Hydrometallurgical stepwise recovery of copper and zinc from smelting slag of waste brass in ammonium chloride solution

Xia, Zhimei; Zhang, Xiaosa; Huang, Xinglong; Yang, Shuai; Chen, Yongming; Ye, Longgang

doi:10.1016/j.hydromet.2020.105475

Cited by 15 publications

(2 citation statements)

References 27 publications

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“…Presently, non-sulfide Zn ore is considered as one of the alternative resources of Zn. However, non-sulfide Zn ores contain comparable levels of impurities (e.g., silica, gypsum, calcite, hematite), resulting in low-grade Zn concentration [1,3]. The hydrometallurgy process is the main method of Zn recovery from sulfide resources, of which 80% of Zn is recovered using inorganic acid (e.g., sulfuric acid and chloride acid).…”

Section: Introductionmentioning

confidence: 99%

Enhanced Recovery of Zn from Carbonate-Type Mixed Oxidized Ore (CMO) by Combining Organic Acid Leaching with Mechanical Activation

Deng

Pan

Chen

et al. 2023

Metals

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With excessive consumption of sulfide ores, using low-grade Pb-Zn mixed ores to obtain Zn has attracted more attention. Acid leaching is an effective method for Zn recovery; however, a high concentration of inorganic acid brings severe environmental issues, including acidic wastewater, contaminated soil, etc. Compared with inorganic acid, organic acid showed lower acidity and toxicity. Herein, we applied an effective method for Zn recovery from carbonate-type Pb-Zn mixed ore (CMO), by combining organic acid leaching with mechanical activation. Among the organic acids applied (lactic, malonic, citric, amber, acetic, and tartaric one), lactic acid was selected for its high leaching efficiency. The optimum condition was identified via response surface methodology, with a lactic acid concentration of 1.15 mol/L, L/S ratio of 20, leaching time of 75 min, and temperature of 75 °C. The effect of mechanical activation on Zn leaching was further investigated. The leaching efficiency increased to 90.1% after mechanical activation, which was the highest leaching efficiency for organic acid leaching. Mineralogical characterization showed that the bulk minerals were milled into small particles while the proportion of amorphization increased. Such activation effects improved the acid-solubility of Zn speciation. This work provided a potential green method for metal recovery from low-grade sources.

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Section: Introductionmentioning

confidence: 99%

Enhanced Recovery of Zn from Carbonate-Type Mixed Oxidized Ore (CMO) by Combining Organic Acid Leaching with Mechanical Activation

Deng

Pan

Chen

et al. 2023

Metals

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“…There are various sources of secondary zinc resources, e.g., hot galvanizing slag [ 5 ] and zinc ash [ 6 ], smelting slag (mud) and zinc-containing dust produced by the copper, lead, and zinc smelting industry [ 7 , 8 , 9 ], electric arc furnace (EAF) dust (mud) from the iron and steel industry [ 10 , 11 ], zinc-loaded waste catalysts [ 12 , 13 , 14 ], waste zinc manganese batteries [ 15 ], and circuit boards [ 16 ]. To date, more than 2 million tons of zinc have been recovered from secondary zinc resources, and at the same time, the growth rate for the recycling of zinc metals, alloys, and zinc compounds has been three times higher than that for the production of original zinc, indicating that the recovery of secondary zinc resources plays an important role in the recycling economy at present.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Mechanism and Kinetics of Ultrasound-Enhanced Sulfuric Acid Leaching for Zinc Extraction from Zinc Oxide Dust

Zheng

Liu

et al. 2022

Materials

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As an important secondary zinc resource, large-scale reserves of zinc oxide dust (ZOD) from a wide range of sources is of high comprehensive recycling value. Therefore, an experimental study on ultrasound-enhanced sulfuric acid leaching for zinc extraction from zinc oxide dust was carried out to investigate the effects of various factors such as ultrasonic power, reaction time, sulfuric acid concentration, and liquid–solid ratio on zinc leaching rate. The results show that the zinc leaching rate under ultrasound reached 91.16% at a temperature of 25 °C, ultrasonic power 500 W, sulfuric acid concentration 140 g/L, liquid–solid ratio 5:1, rotating speed 100 r/min, and leaching time 30 min. Compared with the conventional leaching method (leaching rate: 85.36%), the method under ultrasound increased the zinc leaching rate by 5.8%. In a kinetic analysis of the ultrasound-enhanced sulfuric acid leaching of zinc oxide dust, the initial apparent activation energy of the reaction was 6.90 kJ/mol, indicating that the ultrasound-enhanced leaching process was controlled by the mixed solid product layers. Furthermore, the leached residue was characterized by XRD and SEM-EDS, and the results show that, with ultrasonic waves, the encapsulated mineral particles were dissociated, and the dissolution of ZnO was enhanced. Mostly, the zinc in leached residue existed in the forms of ZnFe2O4, Zn2SiO4, and ZnS.

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Research on Depth Dechlorination by Copper Slag Valence Regulation of Synergistic High-Activity Copper in the Ultrasonic Field

Qu²,

Wang

et al. 2023

Metall Mater Trans B

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Hydrometallurgical stepwise recovery of copper and zinc from smelting slag of waste brass in ammonium chloride solution

Cited by 15 publications

References 27 publications

Enhanced Recovery of Zn from Carbonate-Type Mixed Oxidized Ore (CMO) by Combining Organic Acid Leaching with Mechanical Activation

Enhanced Recovery of Zn from Carbonate-Type Mixed Oxidized Ore (CMO) by Combining Organic Acid Leaching with Mechanical Activation

A Study on the Mechanism and Kinetics of Ultrasound-Enhanced Sulfuric Acid Leaching for Zinc Extraction from Zinc Oxide Dust

Research on Depth Dechlorination by Copper Slag Valence Regulation of Synergistic High-Activity Copper in the Ultrasonic Field

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