Processing of Titanium-Magnesium Production Waste

Karshigina, Z. B.; Ultarakova, Almagul; Lokhova, Nina; Yessengaziyev, Azamat; Kassymzhanov, Kaisar

doi:10.12911/22998993/150004

Cited by 3 publications

(6 citation statements)

References 8 publications

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“…Silicon fluorides were separated in the form of sublimates at the first stage of processing of fine dust obtained from the electric smelting of ilmenite concentrates; a sample of dust was mixed with ammonium bifluoride in a 1:1 ratio. The process was performed at 260 °C for 6 h [ 35 , 36 , 37 ].…”

Section: Resultsmentioning

confidence: 99%

“…Dust contains titanium-containing phases: iron titanium oxides (Fe 2 TiO 5 and Fe 1.5 Ti 0.5 O 3 ), magnesium titanium oxide (MgTi 2 O 5 ), and titanium oxide (TiO 2 ) [ 35 ]. The desiliconized residues are mostly represented by such titanium-containing phases as (NH 4 ) 2 TiF 6 , Ti 6 O 11 ; there is also a (NH 4 ) 0.8 TiOF 2.8 phase [ 37 ]. Taking into account the results of XRD analysis of dusts and desiliconized residues of their fluorination, the process of titanium fluoride formation can be represented for the main phases of iron titanium oxides (Fe 2 TiO 5 and Fe 1.5 Ti 0.5 O 3 ), and magnesium titanium oxide (MgTi 2 O 5 ), in dusts, by the following reactions:

…”

Section: Resultsmentioning

confidence: 99%

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Studies on the Processing of Fine Dusts from the Electric Smelting of Ilmenite Concentrates to Obtain Titanium Dioxide

Ultarakova¹,

Karshigina²,

Lokhova³

et al. 2022

Materials

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This article presents studies on the ammonium fluoride processing of dusts from the reduction smelting of ilmenite concentrate with separation of silicon to obtain titanium dioxide. Optimal conditions for pyrohydrolysis of titanium fluorides were determined. The effects of temperature and duration on the process were studied. The optimal conditions for pyrohydrolysis of titanium fluorides were a temperature of 600 °C and duration of 240–300 min. The degree of titanium fluoride conversion to titanium oxide was 99.5% at these conditions. Titanium dioxide obtained by pyrohydrolysis of titanium fluorides was purified from iron, chromium, and manganese impurities. The effect of hydrochloric acid solution concentration, S:L ratio, and the process duration on the purification degree of titanium fluoride pyrohydrolysis was studied. The following optimum purification conditions were determined: hydrochloric acid solution concentration 12.5–15 wt%, temperature 25–30 °C, S:L = 1:6÷8, duration 20–30 min. The purified titanium dioxide consisted mainly of anatase. The pigmented titanium dioxide of rutile modification with 99.8 wt% TiO2 was obtained after calcination at 900 °C for 120 min.

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Section: Resultsmentioning

confidence: 99%

…”

Section: Resultsmentioning

confidence: 99%

Studies on the Processing of Fine Dusts from the Electric Smelting of Ilmenite Concentrates to Obtain Titanium Dioxide

Ultarakova¹,

Karshigina²,

Lokhova³

et al. 2022

Materials

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“…XRD analysis showed that formed ammonium hexafluoride does not sublimate completely in 2-4 h. The reaction of ilmenite fluorination is not completed (Figure 5). An increase in the fluorination duration up to 6 h allowed almost complete extraction of silicon in the sublimations (Figure 6) [32]. An increase in the fluorination duration up to 6 h allowed almost complete extraction of silicon in the sublimations (Figure 6) [32].…”

Section: Effect Of the Fluoridation Durationmentioning

confidence: 96%

“…An increase in the fluorination duration up to 6 h allowed almost complete extraction of silicon in the sublimations (Figure 6) [32]. An increase in the fluorination duration up to 6 h allowed almost complete extraction of silicon in the sublimations (Figure 6) [32]. The study of the influence of specific ammonium bifluoride consumption on fluorination of electrical melting components of ilmenite concentrate dust with formation and sublimation of silicon fluoride was performed at a temperature of 260 °С with a 6 h…”

Section: Effect Of the Fluoridation Durationmentioning

confidence: 99%

Technology for Complex Processing of Electric Smelting Dusts of Ilmenite Concentrates to Produce Titanium Dioxide and Amorphous Silica

Karshigina

Ultarakova

Lokhova

et al. 2022

Metals

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This paper presents the results of research on the development of a technology intended to process electric smelting dusts of ilmenite concentrate with the extraction of silicon and titanium and the production of products in the form of their dioxides. Dusts were processed for silicon separation using the ammonium fluoride method. The optimum conditions for the fluorination and sublimation process of silicon compounds from the electric smelting dust of the ilmenite concentrate were determined: a temperature of 260 °С, a 6 h duration, and mass ratio of dust to ammonium bifluoride of 1:0.5 ÷ 0.9. The sublimation degree of silicon compounds was ~84–91%. The sublimation of titanium fluorides from the remaining sinter was carried out at a temperature of 600 ± 10 °C for 2 h, the mass ratio titanium-containing residue: ammonium bifluoride of 1:0.5, and the degree of sublimation of titanium fluorides was 99%. Iron, manganese, and chromium impurities in the sublimation of titanium fluorides sublimate to a rather low degree. Pyrohydrolysis of titanium fluoride sublimes at 600 °C and allows for the conversion of fluorides into titanium dioxide by 99.5% in 4–5 h. Titanium dioxide of rutile modification with 99.8% TiO2 was obtained after hydrochloric acid purification and calcination. A technological scheme for the complex processing of dust from the electric smelting of ilmenite concentrates with the production of silica and titanium dioxide is proposed.

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“…Scandium extraction is carried out with a 70% solution of tributyl phosphate in kerosene; the resulting scandium-enriched organic phase is washed from impurities with strong hydrochloric acid (220-240 g/l HCl); then the scandium extract is transferred to the aqueous phase (reextract) with a 7% hydrochloric acid solution. From the reextraction of oxalic acid, oxalates of scandium and other metals are precipitated, the resulting pulp is filtered, a solid precipitate of oxalates is dried and heated at 700ºc and a technical oxide containing 40-60% Sc2O3 is obtained [ [24], [25]].…”

Section: Sc2o3+6cl2+3c=4sccl3+3co2mentioning

confidence: 99%

Overview of Technologies Used to Extract Scandium from Secondary Raw Materials

Baigenzhenov,

Orynbayev,

Turan

2024

KIMS/CUMR/MShKP

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The exceptional mechanical and chemical properties exhibited by scandium, characterized by its low density, high strength, and remarkable resistance to corrosion, have positioned it as a sought-after metal in diverse industrial applications. Consequently, a surge in market demand for scandium has been observed, highlighting its unique attributes compared to other metals. The Republic of Kazakhstan has identified potential sources of scandium in the waste generated by the titanium, uranium, and aluminum industries. By implementing efficient processing techniques for these production wastes, the country can effectively address the deficit of scandium while also mitigating man-made emissions, thus significantly improving the environmental landscape. This article aims to explore and evaluate contemporary methodologies that have been employed for the recovery of scandium from the aforementioned secondary sources. By examining and analyzing these techniques, we can gain insights into the most effective and sustainable approaches to harnessing scandium from waste materials in Kazakhstan. This research not only contributes to meeting market demands but also ensures the responsible utilization of scandium, benefiting not just the country's economy but also its environmental sustainability.

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Processing of Titanium-Magnesium Production Waste

Cited by 3 publications

References 8 publications

Studies on the Processing of Fine Dusts from the Electric Smelting of Ilmenite Concentrates to Obtain Titanium Dioxide

Studies on the Processing of Fine Dusts from the Electric Smelting of Ilmenite Concentrates to Obtain Titanium Dioxide

Technology for Complex Processing of Electric Smelting Dusts of Ilmenite Concentrates to Produce Titanium Dioxide and Amorphous Silica

Overview of Technologies Used to Extract Scandium from Secondary Raw Materials

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