A comprehensive review on recycling methods for cemented tungsten carbide scraps highlighting the electrochemical techniques

Katiyar, Prvan Kumar; Randhawa, N S

doi:10.1016/j.ijrmhm.2020.105251

Cited by 48 publications

(31 citation statements)

References 44 publications

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“…The process by which In 3+ is reduced at the Ti electrode surface to form indium nuclei can be derived from the current timing curves at different potentials ( Chung and Lee, 2013 ). The nucleation mechanism of In 3+ can be obtained from this process by fitting the equations for instantaneous nucleation and continuous nucleation ( Katiyar and Randhawa, 2020 ; Xu et al, 2021 ) to four different points taken arbitrarily from the ascending parts of the different timing current curves in Figure 5 , respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Indium is a bright and silvery-white rare metal with low melting point, high flexibility, high boiling point, and a face-centered tetragonal crystal structure. At room temperature, indium is not oxidized by air and its chemical properties are relatively stable ( Katiyar and Randhawa, 2020 ). With the increasing demand for indium in the high-tech field, the purity of indium has become more demanding.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Mechanism of the Preparation of High-Purity Indium by Electrodeposition

Hou

Wang

et al. 2022

Front. Chem.

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Indium is a crucial material and is widely used in high-tech industries, and electrodeposition is an efficient method to recover rare metal resources. In this work, the electrochemical behavior of In3+ was investigated by using different electrochemical methods in electrolytes containing sodium and indium sulfate. Cyclic voltammetry (CV), chronoamperometry (CA), and alternating current impedance (EIS) techniques were used to investigate the reduction reaction of In3+ and the electrocrystallization mechanism of indium in the indium sulfate system. The cyclic voltammetry results showed that the electrodeposition process is irreversible. The average charge transfer coefficient a of In3+ was calculated to be 0.116 from the relationship between the cathodic peak potential and the half-peak potential, and the H+ discharge occurred at a higher negative potential of In3+. The nucleation mechanism of indium electrodeposition was analyzed by chronoamperometry. The mechanism of indium at potential steps of −0.3 to −0.6 V was close to diffusion-controlled instantaneous nucleation with a diffusion coefficient of 7.31 × 10−9 cm2 s−1. The EIS results demonstrated that the reduction process of In3+ is subject to a diffusion-controlled step when pH = 2.5 and the applied potential was −0.5 V. SEM and XRD techniques indicated that the cathodic products deposited on the titanium electrode have excellent cleanliness and purity.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrochemical Mechanism of the Preparation of High-Purity Indium by Electrodeposition

Hou

Wang

et al. 2022

Front. Chem.

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“…It should be noted that the focus of this work is related to the CE strategies applied to mineral processes, so it does not consider, for example, the extensive information available on recycling of end-of-life products, e.g., electronic scrap (Kaya 2016, Zhang and Xu 2016, Abdelbasir et al 2018, Katiyar and Randhawa 2020, Mansur et al 2021). However, as was indicated in the introduction, the implementation of CE, including metal recycling, will reduce the global material extraction by about 10%, including a decrease of about 27% in metal extractions (Wiebe et al 2019).…”

Section: Recycle Materials (R7)mentioning

confidence: 99%

Toward the Implementation of Circular Economy Strategies: An Overview of the Current Situation in Mineral Processing

Cisternas

Ordóñez

Jeldres

et al. 2021

Mineral Processing and Extractive Metallurgy Review

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Mining resources have played a leading role in the development of humanity, and the demand for these raw materials is expected to increase in the foreseeable future. In addition, new technologies also require the extraction of new critical materials. These trends pose various challenges as there is a limited supply of natural resources, and standard mining and mineral processing practices are associated with significant environmental impacts, such as waste generation, energy and water consumption, and CO 2 emissions. The circular economy (CE) has recently gained attention as a model to address such a complex scenario. This work analyzes the current efforts towards the application of CE in mineral processing. Although advances have been made, this review shows that the most significant material flows and environmental impacts occur near the production sites, which currently limits the closure of loops. Besides, mining industries are conservative regarding the adoption of new technologies or processing strategies, which is another hindrance to the implementation of the CE. Thus, and with few exceptions, while some sectors are already facing advanced stages of CE (namely, CE 3.0), the mineral processing field struggles to advance from the basic CE requirements (i.e, CE 1.0 to CE 2.0).

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“…As a cermet its corrosion resistance is poor due the presence of the cobalt binder. Thus, Co was tried to be replaced by other binders like Ni or Cr; other solution like binderless carbides are still researched [7,8].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Resistance of Tungsten-Carbide-Rich Coating Layers Produced by Noble Gas Ion Mixing

Racz

Kerner

Menyhárd³

2022

SSRN Journal

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A comprehensive review on recycling methods for cemented tungsten carbide scraps highlighting the electrochemical techniques

Cited by 48 publications

References 44 publications

Electrochemical Mechanism of the Preparation of High-Purity Indium by Electrodeposition

Electrochemical Mechanism of the Preparation of High-Purity Indium by Electrodeposition

Toward the Implementation of Circular Economy Strategies: An Overview of the Current Situation in Mineral Processing

Corrosion Resistance of Tungsten-Carbide-Rich Coating Layers Produced by Noble Gas Ion Mixing

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