Selective recovery of nickel from stainless steel pickling sludge with NH3-(NH4)2CO3 leaching system

Shi, Chunhong; Zuo, Xiangmeng; Yan, Bingji

doi:10.1080/09593330.2022.2056085

Cited by 6 publications

(3 citation statements)

References 43 publications

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“…The optimal ammonia concentration for leaching [NH 3 ] total at pH 8 = 11 was found to be less than 6 mol/L. Shi et al [57] selectively recovered nickel from sludge using the NH 3 -(NH 4 ) 2 CO 3 ammonia leaching system and analyzed the leaching behavior of nickel, iron, and chromium during the ammonia leaching process using Eh-pH diagrams. It was found that nickel can be leached out in the form of the complex [Ni(NH 3 ) n ] 2+ , while iron and chromium are left in the leach residue as precipitates.…”

Section: Ammonia Leaching Methodsmentioning

confidence: 99%

Approaches for the Treatment and Resource Utilization of Electroplating Sludge

Guo,

Wang,

Liu

et al. 2024

Materials

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The disposal of electroplating sludge (ES) is a major challenge for the sustainable development of the electroplating industry. ESs have a significant environmental impact, occupying valuable land resources and incurring high treatment costs, which increases operational expenses for companies. Additionally, the high concentration of hazardous substances in ES poses a serious threat to both the environment and human health. Despite extensive scholarly research on the harmless treatment and resource utilization of ES, current technology and processes are still unable to fully harness its potential. This results in inefficient resource utilization and potential environmental hazards. This article analyzes the physicochemical properties of ES, discusses its ecological hazards, summarizes research progress in its treatment, and elaborates on methods such as solidification/stabilization, heat treatment, wet metallurgy, pyrometallurgy, biotechnology, and material utilization. It provides a comparative summary of different treatment processes while also discussing the challenges and future development directions for technologies aimed at effectively utilizing ES resources. The objective of this text is to provide useful information on how to address the issue of ES treatment and promote sustainable development in the electroplating industry.

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Section: Ammonia Leaching Methodsmentioning

confidence: 99%

Approaches for the Treatment and Resource Utilization of Electroplating Sludge

Guo,

Wang,

Liu

et al. 2024

Materials

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“…This decrease is because when the liquid-solid ratio is low, the reaction system is highly viscous, which inhibits mass transfer and in turn yields a low magnesium extraction ratio. [31] However, as the liquid-solid ratio was increased, the contact area of the two solidliquid phases increased, thus resulting in a higher leaching efficiency. When the liquid-solid ratio is too large, the stirring resistance of the system increases, thus resulting in an incomplete reaction and a decrease in the extraction ratio of magnesium.…”

Section: Influence Of Liquid-solid Ratio On Leaching Processmentioning

confidence: 99%

Leaching kinetics of magnesium extraction from boron mud in ammonium bisulphate solutions

2023

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In this study, the leaching kinetics of magnesium of boron mud (BM) is evaluated using NH4HSO4 solution. The effects of leaching temperature, leaching time, ammonium bisulphate solution concentration and liquid–solid ratio on the extraction ratio of magnesium are investigated. Optimum leaching parameters are determined through an orthogonal test based on single factor experiments. Under the optimum leaching temperature (333 K), leaching time (40 min), NH4HSO4 concentration (2.8 mol · L−1), and liquid–solid ratio (9:1 mL · g−1), the extraction ratio of magnesium was 76.73%. In addition, the leaching kinetics data of magnesium from BM are analyzed through graphical and statistical approaches, which reveal that the leaching process conforms to the grain model. The leaching process is diffusion‐controlled with an activation energy of 41.67 kJ · mol−1.

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“…Ku Heesuk et al [ 10 ] investigated an ammonia leaching method for the recovery of heavy metals from the cathode materials of used lithium-ion batteries using ammonia, ammonium thiosulphate, and ammonium carbonate. Chunhong Shi et al [ 11 ] used a new method for the selective recovery of nickel from stainless steel pickling sludge (SSPS) using the NH3-(NH 4 ) 2 CO 3 ammonia leaching system. In terms of microbiological methods [ 12 ], the study conducted by Yang et al [ 13 ] optimised the recovery of nickel from electroplating sludge by comparing three different bioleaching systems, especially using the sulphur–sulphate bacillus system.…”

Section: Introductionmentioning

confidence: 99%

Research on Resource Recovery and Disposal of Copper-Containing Sludge

Yu,

Zhou

2024

Materials

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Copper-containing sludge is a common by-product of industrial activities, particularly electroplating and metal processing. This type of sludge contains high concentrations of heavy metals such as copper, which can pose a potential threat to the environment. Therefore, its treatment and disposal require special attention. Due to its efficient mass and heat transfer characteristics, the suspended state technology has shown significant potential for application in a number of key processes, including the drying, decomposition, and reduction of copper-containing sludge. This paper presents an in-depth analysis of the current status of the application of the suspended state technology in the treatment of copper-containing sludge. Based on this analysis, a device for the treatment of copper-containing sludge in the suspended state was designed, through which the characteristics of copper-containing sludge in the oxidative decomposition and reduction phases are investigated. The research objects were gas concentration, temperature, contact state, and particle size time. Orthogonal experiments were initially employed to investigate the relationship between the influencing factors and the conversion rate of copper oxides. This was followed by a single-factor influence study, which led to the determination of the optimal process parameters for the decomposition experiments of the Cu-containing sludge in an oxidizing atmosphere. The 100 μm Cu-containing sludge was reacted with 10% O2 gas at a flow rate of 1 m/s for 3 min under the condition of 900 °C. The process parameters were then determined as follows: The research objects were gas concentration, temperature, contact state, and particle size time. Orthogonal experiments were employed to investigate the relationship between the influencing factors and the copper conversion rate. This was followed by a single-factor influence study, which determined the optimal process parameters for the copper-containing sludge reduction experiments. The 200 μm copper-containing sludge was reacted for 5 min at a flow rate of 7% carbon monoxide at a flow rate of 1.5 m/s under the condition of 800 °C.

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Selective recovery of nickel from stainless steel pickling sludge with NH₃-(NH₄)₂CO₃ leaching system

Cited by 6 publications

References 43 publications

Approaches for the Treatment and Resource Utilization of Electroplating Sludge

Approaches for the Treatment and Resource Utilization of Electroplating Sludge

Leaching kinetics of magnesium extraction from boron mud in ammonium bisulphate solutions

Research on Resource Recovery and Disposal of Copper-Containing Sludge

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