Research for the recovery of Zn and Pb from electric arc furnace dust through vacuum carbothermal reduction

Yang, Jing; Huang, Run; He, Xuan; Lv, Xiaodong; Zhu, Renlin; Jin, Huixin; Xue, Ding

doi:10.1016/j.psep.2022.12.016

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…For a detailed analysis and application of the stability/solubility diagram, it is of particular importance to know the chemical forms and species in which the water-soluble components, which, in our work, are the EAF dust components, are found. The leaching efficiency, i.e., dissolution in water, of monitored elements depends on the form in which they can be found in EAF dust [8,23,24,28,40,41]. For example, lead, iron, zinc, and copper in sulfide and sulfate forms are insoluble or slightly soluble in water, sodium and potassium in chloride forms are soluble in water, but chlorine in the form of a compound with zinc (Zn 5 (OH) 8 Cl 2 •H 2 O) is not soluble in water.…”

Section: Influence Of Temperature On the Leaching Efficiency Of The E...mentioning

confidence: 99%

“…The presence of higher zinc content in EAF dust is a consequence of its widespread use to protect steel from corrosion or as a component of scrap brass [3,38,39]. Zinc in EAF dust is present in oxide phases such as ZnFe 2 O 4 and ZnO, iron as Fe 3 O 4 and Fe 2 O 3 , calcium as CaO and CaCO 3 , lead, copper, chromium, and nickel can appear in the form of oxides, chlorides, sulfides or sulfates, and chlorine in the form of alkali metal chlorides, while fluorine occurs in the form of lead and zinc fluorides [8,23,24,28,40,41].…”

Section: Introductionmentioning

confidence: 99%

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Application of a Simple Pretreatment in the Process of Acid Leaching of Electric Arc Furnace Dust

Trifunović,

Milić,

Avramović

et al. 2024

Metals

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Experimental investigations of the effectiveness of the pretreatment of the acid leaching process of a representative sample of electric arc furnace dust (EAF dust) and characterization of a representative sample were performed. As EAF dust is globally defined as hazardous solid industrial waste, and it contains a high percentage of zinc and other useful components, in this paper, the application of pretreatment will be carried out in order to increase the efficiency of the further process of acid leaching, all with the aim of using EAF dust as a secondary raw material for metal valorization. The pretreatment involved the application of a simple process of leaching the EAF dust sample with distilled water. Under the following defined optimal leaching conditions: time—30 min, ratio of solid to liquid phase—1:10, temperature—ambient, and stirring speed—500 rpm, a reduction in the content of water-soluble components was achieved, namely, 83% Cl, 92% K, 74% Na, 14% Cd, 15% Ca, and 19% F. The application of the pretreatment enables significantly better filtration of the suspension and increases the leaching efficiency of zinc and other useful components in the further process of leaching EAF dust with a sulfuric acid solution, compared with the process of direct acid leaching of EAF dust.

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Section: Influence Of Temperature On the Leaching Efficiency Of The E...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of a Simple Pretreatment in the Process of Acid Leaching of Electric Arc Furnace Dust

Trifunović,

Milić,

Avramović

et al. 2024

Metals

View full text Add to dashboard Cite

show abstract

“…For over a century, carbothermal reduction has long been recognized and used as a low-cost and mass-production chemical route for thermal decomposition and recovering valuable metals such as Ga, 17 Zn and Pb. 18,19 Moreover, in recent years, the CTR process has opened up a scalable way for synthesizing a large variety of low-dimensional metal oxide nanomaterials, such as ZnO and SnO2, for catalytic and electronic applications. [20][21][22] In general, the reduction of binary metal oxide in the presence of CO as a reducing agent can be demonstrated by the following reactions:…”

Section: Introductionmentioning

confidence: 99%

Carbothermal reduction reaction as a strategy for boosting thermoelectric performance of binary metal oxides: a case study of ZnO ceramics

Farahi

Yousefizad

2023

Preprint

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As a powerful concept, grain boundary (GB) engineering has been increasingly applied to enhance the energy conversion efficiency in thermoelectric materials through directly controlling the electrical and thermal transport characteristics. However, most efforts thus far have been focused solely on introducing extrinsic defects or impurity phases into the system without considering the role of intrinsic defects as critical factors. Thus, herein, we provide a holistic discussion on the correlation between the intrinsic defects and thermoelectric properties of materials using the carbothermal reduction (CTR) process. Taking ZnO as an example material, we experimentally show that vacancy-assisted migration of Zn interstitials lead to a decrease in the Schottky barrier height at grain boundaries. In addition, increasing the carrier concentration and band gap narrowing caused by the CTR reaction can lead to power factors up to 246 μW/mK2, which is comparable to the excellent values of transition metal-doped ZnO compounds. By minimizing the specific contact resistance of the interfaces down to 12.7 mΩ cm2 at a clamping pressure of 20 MPa, the output power of a single-leg module reaches an outstanding value of 292 μW at ΔT = 65 K, which is extremely higher than those of the state-of-the-art ZnO based materials, almost by a factor of three. We believe that the current study manifests a cost-effective avenue toward the development of efficient and practical thermoelectric devices.

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Study on the Volatilization Condensation Law of Pure Metallic Zinc and Lead During Vacuum Distillation

Yang,

Lei,

Huang

et al. 2023

Metall Mater Trans B

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Research for the recovery of Zn and Pb from electric arc furnace dust through vacuum carbothermal reduction

Cited by 6 publications

References 11 publications

Application of a Simple Pretreatment in the Process of Acid Leaching of Electric Arc Furnace Dust

Application of a Simple Pretreatment in the Process of Acid Leaching of Electric Arc Furnace Dust

Carbothermal reduction reaction as a strategy for boosting thermoelectric performance of binary metal oxides: a case study of ZnO ceramics

Study on the Volatilization Condensation Law of Pure Metallic Zinc and Lead During Vacuum Distillation

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