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The influence of vegetable oil and steel slag aggregates on the drying shrinkage and carbonation performance of steel slag-based alkali activated materials was investigated. Decrease in carbonation rates by up to 19% attributed to the formation of metal soap phases which strongly reduced the gel and small capillary porosity as well as the ...
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Typical morphology of steel slag [].(a) BOF steel slag.(b) EAF steel slag.(c) LF steel slag.BOF steel slag is the solid waste produced in the converter steelmaking process, and its discharge is approximately 100–150 kg per ton of BOF steel [20,21,22,23].BOF steel slag commonly has a grayish-white appearance and a vesicular nature, with many non-interconnected pores [].
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Steel slag is a by-product of the steel production process, accounting for approximately 15% of the whole crude steel output [1].The accumulation of untreated steel slag not only occupies a significant amount of land but also leads to the leaching of heavy metal ions (such as vanadium, chromium, arsenic, lead, cadmium), polluting surrounding water sources …
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About Steel Slag: Steel slag is an industrial byproduct obtained from the steel manufacturing industry.; It is produced in large quantities during steel-making operations that use electric arc furnaces. It can also be produced by smelting iron ore in a basic oxygen furnace.; Primarily, slag consists of calcium, magnesium, manganese and aluminium silicates and …
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Steel slag is one of the most common waste products from the steel making industry. In this research, building bricks based on electric arc furnace (EAF) slag were examined. ... Miocene (B) clays and steel slag (Ss) blend yielded different colors without deformation when fired at different temperatures and with increased slag contents. The ...
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steel slag by using hydrochloric acid leaching ... with lighter color contain a higher proportion of Fe, Mg, Mn and Al while the shady areas contain a higher proportion of Ca and Si [8]. EAF steel slag of 2 samples was analysed by using energy-dispersive x-ray spectroscopy. The primary elements found in the sample A included 29.93% CaO
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Steel slag, an industrial by-product, has found new applications in road construction due to its unique chemical and physical properties [28], ... Thermal maps use different colors to represent areas of different temperatures. Usually, high-temperature areas are represented by red, and low-temperature areas are represented by blue or black. ...
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As a kind of industrial waste in steel manufacturing, steel slag accounts for about 12–15% of steel output [1], [2].China's crude steel output reached 1.03 billion tons in 2021, with steel slag produced exceeding 120 million tons [3].At present, the amount of steel slag stacked in China has reached 1 billion tons, which will cause serious waste of resources and pollution to …
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The steel slag and steel slag powder were utilized as a partial replacement for coarse aggregate, (the size range of 4.75–12.5 mm) and a filler replacement (particles smaller than 75 μm), respectively. The steel slag was provided by the Mobarakeh Steel Company in …
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Currently, steel slag has been widely used in many fields such as road construction, soil improvement and building materials. In particular, the mineral composition of steel slag is similar to that of cement clinker, including various oxides such as amorphous silica (SiO 2), magnesium oxide (MgO), alumina (Al 2 O 3), iron oxide (FeO/Fe 2 O 3 /Fe), manganese oxide (MnO/Mn 3 …
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Steel slag is a calcium-rich heterogeneous solid consisting of several solid phases. The calcium in the slag can exist in multiple forms: dicalcium silicate, calcium oxide, calcium carbonate, …
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After the color is stable, the depth of chloride ion penetration is used to measure the thickness of the coloring area. ... In this study, steel slag was subjected to wet CO 2 mineralization, and a comparative analysis was conducted on the microstructure, phase composition, and particle size of the steel slag both prior to and following the ...
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The utilization of solid waste steel slag as the main ingredient contributes to the cost reduction of heat storage ceramics. To quantify the raw material cost advantage of steel slag-based ceramics over the most widely used SiC and Al 2 O 3 ceramics, their costs are analyzed. In general, the cost of thermal storage ceramics mainly includes raw materials and fuel.
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Steel slag's usage is related to its physico-chemical characteristics. The density of steel slag is 3.3–3.6 g/cm 3. Steel slag is hard because of its high Fe amount and is highly resistant to corrosion. The grindability index of steel slag is 0.7 [38]. Steel slag primarily consists of SiO 2, CaO, Fe 2 O 3, FeO, Al 2 O 3, MgO, MnO, and P 2 O 5 ...
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Compare to the oxide composition of OPC and GGBS, steel and stainless steel slags generally contain less lime (CaO), silica (SiO2) and alumina (Al2O3), but contain more quantities of ferric …
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Steel slag is a by-product of the steel industry and usually contains a high amount of f-CaO and f-MgO, which will result in serious soundness problems once used as a binding material and/or aggregates. To relieve this negative effect, carbonation treatment was believed to be one of the available and reliable methods. By carbonation treatment of steel slag, the …
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The steel slag (SS) selected in this work belongs to the basic oxygen furnace SS, which was produced and aged for 6 months at Wuyang Iron and Steel Co., Ltd. in Henan Province, China. Its appearance is shown in Fig. 1. SS had a grayish-brown appearance with large surface roughness, porosity, and obvious angularity.
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Characteristics of steel slag With the increase of basicity, the color of the cooled steel slag changes from gray and brown gray to gray and white. The bulk density of steel slag is about …
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Steel slag, copper slag, lead-zinc slag, and electric furnace ferronickel slag are the most common metallurgical slags. ... Xue M., Li H. Preparation of Cement-Based Color Facing Mortar by Copper Pyrometallurgical Slag Modification: Efficient Utilization of High-Iron-Content Slag. J. Environ. Chem. Eng. 2021; 9:105888. doi: 10.1016/j.jece.2021. ...
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Toxic leaching of steel slag and permeable steel-slag–bitumen mixture: Samples of steel slag and PSSBM were ground, 10 g was weighed and put into a polyethylene bottle, then 200 mL of toxicity characteristic leaching procedure (TCLP) extractant (pH = 2.88 acetic acid solution) was added, and then turned over and oscillated for 18 h at room ...
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M040 aggregate (a); M040 CDM aggregate (b); FM040 steel slag and CDM (c); oven slug (d).2.2. Steel Slag in Asphalt Layer. Concerning the asphalt layer, starting from a mixture of bituminous conglomerate defined as "M0" as a reference, the aim of this phase was optimizing the quantity of slag in an asphalt mixture and, subsequently, to identify for this mixture the optimum …
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The thermodynamic and kinetic properties of the carbothermic reduction of MnO in the five-component slag, MnO-SiO2-CaO-MgO-Al2O3, is critical in the production process of Mn-ferroalloys. While the reduction rate is mainly dependent on the presence of a solid MnO phase in the slag for Mn-Fe-alloys, the rate for the Mn-Si-Fe alloys has two distinct steps, a slow step …
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Organophosphates are a type of emerging environmental contaminant, which can be removed effectively by adsorption. Here, modified steel slag was examined for its adsorptive performance in the removal of hydroxyethylidene diphosphonic acid (HEDP) from water. Compared to acid (55.3%, maximum removal rate) and base (85.5%) modification, high …
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Steel slag and its mixtures with fly ash show the potential to be used in pavement layers when stabilized with either cement or lime (Pasetto and Baldo, 2018; Liu et ... EAFS tested in this study is in dark grey to black color (see Fig. 1 a). The fresh BOFS was received in air-tight sacks from an integrated steel mill located in Northern ...
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This slag is referred to as EAF(L) slag, as it is the ladle slag generated from the refining of the steel from the electric-arc furnace. Edward C. Levy Co. provided representative samples of EAF(L) slag consisting of …
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Steel slag is an aggregate composed of various minerals and glassy substances. Due to different chemical components and cooling conditions, the appearance and color of steel slag vary greatly. The steel slag with lower …
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Blue slag, a by-product of metal ore smelting processes, is a beautiful and often beautifully colored glass that can range from glassy to dull and stony in appearance. It …
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In the same way as air-cooled blast furnace slag, converter slag is cooled slowly by natural cooling and water spray in a cooling yard. It is then processed and used for various iron and steel slag (converter) applications. Approximately 110 kg of slag is generated for each ton of converter steel. Electric arc furnace slag
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Steel slag aggregate is typically spherical, like natural aggregate but has a rougher and more porous surface. In addition, steel slag generally has a darker color than natural aggregate because it contains more iron oxide. Fig. 8 shows the two aggregates' physical appearance. Scanning Electron Microscope (SEM) analysis was performed to ...
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steel slag and stainless steel slag, In order to gain a better understanding of their potential cementitious behavior. ... The color of the slags was visually evaluated. The Particle size distribution was obtained by Microtrac S3500 laser particle size analyzer. Specific gravity
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