Forming and Utilizing Ferrochromium Production Waste

Kascheev, I. D.; Жучков, В. И.; Zayakin, O. V.

doi:10.4028/www.scientific.net/msf.989.492

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…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]. In order to recycle the waste formed at the production of high-carbon ferrochrome at the Aktobe Ferroalloy Plant, it is proposed to apply the bag filter dust to produce refractory materials for furnace lining [18].…”

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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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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 industry producing ceramic building materials is marked by unlimited possibilities for using waste [16,17]. This is due to the large scale and material consumption of the construction complex as well as its range of products.…”

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Phase Composition and Physico-Mechanical Properties at Different Firing Temperatures of Ceramic Earthquake-Resistant Bricks with the Use of Ferro-Dust

2021

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Ceramic bricks based on low-melting clay and ferro-dust from self-disintegrating, low-carbon, ferrochrome slags, graded from M100 to M175, respectively, were obtained in the temperature range 950 -1100°C. The highest grades are in bricks fired at the temperatures 1050 and 1100°C, respectively, M150 and M175, which can be used as earthquake-resistant. Studies have shown that hematite, wollastonite, diopside and a liquid phase appear at brick firing temperature 950°C. Raising the firing temperature to 1000°C contributes to the appearance of anorthite and cristobalite. Raising the firing temperature to 1050°C does not bring about any special changes, except for an increase in the content of cristobalite and anorthite and a decrease in the content of feldspar. Subsequent raising of the firing temperature to 1100°C results in higher content of anorthite, diopside and cristobalite. The physicomechanical indicators increase due to the formation of anorthite and diopside in the samples.

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