In this paper, we present a simple and fast way to transform the MS in a nanocrystalline powder containing only the hematite (α-Fe2 O 3) phase. The MS was dry …
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This work studies the use of steel slag as a source of metallic oxides for the synthesis of chemically bonded phosphate ceramics (CBPCs). Analysis of different slags revealed characteristics, relating to alkaline character, granulometry and metallic oxide content, which could enable their use other than as construction aggregates.
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Hematite is an oxide of iron having the composition Fe2O3. Pure hematite, also called "red ore" contains 70% Fe. Manufacturing processes for steel are made in furnaces (open hearth, Bessemer...
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Ladle metallurgy (LM) slag is generated during the refining process step in stainless steel making. In view of its very fine particle size, due to the transformation of β- to γ-C 2 S, and the Cr content, the slag is challenging in terms of handling and disposal and is used in only few applications. The current work explores the utilisation of the LM's fine fraction in Ordinary …
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use of organic binder and Cu-smelting slag. 4–5% of Linz-Donawitz (LD) sludge was used by Pal et al. ( 2022 ) in organic bonded hematite pellets to enhance internal
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The total extent of iron and steel slag identified in Fig. 1 and Table 4 suggested that approximately 38% of iron and steelmaking slag remains in landfill, based on previous estimates of total slag production between 1875 and 2008 in the UK (Renforth et al., 2011). The regional extent of slag stockpiles is explained by a number of factors ...
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Steel rolling sludge, an oil-containing waste generated during steel production, was difficult to manage. Prolonged storage poses significant environmental and health hazards. Most steel enterprises in China use steel rolling sludge directly as a raw material for sintering. However, its adhesive nature caused poor mixing with other materials, affecting the quality of the sinter. …
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Slags are the residual by-products generated during steel manufacturing. Depending upon the processes from which they are generated or type of furnace used, steel slags are in general categorized into blast furnace iron slag (BF), basic oxygen furnace slag or Linz-Donawitz converter slag (BOF or LD), electric arc furnace slag (EAF) and refined slag or ladle furnace …
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The China Association of Metal Scrap Utilization first announced the production and utilization of steel slag in 2005 (2005); between 2005 and 2013, China's steel slag production rose sharply along with an increase in its crude steel production. The amount of steel slag reached 101.3 million tons in 2013.
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This paper describes the investigations carried out at JSW Steel Ltd to identify alternate sources of silica other than quartzite for use as flux in BF to maintain the desired slag …
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Keywords Steel slag ·Road construction materials ·Pavement performance 1 Introduction Steel slag is a solid waste derived from the steelmaking process, which accounts for approximately 15% of the total crude steel output [1, 2]. The annual global production of iron and steel slag exceeds 400 million tons.
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D Satish Kumar, associate vice president, research and development at JSW Steel, says that apart from recycling 0.27 million tonnes of steel slag a year, the project is expected to reduce 100 tonnes of CO2-equivalent of greenhouse gas emissions a year from the use of vehicles for slag disposal within the plant; and reduce the demand for river ...
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Steel slag is an industrial by-product generated during steel production. Slag is used as an alternate material, few types of slag ends in land filling material and poses environmental pollution [1]. Production of steel is increasing every year due to urbanization and industrialization and the by-product slag is also generated on a large scale.
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Contrarily, the production of gas during the reduction of iron oxides causes slag ing which can hardly be controlled. High temperature as well as low slag basicity reduce the stability. In smelting reduction a large slag volume is expected. A rinse-spot in the slag layer, which can prevent slag ing, disappears under these conditions.
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Based on test results, the use of hematite and iron slag has been found to enhance the shielding properties of concrete subjected to ¹³⁷Cs and ⁶⁰Co point sources. Moreover, …
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The present study aims in developing high density radiation shielding composite using induction furnace (IF) steel slag as an aggregate (coarse/fine) in concrete. IF steel slag is incorporated in concrete specimens (Mix a - 0% of slag, Mix b - 40% of slag as coarse aggregate, Mix c - 40% of slag as coarse aggregate and as fine aggregate) of size 150 × 150 × 50 …
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New methods of materials separation and metal production utilizing sulfide chemistries may support a paradigm shift in sustainable metallurgy. We leverage sulfidation with elemental sulfur, aluminothermic reduction, and slag refining to obtain a chromium–nickel–molybdenum ferroalloy and stainless steel using a sulfide-based route …
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The use of steel slag for CO 2 sequestration, heavy metal and hydrocarbon remediation as well as mine-revegetation are low -risk and provide minimal environmental consequences. 7. ... This will show the extent of steel slag production and provide economic incentives to increase the utilisation of steel slag. ...
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PDF Producing Portland cement from iron and steel slags and limestone. and 8% steel slag kept the compressive strength of concrete above standard values materials for Portland cement production before hematite and magnetite
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Herein, we review approaches to the re-use of steel making slag, with particular focus on those that lower the environmental impact of industry, in the hope to promote further …
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Steel slag is a waste product of steel production, which is primarily carried out using electric arc furnaces (EAF), basic oxygen furnaces (BOF) or ladle furnaces (LFS). Black steel slag (electric arc furnace slag) is derived from primary metallurgy or scrap melting in electric arc furnaces [17]. White steel slag (ladle furnace basic slag ...
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Steel slag, a typical industrial by-product in the steel-making process, pollutes the environment and causes ecological deterioration. In this study, steel slag was recycled in chip seals as the aggregate, and the functional and environmental performance of the chip seal with recycled steel slag was determined.
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Based on test results, the use of hematite and iron slag has been found to enhance the shielding properties of concrete subjected to 137Cs and 60Co point sources. Moreover, incorporating 30%...
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This study explored the influence of using copper slag as an alternative sand for producing cement mortar bricks and its effect on γ-ray attenuation property, strength, and consistency of mortar. The linear attenuation coefficients and mass attenuation coefficients were experimentally determined for mortar mixtures using the 60 Co and 137 Cs gamma-ray …
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The thermal treatment of steel slag up to 900 °C indicated that this solid is almost stable and few contained phases change their structures. Keywords: EAF slag, characteristics, Möss spectroscopy, valuable metals, recovery. 1. Introduction. Steel slag is an industrial by-product that is generated during steelmaking operations [1,2,3,4 ...
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Hematite, ed or expanded blast furnace slag, and sintered pulverized fuel ash (fly ash) are examples of industrial by-products. ... This optimal ratio of steel slag was used to cast hexagonal pavement samples with a side length of 125 mm and a height of 80 mm. They were tested for compressive strength, split strength, bending strength, and ...
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ried out at JSW Steel Ltd to identify alternate sources of silica other than quartzite for use as flux in BF to maintain the desired slag chemistry for smooth operation and cost reduction. Banded hematite quartzite (BHQ) ore available in Karnataka region contains 28–33% Fe, 45–46% silica, 1.3–1.5% alumina and is found suitable for use as ...
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The significant increase in GAF recorded for IF steel slag replaced concrete specimen is due to the presence of iron compounds (Fig. 3) such as iron silicate (Fe 7 SiO 10), hematite (ε-Fe 2 O 3) and iron aluminium silicate (Fe 3 Al 2 Si 3 O 12). 50% of IF steel slag replaced concrete blocks give higher GAF than the other concrete specimens ...
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Treatment of Molten Steel Slag for Cement Application ... besides hematite and magnetite is rich in calcium ferrite, monticellite, diopside and magnesium oxide in the form of a periclase. ... Use of Slags in the Production of Portland Cement Clinker. In: Glagolev, S. (eds) 14th International Congress for Applied Mineralogy (ICAM2019). ICAM 2019
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Steel slag production is estimated as 10–15% of crude steel production [17]. According to World Steel Association (Worldsteel) data, 15.7 million tons of steel slag emerge as a by-product in Europe alone, of which 11.5 million tons are recycled [18]. When it comes to the biggest steel manufacturer in the world, China, the reuse of steel slag ...
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The use of steel slag in concrete and mortar with coarse/fine aggregate/cementitious material can conserve natural resources (Baalamurugan et al., 2023). Additionally, steel slag is being explored ...
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The main plants in steel slag production are İskenderun iron and steel plant with 1.131.695 tons, Osmaniye iron and steel plant with 619.819 tons and Kocaeli iron and steel plant with 874.327 tons. Approximately 40% of these steel slag wastes have been recycled and rest of the amount has been disposed of [20]. Recycled waste rates in the ...
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Utilizing treated steel slag as coarse/fine aggregate in concrete production is a high-value solution that can alleviate the worry about resource depletion and solve the negative impact of steel …
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Hematite production in India ... as old as the history o f iron and steel production. The . ... called "slag" and a mixture of CO, CO 2 and NO 2 that .
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