P•I 42.5 Portland cement (PC) and basic oxygen furnace slag (BOFS) utilized in this study procured from the local market, and the oxide and mineral compositions of raw materials underwent testing using X-ray fluorescence (XRF) and X-ray diffraction (XRD), with results presented in Table 1 and Fig. 1.Predominant mineral phases in BOFS include C 3 S, C …
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The investigated BOF slag was derived from the Tata Steel plant in IJmuiden, . The NetherlandsFor the hydrothermal treatment a slurry was prepared at a w/s of 0.3.
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Basic oxygen furnace slag (BOF slag), also known as Linz-Donauwitz slag, is an industrially by-product of the steel industry and produced during the converter process. In this research we have investigated the effect of grinding aids and particle fineness on the hydration of potassium citrate activated BOF slag. It was investigated the effects of five different grinding aids on the ...
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The slag generated in the basic oxygen furnace (BOF) and electric arc furnace (EAF) is of basic nature while the slag is of acidic nature in induction furnace because of the use of silica ramming mass as the lining material.
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Basic oxygen furnace slag (BOF slag), also known as Linz-Donauwitz slag, is an industrially by-product of the steel industry and produced during the converter process. ... The different milling of the BOF slag had the consequence that different particle size distribution curves are obtained. In [24], the BOF slag powder had a unimodal ...
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However, there are certain properties of the BOF slag that limits its use as supplementary cementitious material (SCM). The presence of free lime and free MgO can cause large volume expansion when hydrating [2], [3] and it has also low hydraulic reactivity as shown by previous isothermal calorimetry experiments [4], [5], [6].The low reactivity of BOF slag is …
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Due to the cementitious phases of C2S and C3S have been hydrated during the wet milling process to form Ca(OH)2 and C-S-H in the BOF slag mud, the cementitious activity of BOF slag mud is much ...
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This study investigates the stabilization of expansive soil using basic oxygen furnace (BOF) slag, an eco-friendly steel by-product, as an alternative to conventional stabilizers like ordinary Portland cement. By evaluating varying concentrations of BOF slag and lime as an activator, the research aims to improve the soil's mechanical properties, addressing issues like …
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Basic oxygen furnace (BOF) slag is a solid waste from the steel-making process route, also referred to as converter steel slag, annually produced in high quantities. ... The grinding procedure was performed using a Retsch RS 300 XL disc mill at a constant speed of 912 min −1 for 20 min and was selected for an input of 1 kg in a grinding jar ...
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Depending on the efficiency of the furnace, the iron content of basic-oxygen-furnace slag can vary between 10 to 40%. SiO2 content of basic-oxygen-furnace slag is much lower compared to blast-basic-oxygen-furnace slag as most of the silica impurities are already trapped in the blast-furnace slag. Large quantities of lime or dolomotic lime are ...
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A jaw-crusher, firstly, a rod mill grinder, secondly, and finally a hydraulic cone crusher were sequentially applied to the aggregates of 13 mm - 5 mm and below 5 mm. ... Wu CM, Du JC (2009) Laboratory investigation of basic oxygen furnace slag for substitution of aggregate in porous asphalt mixture. Construction and Building Materials 23(1 ...
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In the process of converting pig iron into steel, some co-products are generated—among which, basic oxygen furnace (BOF) slag is highlighted due to the great amount generated (about 126 kg of BOF slag per ton of steel grade). Great efforts have been made throughout the years toward finding an application to minimize the environmental impact …
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Accordingly, removing f-CaO to prevent BOF slag from expansion is the key for slag utilization. Despite many post-treatments of BOF slag having been tried, none of them have proved to …
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Introduction Slags in Steelmaking Plants - Types, Components and Possible Reuses Slag Types Blast Furnace (BF) Slag Basic Oxygen Furnace (BOF) Slag Electric Arc Furnace (EAF) Slag Secondary Metallurgy(SM) Slag Slag Main Components Silica Calcium Oxide Magnesium Oxide Aluminium Oxide Iron Oxides Metal Iron (10−40%wt) Possibilities of BOF Slag Recycle and
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According to the different steelmaking processes, steel slag can be classified into three types: Electric arc furnace (EAF) slag, basic oxygen furnace (BOF) slag and ladle furnace (BF) slag. The large capacity of steel slag can meet the needs of aggregates for road construction, and it has good mechanical properties and high alkalinity [12,13].
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Air granulated basic Oxygen furnace (BOF) slag application as a binder: Effect on strength, volumetric stability, hydration study, and environmental risk ... as shown in Fig. 2 (a) and, with the help of a jaw crusher model BB2 (Retsch), reduced to sand size. After crushing, the CSS was also sieved between 0.25 and 8 mm to achieve the same ...
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First, MTU researchers seek to increase the efficiency of iron unit recovery from BOF/BOP slag. Second, the project calls for the development of value-added feedstocks for steel mill furnaces …
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However, in the long run, these cost differences even out (WikiInvest) – so what is the primary tradeoff between setting up a BOF mill and an EAF mill? The answer lies in capital costs. For a BOF firm, the average cost per ton of capacity is $1,100, while the cost for an EAF minimill per ton of capacity is only $300.
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Rapid cooled basic oxygen furnace slag (RC-BOF-S) is derived from a new slag process called Baosteel Slag Short Flow, which involves treating molten steel slag with …
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2.1. BOF Slag LD steel mill slag (Figure2) is produced via the process of transforming pig iron obtained from the blast furnace [Sustainability 2020, 1213, x FOR PEER REVIEW ] when the impurities are removed by oxidation. 3 of 11 Figure 2. Basic oxygen furnace (BOF) slag generated during steel production.
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chemical composition of BOF slag and OPCs with high CaO and SiO. 2. concentration of >35 and >10 wt%, respectively [14]; iii) the similar mineralogical composition of BOF slag to OPCs, since the major phases of BOF slag are C. 2. S and . ORIGINAL ARTICLE. Abstract . An industrial by-product of the steel industry called basic oxygen furnace (BOF ...
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Moviator is a Finnish company specializing in the manufacturing of crushers, fine grinders and other slag processing equipment. We have our own slag processing line in Koverhar, Finland where we are handling BOF slag. OUR SPECIALITIES + EAF and BOF slag material crushing and fine grinding. After crushing the slag material the magnetic iron can ...
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SEM image of BOF slag after milling (on the left) and corresponding color phase map (on the right) generated with PARC software based on the EDX data.
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Treatment and disposal of Basic Oxygen Furnace (BOF) slag, ... [17]. However, the major drawbacks of these approaches include the required energy intensive steps (e.g. crushing/milling of the iron-rich monolith slag, prolonged mixing, pressurization, separation, and regeneration of extractants) and the generation of products having low market ...
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The slag generated from a steelmaking cycle is later processed, and the final product after processing is referred to as basic-oxygen-furnace slag (BOF slag). The chemical reactions occurring during the removal of impurities determine the chemical composition of the basic-oxygen-furnace slag [1, 3, 5]. 2.2.
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BOF slag is often inaccurately characterized in terms of phase composition by RQPA due to multiple reasons: i) the large number of phases (>5) and resulting peak overlap, ii) some phases may show preferred orientation (i.e. portlandite), iii) multiple polymorphs for some phases may be present (i.e. C 2 S) [24], iv) impurities within phases may have effect on the …
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BOF slag and the current status of development of new application technologies. 2. General Condition of Iron/Steel Slag 2.1 How iron/steel slag is produced ... an efficient process using crushers, magnetic separators, and screens (they are …
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In this paper, the results of an experimental campaign to better understand the effect of process conditions for carbonating BOF slag, to obtain the highest degree of …
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In basic oxygen furnace (BOF) steel production, also known as basic oxygen steelmaking (BOS) or the basic oxygen process (BOP), liquid iron (hot metal) is mixed with steel scrap and alloys to produce steel. ... Maintaining Slag Viscosity – High calcium quicklime helps maintain the viscosity of the slag to increase heat yield. Proper formation ...
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BASIC OXYGEN FURNACE The basic oxygen process is the most common process for producing steel. The basic oxygen furnace ( LD convertor) is a pear shaped vessel lined inside with refractory bricks . The vessel lining consists of tar bonded dolomite /magnesia carbon bricks or other refractories. The vessel can be rotated 360 o on its axis .
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