product ◽  
Steel Slag ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Industrial Wastes ◽  
Partial Replacement ◽  
Arc Furnace ◽  
Experimental Conditions

ABSTRACTThe use of waste is rapidly becoming a supra-disciplinary field in most parts of the world where the use of industrial wastes like fly ash, granulated steel slag, silica fume, and waste fibers in construction has become very popular since the last half of the 20th century. Other forms of industrial wastes are also re-used even for more sensitive applications on soils to upgrade soil texture. For example, waste from bauxite refining (red mud) is known to be extensively re-utilised. These concepts are yet to take tangible hold in Africa, despite the huge resources available. Electric-Arc Furnace Steel slag is a major waste product from the steel industry involving the melting of scrap to make steel in an electric arc furnace. Use of such waste materials in construction alleviates the huge environmental pollution problem which often exists in areas where they are produced and/or dumped. Currently, the material is mainly used in construction works as unbound aggregate for asphalt concrete pavements, or as road base in many countries. However, it consists predominantly of oxides and silicates of magnesium, calcium, aluminium, iron and thus can be used as substitute for cement. This paper compares the effect of utilising this type of Steel slag and Granulated Blast Furness Slag, as partial replacement for Portland cement. The influence of the physical and chemical characteristics of the two materials on the setting time, compressive strength, total porosity and pore-size distribution of cement pastes have been evaluated. For the experimental conditions studied, the result reveal adequate properties for high levels of replacement but suggests that superior qualities, compared with Portland cement concrete is possible only if replacement levels do not exceed about 10%.

scholarly journals Stabilization and solidification of electric arc furnace dust originating from steel industry by using low grade MgO

2015 ◽  
Vol 41 (4) ◽  
pp. 62-66 ◽  
Author(s):  
Ahmet Can Bayraktar ◽  
Edip Avşar ◽  
İsmail Toröz ◽  
Kadir Alp ◽  
Asude Hanedar
Keyword(s):  
Steel Industry ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Low Grade ◽  
Type I ◽  
Arc Furnace ◽  
Leaching Behavior ◽  
Electric Arc Furnace Dust ◽  
Binding Agents ◽  
Scrap Metals

Abstract In this study, solidification/stabilization (S/S) of electric arc furnace dust (EAFD) which is generated during the production of steel from scrap metals and classified as hazardous waste were investigated by using different ratios of cement and low grade MgO (LG MgO) as binding agents. Type I PC 42.5 R portland cement and LG MgO which contains 70–80% MgO were used. S/S blocks that contain different ratios of binding agents which have 1/0.5 – 1/1 – 1/2 – 1/3 – 1/4 – 1/5 cement/LG MgO ratio and S/S blocks which contain only cement and no LG MgO agents were prepared. These blocks, which contain 3 different waste ratios according to weight, 20%, 30% and 40% respectively, were produced and exposed to 28-day water purification. At the end of the purification process, S/S blocks were extracted using TCLP (Toxicity Characteristic Leaching Procedure) tests in order to determine the leaching behavior of Zn, Pb, and Cd in S/S blocks. By the end of this study, it was concluded that the recovery of EAFD is possible and applicable by immobilization. The findings of the study concluded that environmental performances or structural properties of blocks contain 30% waste by weight are suitable. This method is a proper one for recovering and treatment of EAFD with mixture of cement and LG MgO.

scholarly journals Synthesis of magnetic core–shell Fe3O4@TiO2 nanoparticles from electric arc furnace dust for photocatalytic degradation of steel mill wastewater

RSC Advances ◽  
2017 ◽  
Vol 7 (31) ◽  
pp. 19391-19405 ◽  
Author(s):  
Saeid Salamat ◽  
Habibollah Younesi ◽  
Nader Bahramifar
Keyword(s):  
Photocatalytic Degradation ◽  
Steel Industry ◽  
Sol Gel ◽  
Magnetic Core ◽  
Electric Arc ◽  
Core Shell ◽  
Arc Furnace ◽  
Steel Mill ◽  
Eaf Dust ◽  
Industry Wastewater

Fabrication of Fe3O4 from EAF dust using a hydrothermal method and Fe3O4@TiO2 using a sol–gel method for the photocatalytic degradation of steel industry wastewater.

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