Utilization of ferrochrome wastes such as ferrochrome ash and ferrochrome slag in concrete manufacturing

Acharya, Prasanna Kumar; Patro, Sanjaya Kumar

doi:10.1177/0734242x16654751

Cited by 76 publications

(16 citation statements)

References 3 publications

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“…The main by-products of the steel industry, blast furnace (BF) slag and steel-making (SM) slag, can partially replace cement in concrete because of its potential hydraulicity [1,2,4,5,6,7,8,9]. According to previous studies, about 70% of the total production of BF slag has been used as a replacement for Portland cement due to its numerous advantages, e.g., an increase in long-term strength and durability, decreased heat of hydration and the occurrence of the alkali-aggregate reaction.…”

Section: Introductionmentioning

confidence: 99%

Comparing Properties of Concrete Containing Electric Arc Furnace Slag and Granulated Blast Furnace Slag

et al. 2019

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For sustainable development in the construction industry, blast furnace slag has been used as a substitute for cement in concrete. In contrast, steel-making slag, the second largest by-product in the steel industry, is mostly used as a filler material in embankment construction. This is because steel-making slag has relatively low hydraulicity and a problem with volumetric expansion. However, as the quenching process of slag has improved recently and the steel making process is specifically separated, the properties of steel-making slag has also improved. In this context, there is a need to find a method for recycling steel-making slag as a more highly valued material, such as its potential 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. The initial and final setting, shrinkage, compressive and split-cylinder tensile strength of the slag concretes were measured. It was found that replacing cement with EAF oxidizing slag delayed the hydration reaction at early ages, with no significant problems in setting time, shrinkage or strength development found.

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Section: Introductionmentioning

confidence: 99%

Comparing Properties of Concrete Containing Electric Arc Furnace Slag and Granulated Blast Furnace Slag

et al. 2019

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“…FCA is manufactured in large quantities and discharged without any pollution control, or remediation mechanisms in place [37][38][39][40]. It not only uses up hectares of precious land but also poses a threat to underground and surface water resources [41]. FCA meets the slag specifications and can be utilized as a cementitious material in combination with lime to replace cement [42,43].…”

Section: Research Significancementioning

confidence: 99%

Comprehensive Characterization of Ferrochrome Slag and Ferrochrome Ash as Sustainable Materials in Construction

Kumar¹,

Keshav

Sivanantham³

et al. 2022

Journal of Nanomaterials

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Ferrochrome slag (FCS) and ferrochrome ash (FCA) are by-products generated during the production of ferrochrome alloy in the ferrochrome industry. The use of these by-products as construction materials appears to be an innovative strategy that could provide numerous environmental and socio-economic benefits. However, the residual chromium present in ferrochrome by-products may have some negative effects on the surrounding environment also. In a nutshell, this study provides a thorough and critical examination of ferrochrome slag and ferrochrome ash’s suitability for construction, as well as a list of the major shortcomings that must be addressed to accomplish construction sustainability. A detailed summary of the physical, chemical, and mechanical characteristics of ferrochrome slag and ferrochrome ash was presented in the study. Ferrochrome slag from previous studies is said to exhibit better mechanical properties compared to conventional coarse aggregates which contributed to better mechanical properties of concrete. The application of ferrochrome slag as a substitute for natural sand, on the other hand, is considered to have a detrimental impact. As a reason, further research is necessary to determine the impact of replacing conventional fine aggregate with ferrochrome slag on the various mechanical and durability properties of concrete. Ferrochrome ash from previous studies can be used as a partial replacement for cement and unlike FCS, FCA is nonhazardous since no residual chromium traces were present in FCA. Furthermore, the protracted safety and effect on the surrounding environment of ferrochrome slag containing concrete in a variety of exposure conditions have to be fully examined in the near future.

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“…The resulting alloy contained (wt.,%): Cr -70.98; Fe-20.27; C -8.09; Si -0.61; S -0.03; P -0.02. A research related to studying the possibility of using ferrochrome dust for production of concrete (partial replacement for conventional Portland cement) show that the addition of up to 40% of the dust and 7% of lime does not affect the properties of concrete (does not worsen or improve it) [14,15]. Due to its high fire resistance, the ferrochrome production dust can be used for manufacture of refractory materials [16], such as refractory bricks [17].…”

Section: Introductionmentioning

confidence: 99%

Theory and Technology of Manufacturing a Ferroalloy From Carbon Ferrochrome Dusts

Shevko

Afimin

Karatayeva

et al. 2021

Acta Metall Slovaca

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The article contains the research results of obtaining a ferroalloy from a carbon ferrochrome dust containing 30,2% of Сr2O3, 23.4% of SiO2, 32.7% of MgO, 5.0% of FeO, 1.6% of CaO, 4.5%of Al2O3, 2.3%of C, and 0.3 %-others. The studies were carried out by a thermodynamic modeling method using the HSC-5.1 software package (Outokumpy) based on the principle of the Gibbs energy minimum, the Box-Hunter rototable planning technique and electric melting of the dust in an arc furnace. It was found that the interaction of the dust with carbon under equilibrium conditions and in the presence of iron leads to formation of Cr4C(T>10000C),Cr3C2, Cr7C3,Cr (T>11000C), FeSi (T>13000C), SiC (T>14000C), SiOg and Si(T>15000C). In the temperature range of 1745-19000C and in the presence of 18-34% of carbon and 8% of iron of the dust mass, the resulting ferroalloy contained 18.5-25.2% of Si and 46.8-49.4% of Cr (in this case the silicon extraction degree into the alloy was 60.0-64.4%, the chromium one–99.8%). When the electrosmelting the granulated dust together with coke and steel shavings, the chromium extraction degree into the alloy was 98-99%, the silicon one–53-57%; the obtained ferroalloys containing 18.3-21.9% of silicon and 45.6-53.6%of chromium meet the requirements to FeCrSi23-grade ferrosilicochromium.

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Utilization of ferrochrome wastes such as ferrochrome ash and ferrochrome slag in concrete manufacturing

Cited by 76 publications

References 3 publications

Comparing Properties of Concrete Containing Electric Arc Furnace Slag and Granulated Blast Furnace Slag

Comparing Properties of Concrete Containing Electric Arc Furnace Slag and Granulated Blast Furnace Slag

Comprehensive Characterization of Ferrochrome Slag and Ferrochrome Ash as Sustainable Materials in Construction

Theory and Technology of Manufacturing a Ferroalloy From Carbon Ferrochrome Dusts

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