Low-temperature method for desiliconization of polymetallic slags by ammonium bifluoride solution

Смороков, А. А.; Kantaev, A. S.; Bryankin, Daniil; Miklashevich, Anna; Kamarou, Maksim; Romanovski, Valentin

doi:10.1007/s11356-022-24230-y

Cited by 14 publications

(6 citation statements)

References 39 publications

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“…Waste recycling is one of the main components of sustainable development, green chemistry (Stahel, 2016;Nelles et al, 2016), and the circular economy (Pires and Martinho, 2019;van Ewijkand Stegemann, 2020). Known examples of the involvement of waste in the production complex are the production of pigments (Zalyhina et al, 2021a;b), materials for water and wastewater treatment (Romanovski et al, 2021a;Romanovskii and Martsul', 2009;Bakhsh et al, 2022), building materials such as gypsum (Kamarou et al, 2020;, binders (Kamarou et al, 2021b;2021c;Romanovski et al, 2021b), building blocks (Akinwande et al, 2022a;2022b;Ademati et al, 2022), composite materials (Akinwande et al, 2022c;Ogunsanya et al, 2022), as well as the modi cation of known methods through the use of waste, which can reduce energy costs for production (Smorokov et al, 2022;2023a;2023b). Materials obtained on the basis of gypsum binders are promising materials due to their operational properties, as well as low energy costs for their production.…”

Section: Introductionmentioning

confidence: 99%

High-strength gypsum binder with improved water-resistance coefficient derived from industrial wastes

Kamarou,

Moskovskikh,

Kuskov

et al. 2024

Waste Manag Res

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The article presents the possibility of increasing the water resistance of gypsum binders (GBs) obtained based on synthetic gypsum by introducing additives derived from industrial wastes. Regularities were obtained for the influence of the type and amount of additives on the water/gypsum ratio (W/G), strength indicators and water resistance of high-strength GB. The introduction of a single-component additive to improve water resistance does not have a significant effect. Complex additives based on Portland cement, granulated blast-furnace slag, electric steel-smelting slag, expanded clay dust and granite screenings of various fractions have been developed that make the maximum contribution to improving the water resistance of a high-strength GB based on synthetic calcium sulphate dihydrate, which made it possible to increase the water-resistance coefficient from 0.39 to 0.82.

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Section: Introductionmentioning

confidence: 99%

High-strength gypsum binder with improved water-resistance coefficient derived from industrial wastes

Kamarou,

Moskovskikh,

Kuskov

et al. 2024

Waste Manag Res

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“…Iron tailings in China generally exhibit characteristics such as low grade, fine particle size, and susceptibility to mud formation. In the process of extracting valuable minerals or metals from iron ore, the residual material with a grade lower than the extraction grade is formed as iron tailings [11]. These tailings are then mixed with process water and chemical reagents to form a slurry, which is transported through pipelines to nearby tailings storage facilities [12].…”

Section: Introductionmentioning

confidence: 99%

Transforming Mining Waste to Wealth: A Novel Process for the Sustainable Recovery and Utilization of Iron Tailings through HCl Leaching and MOFs Absorption

Wu,

Deng,

Zhao

et al. 2024

Sustainability

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Rapid economic development and increased demand for mineral products in China have led to extensive extraction of various ores, resulting in significant environmental challenges associated with the generation of industrial solid waste, particularly iron tailings. Despite being a major mining nation, China faces issues of wasteful practices, with substantial amounts of valuable elements lost during the processing of iron ore. This study addresses the urgent need for sustainable solutions by proposing an innovative approach for the recovery of valuable elements from iron tailings. The proposed process involves a sequential application of acid leaching, chemical precipitation, and Metal-Organic Frameworks (MOFs) ion adsorption. The pre-treated iron tailings were leached in HCl solution with pH 1.5 at 70 °C for 2 h, and the co-leaching efficiency of 98.1% V, 98.2% Mo, 99.3% Fe, and 98.7% Mg was obtained. Chemical precipitation is then employed to isolate Fe, Mg V, and Mo and promote the formation of targeted compounds, ensuring concentration and purity. The integration of MOF ion adsorption, known for its high surface area and tunable pore structures, provides an efficient platform for selectively capturing and recovering target ions. 97.7% V and 96.3% Mo were selectively extracted from Zirconium 1,4-carboxybenzene metal-organic framework (UiO-66) adsorption system with pH 5.0 at 30 °C for 6 h, and 91.7% V and 90.3% Mo were selectively extracted from 2-methylimidazole zinc salt metal-organic framework (ZIF-8) adsorption system with pH 5 at 30 °C for 6.0 h. This three-stage process offers an efficient method for the recovery of valuable elements from iron tailings.

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“…Extraction of valuable elements by hydrometallurgy has received widespread attention due to its low cost [ 4 , 5 , 6 ]. Recently, the extraction of Ti from TBFS by the sulfuric acid roasting method has received wide attention because of its energy saving, low cost, and high Ti recovery rate [ 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Co-Removal of Fe/V Impurity in H2TiO3 Synthesized from Ti-Bearing Blast Furnace Slag

Yang,

Peng,

Wang

et al. 2023

Nanomaterials

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Ti-bearing blast furnace slag (TBFS) can be converted to impurity bearing TiOSO4 solution for TiO2 pigment production. However, the H2TiO3 (MTA) hydrolyzed from the solution has too high Fe/V impurity to meet the standard for TiO2 pigment. In this study, we found that Fe3+ and V3+ were easily hydrolyzed and entered the MTA lattice, and hence could not be removed by washing. Furthermore, Fe/V was hard to co-remove by the traditional reduction method. Therefore, the Fe/V non-hydrolysis condition (Ti3+ = 0.01 M, F = 3.0, T = 130 °C; Ti3+ = 0.01 M, F = 3.5, T = 150 °C) was determined by thermodynamic calculations. However, at these conditions, the Ti hydrolysis ratio was low or the reaction time was long. Therefore, a new two-step hydrothermal hydrolysis process was proposed. Step 1 (130 °C, 2 h) ensured the non-hydrolysis of V3+, and Ti was partially hydrolyzed to increase the H2SO4 concentration. Step 2 (150 °C, 2 h) ensured a high Ti hydrolysis ratio (>0.95) and short total reaction time (4–6 h). Finally, a high-purity MTA was obtained (Fe = 21 ppm, V = 145 ppm). These results provide new insights into the control of the hydrolysis of impurity ions in solutions and help to optimize the process of TiO2 pigment preparation from TBFS.

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Low-temperature method for desiliconization of polymetallic slags by ammonium bifluoride solution

Cited by 14 publications

References 39 publications

High-strength gypsum binder with improved water-resistance coefficient derived from industrial wastes

High-strength gypsum binder with improved water-resistance coefficient derived from industrial wastes

Transforming Mining Waste to Wealth: A Novel Process for the Sustainable Recovery and Utilization of Iron Tailings through HCl Leaching and MOFs Absorption

Co-Removal of Fe/V Impurity in H2TiO3 Synthesized from Ti-Bearing Blast Furnace Slag

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