A feasible strategy for deep arsenic removal and efficient tungsten recovery from hazardous tungsten residue waste with the concept of weathering process strengthening

Wu, Xinsheng; Qin, Jining; Zhang, Guiqing; Wu, Shengxi; Zeng, Li; Li, Jia; Li, Qinggang; Cao, Zuoying; Wang, Mingyu; Guan, Wenjuan

doi:10.1016/j.seppur.2022.122558

Cited by 6 publications

(2 citation statements)

References 30 publications

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“…As the amount of tungsten residue is large, tungsten becomes a valuable component for recycling [27,59,60]. As of today, tungsten may be recycled from tungsten residue via the approaches of hydrometallurgical leaching, roasting, separation, or alloy treatment [30,44,[61][62][63][64][65][66] (Figure 4). Specifically, in the hydrometallurgical leaching approach, tungsten residue is treated with inorganic acids (e.g., HCl, H 2 SO 4 , or H 3 PO 4 ) so that the tungsten content may enter the solution from which tungsten will be recycled in later steps.…”

Section: Tungstenmentioning

confidence: 99%

Recent Advances in the Utilization of Tungsten Residue: A Mini Review of China

Deng,

Cheng,

et al. 2023

Metals

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As a metal of strategic value, tungsten plays an important part in civil and military applications. Currently, China is the biggest tungsten producer all over the world, and the metallic smelting technologies for tungsten are well established. However, the harmless recovery and treatment procedures for tungsten residue remain rather underdeveloped. The treatment of tungsten residue generally includes the recovery of valuable metals (e.g., scandium, tantalum, and niobium) and the solidification of toxic elements (e.g., arsenic, lead, and chromium), which may control the transfer of these elements and metals. If treated improperly, the resource of tungsten residue may be wasted, and potential environmental risks could arise. Therefore, the safe disposition of tungsten residue has become the limit factor and an urgent problem to be solved for the sustainable development of tungsten-related industries. In this regard, we reviewed the industrial background of tungsten and the composition and toxicity characteristics of tungsten residue. In addition, particular attention was paid to the harmless utilization processes and technologies for tungsten residue, which were then systematically compared in terms of the applicable situations as well as their advantages and shortcomings. Finally, the development trend for the harmless utilization of tungsten residue was discussed, and some proposals for further studies were provided.

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Section: Tungstenmentioning

confidence: 99%

Recent Advances in the Utilization of Tungsten Residue: A Mini Review of China

Deng,

Cheng,

et al. 2023

Metals

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“…Gold-bearing deposits are characterised by low gold recoveries since gold is often chemically bound or encapsulated in sulphide minerals or coexists with carbonaceous matter, restricting conventional cyanide leaching techniques [10,11]. Consequently, an arsenal of pretreatment methods, including roasting, pressure oxidation, and bio-oxidation, has been employed to liberate gold for subsequent cyanide solution leaching [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Alkaline Leaching for Arsenic Removal in Gold-Bearing Ore from Miraflores Mine, El Oro, Ecuador

Epinoza-Ramón,

Reyes-Rodríguez,

Peña Carpio

et al. 2023

Preprint

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In Ecuador, particularly in the El Oro province, gold mining has been historically hampered by arsenic contamination in the ores. This research addresses the persistent issue of arsenic in gold-bearing ores from Miraflores Mine in Cerro Azul, Atahualpa Canton, and the challenges it presents to mining operations. The study's purpose is to evaluate the effectiveness of an alkaline leaching process for arsenic removal. The ore underwent thorough characterisation, employing advanced techniques like fire assay and atomic absorption. Once the ore's nature was discerned, an arsenic extraction experiment using a leaching solution was conducted. The implemented process achieved an arsenic removal efficiency of 90.54%. This enhanced ore quality facilitates efficient metallurgical applications and, more notably, reduces the environmental footprint by diminishing the need for harmful reagents like sodium cyanide. However, a significant implication of this method is the added cost due to the need for heat during the leaching test, amounting to an approximate $30 per ton increase. The alkaline leaching process emerges as a promising solution for arsenic challenges in El Oro’s mining sector. While the findings are encouraging, further expansive tests are recommended to validate the results and underscore the urgency for sustainable and hazard-conscious mining practices.

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Flue gas arsenic trioxide removal from sludge incineration by sulfate-reducing membrane biofilm reactor

Chen

Huang

et al. 2023

Fuel

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A feasible strategy for deep arsenic removal and efficient tungsten recovery from hazardous tungsten residue waste with the concept of weathering process strengthening

Cited by 6 publications

References 30 publications

Recent Advances in the Utilization of Tungsten Residue: A Mini Review of China

Recent Advances in the Utilization of Tungsten Residue: A Mini Review of China

Alkaline Leaching for Arsenic Removal in Gold-Bearing Ore from Miraflores Mine, El Oro, Ecuador

Flue gas arsenic trioxide removal from sludge incineration by sulfate-reducing membrane biofilm reactor

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