Ultrasound-assisted HCl–NaCl leaching of lead-rich and antimony-rich oxidizing slag

Zhang, Rong Liang; Zhang, Xiao Fei; Tang, Shu Zhen; Huang, Ai Dong

doi:10.1016/j.ultsonch.2015.05.020

Cited by 71 publications

(17 citation statements)

References 14 publications

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“…However, Pb can still be leached by applying HCl. According to Zhang et al 31 , Pb forms differently coordinated Pb 2+ complexes with Cl, as per the following reaction: …”

Section: Resultsmentioning

confidence: 99%

Hydrometallurgical Recovery of Metals from Large Printed Circuit Board Pieces

Jadhav

Hocheng

2015

Sci Rep

166

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The recovery of precious metals from waste printed circuit boards (PCBs) is an effective recycling process. This paper presents a promising hydrometallurgical process to recover precious metals from waste PCBs. To simplify the metal leaching process, large pieces of PCBs were used instead of a pulverized sample. The chemical coating present on the PCBs was removed by sodium hydroxide (NaOH) treatment prior to the hydrometallurgical treatment. Among the leaching reagents examined, hydrochloric acid (HCl) showed great potential for the recovery of metals. The HCl-mediated leaching of waste PCBs was investigated over a range of conditions. Increasing the acid concentration decreased the time required for complete metal recovery. The shaking speed showed a pronounced positive effect on metal recovery, but the temperature showed an insignificant effect. The results showed that 1 M HCl recovered all of the metals from 4 cm × 4 cm PCBs at room temperature and 150 rpm shaking speed in 22 h.

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“…However, Pb can still be leached by applying HCl. According to Zhang et al 31 , Pb forms differently coordinated Pb 2+ complexes with Cl, as per the following reaction: …”

Section: Resultsmentioning

confidence: 99%

Hydrometallurgical Recovery of Metals from Large Printed Circuit Board Pieces

Jadhav

Hocheng

2015

Sci Rep

166

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“…And the increasing reactant concentration could also put a negative effect on solution viscosity. The diffusion rate of diffusion boundary layer is expressed as Equation 9 30 :…”

Section: Interaction Effects Of the Variablesmentioning

confidence: 99%

Optimization of purification treatment of spent cathode carbon from aluminum electrolysis using response surface methodology (RSM)

Yuan

Xiao

Tian

et al. 2017

Asia-Pacific J Chem Eng

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Purification treatment and carbon recovery of the spent cathode carbon (SCC) from aluminum electrolysis were optimized using response surface methodology (RSM) in caustic leaching process and purified further by acid leaching. The purity of treated SCC was 96.43%. A Box-Behnken design based on a single-factor experiment was utilized to model 3 independent variables, namely, temperature (55-85°C), time (70-110 min), and initial alkali-material ratio (0.15-0.35), to investigate their responses to the carbon content of caustic leaching residue. A multivariate quadratic regression equation model was established according to RSM principles. Results revealed that the carbon content of caustic leaching residue was significantly influenced by the initial alkali-material ratio, temperature, and time, sorted from big to small. Interactions of any 2 of the 3 factors significantly affected the response. RSM is thus successfully applied in the optimization of the SCC impurities removal process.

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“…Ultrasonic waves are sound waves with special frequency [12]. The wide applications of ultrasonic waves in the field of hydrometallurgy are attributed to the cavitation effect generated from their use [13]. Shen et al successfully improved the leaching rate of indium by employing a high temperature-ultrasonic acid leaching method, and the leaching time was decreased when there was ultrasound assistance [14].…”

Section: Introductionmentioning

confidence: 99%

Roasting Pretreatment Combined with Ultrasonic Enhanced Leaching Lead from Electrolytic Manganese Anode Mud

Xie

Zhang

et al. 2019

Metals

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A method of conventional roasting pretreatment combined with ultrasonic enhanced leaching with ammonium acetate was proposed to solve the difficult problem of lead in electrolytic manganese anode mud. The effects of concentration, liquid–solid ratio, temperature, leaching time and rotating speed on the leaching process under conventional and ultrasonic conditions were studied, and the lead leaching rate can be as high as 93.09% under optimized process parameters. A leaching kinetic model under conventional and ultrasonic conditions was established to explore the restrictive links of the leaching process. The results show that the leaching process under both conventional and ultrasonic conditions is controlled by diffusion, and the activation energies are 29.40 kJ/mol and 26.95 kJ/mol for the conventional and ultrasound enhance leaching processes, respectively.

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Ultrasound-assisted HCl–NaCl leaching of lead-rich and antimony-rich oxidizing slag

Cited by 71 publications

References 14 publications

Hydrometallurgical Recovery of Metals from Large Printed Circuit Board Pieces

Hydrometallurgical Recovery of Metals from Large Printed Circuit Board Pieces

Optimization of purification treatment of spent cathode carbon from aluminum electrolysis using response surface methodology (RSM)

Roasting Pretreatment Combined with Ultrasonic Enhanced Leaching Lead from Electrolytic Manganese Anode Mud

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