Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 359, P. 130518 - 130518
Published: Nov. 13, 2024
Language: Английский
Metals, Journal Year: 2024, Volume and Issue: 14(4), P. 426 - 426
Published: April 4, 2024
Experimental investigations of the effectiveness pretreatment acid leaching process a representative sample electric arc furnace dust (EAF dust) and characterization were performed. As EAF is globally defined as hazardous solid industrial waste, it contains high percentage zinc other useful components, in this paper, application will be carried out order to increase efficiency further leaching, all with aim using secondary raw material for metal valorization. The involved simple distilled water. Under following optimal conditions: time—30 min, ratio liquid phase—1:10, temperature—ambient, stirring speed—500 rpm, reduction content water-soluble components was achieved, namely, 83% Cl, 92% K, 74% Na, 14% Cd, 15% Ca, 19% F. enables significantly better filtration suspension increases sulfuric solution, compared direct dust.
Language: Английский
Citations
1
Resources Conservation and Recycling, Journal Year: 2024, Volume and Issue: 215, P. 108085 - 108085
Published: Dec. 20, 2024
Language: Английский
Citations
1
iPolytech Journal, Journal Year: 2024, Volume and Issue: 28(1), P. 178 - 189
Published: March 30, 2024
The aim of the work was to study leaching kinetics zinc from compound CaO. ZnO, formed during sintering dust electric arc furnaces with limestone, as well identify mechanisms by means which such chemical interactions occur. object sinter limestone obtained at Chelyabinsk Zinc Plant. It found that is contained in form readily soluble ZnO. elemental composition initial dusts and determined spectral atomic emission method using inductively coupled plasma on a Spectroblue optical device spark spectrometry. phase materials studied Bruker D8 Advance X-ray diffractometer. milled apowder state having particle size ~0.04 mm yield ~97% composition, %: 11.9 Zn; 28.5 Ca; 16.6 Fe; 0.38 Mg; 0.14 Pb; 0.05 Cl. Experiments Zn NaOH solution were carried out following parameters: concentration pulp 0.202 g-ion/dm3 ; alkali – 5‒9 mol/dm3 NaOH; L:S = 9:1; mixing rate 10‒20 rad. c-1; temperature 333‒363 K; duration 0.5–2.5 hours. has been shown passes into sodium tetrahydroxozincate Na2[Zn(OH)4], while calcium remains cake, mainly insoluble Ca(OH)2, reacts carbon dioxide carbonate CaCO3. process dissolving corresponds external diffusion mode mutual transfer reagents reaction products through surface layer liquid interface “liquid–solid” phases an activation energy value equal 12.44 kJ/mol. Thus, parameters solution, proceeds mode. results are interest when identifying conditions corresponding intradiffusion kinetic modes leaching.
Language: Английский
Citations
0
Sustainability, Journal Year: 2024, Volume and Issue: 16(24), P. 11268 - 11268
Published: Dec. 23, 2024
Decarbonizing the iron and steelmaking industry is critical for China to pursue net-zero emissions target advance sustainable industrialization (SDG 9). This paper addresses urgent need decarbonization strategies in this sector, aiming align with China’s carbon neutrality goals by 2060. By reviewing current technological advancements potential pathways deep decarbonization, including process optimization, hydrogen-based direct reduction, capture, utilization, storage (CCUS), these technologies are categorized into six strategic approaches: systemic energy efficiency improvement, resource recycling, optimization innovation, breakthrough smelting, product iterative upgrading, CCUS. These also SDG 13 (climate action) reducing greenhouse gas 7 (affordable clean energy) through promotion of technologies. evaluated their emission reduction maturity. The results indicate that, while improvements recycling currently most mature widely implemented strategy, significant breakthroughs hydrogen metallurgy CCUS essential achieving long-term neutrality. Based on an analysis, a comprehensive roadmap proposed, detailing near-term actions required industry’s transition. focus (up 2030) should be enhancing whereas mid-term (2030–2050) emphasize adoption 2050–2060 period, achieve widespread commercialization smelting CCUS, ensuring achievement study intends provide systematic framework recommendations policymakers stakeholders guide addressing both economic challenges low-carbon development.
Language: Английский
Citations
0
ChemistrySelect, Journal Year: 2024, Volume and Issue: 9(23)
Published: June 18, 2024
Abstract ZnO films were obtained by electrodeposition technique from commercial Zn 2+ solutions and those spent alkaline batteries. The type of counterion pH impact directly on the structural, morphological, optical properties electrodeposited films. morphological crystallographic orientation differences observed X‐ray diffraction (XRD) analysis high‐resolution field emission scanning electron microscopy (HR‐FESEM), demonstrates influence origin precursors used in synthesis process. Those samples grown nitrate exhibit nanocolumns revealing a preferential growth (002) direction. On other hand, random (hexagonal plates, agglomerations, clusters, etc.) is through recycled solutions. All deposited achieved transparency close to 80 % an band gap around 3.30 eV. as‐deposited evaluated toward photodegradation capacity methylene blue (MB) for potential technological applications. Results that prepared ZnCl 2 presented more than degradation per mass ZnO. This work virtuous circle since are facile scalable discarded batteries MB photodegradation. Furthermore, simplicity recovery these substrates after application makes them attractive pragmatic option range water treatment Synopsis : Zinc depleted reused obtain thin remove contaminating dyes water.
Language: Английский
Citations
0
Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 359, P. 130518 - 130518
Published: Nov. 13, 2024
Language: Английский
Citations
0