Electric Arc Furnace slag (EAF slag) can substitute natural aggregates in asphalt and concrete mixes. It is a by-product that has been used for decades in Europe, USA and Japan in construction due to its unique physical and mechanical properties. Electric arc furnace slag. Electric arc furnace slag is produced during the manufacture of crude steel by the electric arc furnace (EAF) process.In this process steel scrap with additions of fluxes (e.g., lime[stone] and/or dolomite) are heated to a liquid state by means of an electric current.
An electric arc furnace (EAF) is a furnace that heats charged material by means of an electric arc. Industrial arc furnaces range in size from small units of approximately one ton capacity (used in foundries for producing cast iron products) up to about 400 ton units used for secondary steelmaking. Dec 06, 2004· This paper describes the work carried out in laboratory to produce concrete with good properties using oxidizing electric arc furnace (EAF) slag as fine and coarse aggregate. To do this, the slag obtained in the steelmaking process must be crushed and stabilized. First, a suitable mortar must be made and tested.
Nowadays, the steelmaking industry has been transformed where plants, such as electric arc furnaces are used for more than 40% of global steel production in the world . This renewed industry has led to the appearance of a new by-product: electric arc furnace oxidizing slag or black slag (EAFs). Dec 06, 2004· This paper describes the work carried out in laboratory to produce concrete with good properties using oxidizing electric arc furnace (EAF) slag as fine and coarse aggregate. To do this, the slag obtained in the steelmaking process must be crushed and stabilized. First, a suitable mortar must be made and tested.
Electric Arc Furnace (EAF) : Charged material is heated to a liquid state by means of an electric current. The electricity has no electrochemical effect on the metal making it perfectly suited for melting scrap. Steel slag is processed as an air-cooled material. The free metallics are magnetically separated and sized into construction ... Blast Furnace Slag (BFS) from the crude or pig iron production in blast furnace. Steel slag from a Basic Oxygen Furnace (BOF) and the Electric Arc Furnace (EAF). Ladle refining slag from the steel refining processes in the ladles. The blast furnace slag after granulation and grinding finds extensive use in cement and concrete.
PDF | Electric arc furnace oxidizing slag (EAFS) is a by-product of the steelmaking industry, generated after the melting and the preliminary acid refining of liquid steel. It is a stony material ... Electric Arc Furnace Slag and Blast Furnace Dust, Use for the Manufacture of Asphalt Concrete for Roads Ochoa, R.1* and López, A.2 1 Ph.D. Candidate, Faculty of Engineering, Universidad Pedagógica y Tecnológica de Colombia, Tunja, Colombia.
Abstract. Electric arc furnace (EAF) slag is a by-product of steel production in electric arc furnaces. Several studies have tried to demonstrate its suitability in civil engineering application, such as in bituminous mixtures and cement-based materials, due to its … The content of iron oxides (FeO x) in common Portland cement ranges between 3 and 6%.Possible sources for iron oxide are iron ore or, more preferably, byproducts of the steel processing industry such as mill scale or electric arc furnace slag (EAFc slag).
Slag Cleaning Furnace. In this furnace, copper rich oxide slags are melted in electric arc furnaces and coke & copper pyrite are added to reduce copper content in the slag. In order to increase reaction rate, slag is over-heated to produce low viscosity aggressive slag. Keywords: Bituminous pavement, electric arc furnace, slag, fatigue, coarse aggregate 1. ELECTRIC ARC FURNACE SLAG (EAFS) 1.1 Introduction EAF slag is the main waste stream in the secondary metallurgy phase, with production levels of about 120-170 kg. per ton of steel.
In the context of recycled concrete, the use of electric arc furnace (EAF) slag as partial or full replacement of coarse natural aggregates is particularly appealing because of the resulting ... ELECTRIC ARC FURNACE SLAG Electric arc furnace slag (EAFS) is a byproduct that outcomes from the 3rd phase of the metallurgical process, fine grained (90% grain size less than 2mm), 98% amorphous (due to sudden cooling into water), consisted mainly of SiO2 (about 40%), FeO (about 35%) and other oxides (of Al, Mg, Cr, and Ca ).
Apr 27, 2019· Therefore, in order to confirm the possibility of using electric arc furnace (EAF) oxidizing slag as a binder, a comparative assessment of the mechanical properties of concrete containing electric arc furnace oxidizing slag, steel-making slag, and granulated blast furnace (GBF) slag was performed. Utilization of Electric Arc Furnace Slag as Aggregates in Concrete -- Environmental Issue by R. Alizadeh, M. Chini, P. Ghods, M. Hoseini, Sh. Montazer, M. Shekarchi Synopsis : Electric Arc Furnace Slag (EAFS) that contains low percentage of amorphous silica and high content of ferric oxides and consequently has low
Abstract. The aim of this section is to comprehensively investigate the possibility of substituting natural aggregates with Black/Oxidizing Electric Arc Furnace (EAF) slag, at high replacement ratios, to produce structural concrete. J. Tasker, in Encyclopedia of Materials: Science and Technology, 2001. 2 Manufacture. Electric arc furnace melting is the primary method of manufacture in steel foundries. A basic lined furnace is necessary since the manganese slag will readily attack acid refractories.
Electric Arc Furnace Refractory. An Electric Arc Furnace (EAF) is a firebrick-lined U-shaped steel making vessel installed with a retractable roof where graphite electrodes enter the furnace. Typically lined with resin-bonded magnesia-carbon products that permit the eaf operator to run with slags that are neutral to very basic in composition. pH Due to the effects of the limestone it contains, the pH of iron and steel slag increases to 10 – 12 when it reacts with water, indicating alkalinity that is the same or lower than that of recycled concrete base course material and cement-stabilized soil.
This paper deals with the use of industrial by-products from electric arc furnace (EAF) granulated slag for the partial replacement of natural aggregates commonly used to manufacture concrete. Utilization of electric arc furnace slag (EAF slag) as blending material for Portland cement has been examined. This was done via the investigation of the hydration characteristic of EAF slag – Portland cement blended mixtures. Various ratios of EAF slag were used namely; 5, 10 and 20 wt% of solid mix.
Aug 15, 2015· Furthermore, other operations such as the "foaming" of the slag in the electric arc furnace, the pouring process, and slag cooling method to room temperature all form part of the steelmaking process. There are at least two methods for cooling EAFS, from furnace temperatures to room temperature. When used as a constituent of raw meal for cement kiln, electric arc furnace (EAF) slag, being a source of non-carbonated lime, can contribute to a sustainable development in as much as both the kiln thermal requirement and CO2 generation are reduced.
use as an admixture in concrete. Therefore, in order to conﬁrm the possibility of using electric arc furnace (EAF) oxidizing slag as a binder, a comparative assessment of the mechanical properties of concrete containing electric arc furnace oxidizing slag, steel-making slag, and granulated blast furnace (GBF) slag was performed. Utilization of Electric Arc Furnace Slag as Aggregates in Concrete -- Environmental Issue by R. Alizadeh, M. Chini, P. Ghods, M. Hoseini, Sh. Montazer, M. Shekarchi Synopsis : Electric Arc Furnace Slag (EAFS) that contains low percentage of amorphous silica and high content of ferric oxides and consequently has low
APPLICATION OF ELECTRIC ARC FURNACE SLAG ... cement and in civil engineering as an additive for road construction. Key words: electric arc furnace slag, soil enhance, cement, road construction . 437 1. INTRODUCTION Steel making process in electric arc furnaces generates up to 15 % of slag … The electric arc furnace slag generally used as a substitute for natural aggregate in concrete is sharp-cornered with a honeycombed surface texture. This characteristic can be useful to develop very strong interlocking properties  .
Electric arc furnace (EAF) slag, a by-product of steelmaking recovered after the oxidizing process, is useful when employed as aggregate in hydraulic concrete and bituminous mixtures. Utilization of steel melting electric arc furnace slag for development of vitreous ceramic tiles 295 shows wustite (FeO) and gehlenite (2CaO, Al2O3, SiO2) as the major phase and bredigite (14CaO 2MgO 8SiO 2) as the minor one.
Blast furnace slag is used in blended cement. Although many studies have been conducted on the evaluation of the electric arc furnace slag to be use in concrete as aggregates replacing natural aggregates, no studies have been performed regarding the use of induction furnace slag in concrete as aggregates replacing natural aggregates. Utilization of electric arc furnace steel slags in concrete products ... Electric arc furnace slag (EAFS) was tested and used as a concrete aggregate, and ladle furnace slag –raw or processed by ...
This paper analyzes how feasible it is to use electric arc furnace slag as coarse aggregate, and blast furnace dust as fine aggregate in the manufacture of hot asphalt concrete for roads. Three mixtures were designed using the Ramcodes methodology, the M1 mixture of control with conventional materials, the M2 mixture replacing 50% and the M3 mixture replacing of the conventional ...