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Articles de revues sur le sujet « Zinc leaching »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 31 juillet 2025

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1

Yang, Jinlin, Xingnan Huo, Zongyu Li, and Shaojian Ma. "Study on Hydrometallurgical Treatment of Oxide Ores Bearing Zinc." Minerals 12, no. 10 (2022): 1264. http://dx.doi.org/10.3390/min12101264.

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As the depletion of zinc sulfide ores becomes more severe, investigations into the recovery of zinc from zinc oxide ores have aroused more interest. In this regard, acid-based hydrometallurgical treatment strategies have had great effectiveness. However, they are inadequate for low-grade zinc oxide ores. In this study, we examined the alkaline treatment of gossan for the recovery of oxide ores that bear zinc, such as siderite and limonite. Additionally, of particular note, the effects of a leaching agent, its concentration and time, temperature, liquid-to-solid ratio, as well as the agitation

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2

Ma, Shao Jian, Gui Fang Wang, Jin Lin Yang, Shao Juan Que, Li Qun Tang, and Jin Peng Feng. "Study on Preparation Process of Zinc Ferrite." Advanced Materials Research 201-203 (February 2011): 1736–40. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.1736.

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Zinc ferrite is usually formed during the roasting of zinc sulfide concentrate with high content of iron and reduces zinc recovery during the leaching of zinc calcine. Because it is difficult to find pure zinc ferrite in nature ore resources or in chemicals market, which impedes the investigation of the reaction characteristics of zinc ferrite and the seek of new technologies for zinc ferrite dissolution, so it is of significance to obtain relatively pure zinc ferrite for further research on zinc calcine leaching. This article investigated the preparation process of zinc ferrite based on the d

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3

Wang, Jingxiu, Zhe Wang, Zhongzhi Zhang, and Guangqing Zhang. "Comparison of Butyric Acid Leaching Behaviors of Zinc from Three Basic Oxygen Steelmaking Filter Cakes." Metals 9, no. 4 (2019): 417. http://dx.doi.org/10.3390/met9040417.

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The selective leaching of zinc from three different basic oxygen steelmaking (BOS) filter cakes by butyric acid was investigated to compare the leaching behaviors of zinc and further to establish the correlation of the zinc leaching performances and the chemical compositions. The effects of acid concentration and the acid to solid (L/S) stoichiometric ratio were studied, with different optimal leaching conditions obtained. BOS-1 showed the lowest leachability with only less than 10% of zinc removed by 0.5 M acid concentration and 90% of the L/S stoichiometric ratio in 10 h. The best zinc selec

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4

Zhang, Ya Li, Xian Jin Yu, Xiao Na Guo, and Xiao Bin Li. "Recovery Technology of Zinc from Hydrometallurgical Zinc Residues." Advanced Materials Research 396-398 (November 2011): 620–23. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.620.

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In this work, it was aimed to select and propose a feasible as well as an applicable method, or series of methods for the extraction of zinc. After determination of the components of the residue, water leaching, acid leaching and roasting-leaching were performed to reclaim Zn. Roasting-leaching was found to be effectively for Zn extraction by controlling acid mass, roasting duration and temperature as parameters. At the optimum conditions, 0.7 times the amount of H2SO4 at 250 °C for 150 min in roasting, 82.05% of initial Zn content was extracted.

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5

Yang, Jin Lin, Hong Mei Zhang, Xiu Juan Su, and Shao Jian Ma. "Study on Leaching Zinc Calcine with High Iron." Advanced Materials Research 826 (November 2013): 118–21. http://dx.doi.org/10.4028/www.scientific.net/amr.826.118.

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In recent years, recovering zinc from zinc calcine with high iron has been a matter of discussion. In this paper, sulfuric acid leaching was carried out to assess the effect of several parameters on zinc and iron extraction in zinc calcine with high iron in which the grade of zinc and iron is 53.90% and 19.38%, respectively. Parameters, such as stirring speed, sulfuric acid concentration, liquid to solid ratio and leaching time, were investigated. The results show that leaching time has done nothing to the leaching rate, but has great influence on leaching efficiency. Liquid to solid ratio and

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6

Li, Hui, Yutian Fu, Jinglong Liang, Le Wang, Hongyan Yan, and Linfei Zhao. "Preparation of Zinc Oxide and Zinc Ferrite from Zinc Hypoxide by Wet Process and Electrochemistry." Crystals 11, no. 9 (2021): 1133. http://dx.doi.org/10.3390/cryst11091133.

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With the increase of zinc resource consumption, the recovery and utilization of zinc resources in zinc suboxide has become one of the current research hotspots. In this study, the electrochemical method was used to remove the impurities in the zinc leaching night and enrich the zinc ferrite in the ammonia leaching residue for the solution and ammonia leaching slag after the ammonia leaching of zinc hypoxide, in order to realize the comprehensive utilization of the essence of zinc immersion night and new resources. The results showed that the reduction potentials of copper, lead, cadmium, and z

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7

Zhang, Limin, Yunyan Wang, Yong Ke, et al. "A novel leaching process of zinc ferrite and its application in the treatment of zinc leaching residue." Journal of Physics: Conference Series 2738, no. 1 (2024): 012027. http://dx.doi.org/10.1088/1742-6596/2738/1/012027.

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Abstract Zinc ferrite is a refractory phase generated in the pyrometallurgical process of zinc and steel production. Much energy is invested in the decomposition of zinc ferrite to recycle zinc since zinc ferrite is difficult to leach. In this work, a novel leaching process targeted at decomposition of zinc ferrite was proposed to save energy and improve metal recovery efficiency. The key of this novel leaching process was the use of copper powder as the reductant. Leaching of zinc ferrite in the presence of copper powder was investigated. The extraction of zinc was 100% when molar ratio of co

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8

Zhang, Qian, Qicheng Feng, Shuming Wen, Chuanfa Cui, and Junbo Liu. "A Novel Technology for Separating Copper, Lead and Zinc in Flotation Concentrate by Oxidizing Roasting and Leaching." Processes 7, no. 6 (2019): 376. http://dx.doi.org/10.3390/pr7060376.

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In this work, oxidizing roasting was combined with leaching to separate copper, lead, and zinc from a concentrate obtained by bulk flotation of a low-grade ore sourced from the Jiama mining area of Tibet. The flotation concentrate contained 7.79% Cu, 22.00% Pb, 4.81% Zn, 8.24% S, and 12.15% CaO; copper sulfide accounted for 76.97% of the copper, lead sulfide for 25.55% of the lead, and zinc sulfide for 67.66% of the zinc. After oxidizing roasting of the flotation concentrate, the S content in the roasting slag decreased to 0.22%, indicating that most sulfide in the concentrate was transformed

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9

Zheng, Xuemei, Shiwei Li, Bingguo Liu, Libo Zhang, and Aiyuan Ma. "A Study on the Mechanism and Kinetics of Ultrasound-Enhanced Sulfuric Acid Leaching for Zinc Extraction from Zinc Oxide Dust." Materials 15, no. 17 (2022): 5969. http://dx.doi.org/10.3390/ma15175969.

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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 co

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10

Zhang, Jinxia, Jiajing Dong, Fusheng Niu, and Chao Yang. "Properties and Kinetics of Selective Zinc Leaching with Choline Chloride and Urea." Minerals 11, no. 8 (2021): 857. http://dx.doi.org/10.3390/min11080857.

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A choline chloride-urea (ChCl-urea) deep eutectic solvent (DES) was used to experimentally investigate the secondary recovery of zinc from zinc-bearing dust sludge via a leaching process. The effects of varying the liquid–solid ratio, leaching temperature, stirring speed, and leaching time on the zinc leaching efficiency were determined, and the optimum values of these parameters were found to be 15:1, 90 °C, 400 rpm, and 600 min, respectively, at which a leaching efficiency of 86.87% was achieved. XRF and EDS analyses confirmed that the zinc content in the sludge decreased noticeably after le

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11

Yang, Jin Lin, Shao Jian Ma, Wei Mo, Jin Peng Feng, Xiu Juan Su, and Gui Fang Wang. "Study on Recovering Zinc from Gossan." Advanced Materials Research 454 (January 2012): 329–32. http://dx.doi.org/10.4028/www.scientific.net/amr.454.329.

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In this paper, the conventional physical separation method such as flotation, gravity separation, magnetic separation, alkaline leaching and sulfuric acid leaching were studied. The effects of grinding fineness, amount of agent, magnetic intensity, roasting temperature, roasting time, the leaching agent and leaching time on the leaching of zinc were investigated, respectively. The results show that the leaching rate of zinc is below 50% in the conventional alkaline leaching, and the leaching rate of zinc is below 85% and the leaching rate of iron is above 35% in sulfuric acid leaching. Compare

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12

Wu, Dan Dan, Shu Ming Wen, Jing Yang, Yi Jie Wang, and Chao Lv. "A Study on Leaching of Zinc Oxide Ore in Ammonium Sulfate Solution." Applied Mechanics and Materials 522-524 (February 2014): 1463–66. http://dx.doi.org/10.4028/www.scientific.net/amm.522-524.1463.

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In this paper, the leaching effect of zinc oxide ore was investigated using ammonium sulfate solution as leaching agent. The effects of temperature, concentration of ammonium sulfate, average particle size and stirring speed on the leaching of zinc oxide ore were studied. The leaching rate increased with increasing solution temperature, concentration, and stirring speed as well as with decreasing average particle size. Ammonium sulfate solution can therefore be used as an effective leaching agent for zinc extraction from zinc oxide ore.

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13

LI, Yong Jia, and Da Jin Yang. "Study of Leaching Zinc from Difficult Dealt Zinc Oxide Ore with High Silicon in the Alkali." Advanced Materials Research 1120-1121 (July 2015): 105–9. http://dx.doi.org/10.4028/www.scientific.net/amr.1120-1121.105.

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In this paper, the influencing factors in the process of alkali leaching of refractory zinc oxidize ores were studied. The influence of the particle size, reaction temperature, leaching time, alkali concentration and liquid-solid ratio on the leaching efficiency of zinc were investigated via leaching tests. The results indicate that the particle size has little influence on the leaching efficiency of zinc while the influences of other factors are larger. The optimal leaching condition is: the reaction temperature is 80 °C, the alkali concentration is 4.5 mol/L, and the leaching time is 1.5 h a

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14

Ma, Aiyuan, Jinjing Li, Jun Chang, and Xuemei Zheng. "Mechanism Analysis and Experimental Research on Leaching Zn from Zinc Oxide Dust with an Ultrasound-Enhanced NH3-NH4Cl-H2O System." Sustainability 16, no. 7 (2024): 2901. http://dx.doi.org/10.3390/su16072901.

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Zinc oxide dust (ZOD) is an industrial solid waste produced in the production process of wet smelting Zn, with large output and great pollution to the environment. The recycling of metallurgical solid waste such as zinc oxide dust is very important to achieve the sustainable development of the circular economy. An experimental study of zinc (Zn) leaching from zinc oxide dust using an ultrasound-enhanced ammonia–ammonium chloride system was performed. The effects of ultrasonic power, leaching time, total ammonia concentration, and other factors on the leaching rate of zinc from zinc oxide dust

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15

Leelarungroj, Kittitat, Suched Likitlersuang, Thanakorn Chompoorat, and Dao Janjaroen. "Leaching mechanisms of heavy metals from fly ash stabilised soils." Waste Management & Research: The Journal for a Sustainable Circular Economy 36, no. 7 (2018): 616–23. http://dx.doi.org/10.1177/0734242x18775494.

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Fly ash is an industrial waste material that is repurposed as a soil stabiliser worldwide. In Thailand, many ground improvement projects utilise mixtures of cement and fly ash to stabilise weak soils. In this study, leaching mechanisms of arsenic, chromium, lead, and zinc from cement and fly ash stabilised soils were investigated in the laboratory. Leaching tests were performed, with different leachants and pH conditions, on cement and fly ash stabilised soils used for soil improvement in road embankment construction projects in Northern Thailand. The results suggested that chemical compounds

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16

Xu, Hong Sheng, Chang Wei, Cun Xiong Li, Yan Song, Zhi Gan Deng, and Gang Fan. "Kinetics of Pressure Acid Leaching of Zinc from Zinc Silicate Ore." Advanced Materials Research 402 (November 2011): 266–71. http://dx.doi.org/10.4028/www.scientific.net/amr.402.266.

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The present work is concerned with the kinetic study of pressure leaching of zinc silicate ore in sulfuric acid solutions. The effects of leaching temperature, particle size, sulfuric acid concentration and agitation speed on the zinc extraction were evaluated. The results obtained show that the zinc extraction increases with increasing sulfuric acid concentration and leaching temperature. The leaching kinetics was analyzed by using a shrinking core model with diffusion control given by: 1-2/3x-(1-x)2/3=Kt, which represented well the experimental data. The apparent activation energy was determ

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17

Skrzekut, Tomasz, Andrzej Piotrowicz, Piotr Noga, Maciej Wędrychowicz, and Adam W. Bydałek. "Studies of Selective Recovery of Zinc and Manganese from Alkaline Batteries Scrap by Leaching and Precipitation." Materials 15, no. 11 (2022): 3966. http://dx.doi.org/10.3390/ma15113966.

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Recovery of zinc and manganese from scrapped alkaline batteries were carried out in the following way: leaching in H2SO4 and selective precipitation of zinc and manganese by alkalization/neutralization. As a result of non-selective leaching, 95.6–99.7% Zn was leached and 83.7–99.3% Mn was leached. A critical technological parameter is the liquid/solid treatment (l/s) ratio, which should be at least 20 mL∙g−1. Selective leaching, which allows the leaching of zinc only, takes place with a leaching yield of 84.8–98.5% Zn, with minimal manganese co-leaching, 0.7–12.3%. The optimal H2SO4 concentrat

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18

Picazo-Rodríguez, Nallely G., Ma de Jesus Soria-Aguilar, Antonia Martínez-Luévanos, Isaias Almaguer-Guzmán, Josue Chaidez-Félix, and Francisco Raul Carrillo-Pedroza. "Direct Acid Leaching of Sphalerite: An Approach Comparative and Kinetics Analysis." Minerals 10, no. 4 (2020): 359. http://dx.doi.org/10.3390/min10040359.

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The present work reports the direct leaching of zinc from a sphalerite concentrate in acid media. Lab-scale and pilot-scale experiments were conducted in atmospheric-pressure and low-pressure reactors, respectively. Leaching of zinc and precipitation of iron was achieved in the same stage using different reagents like Fe3+, O2, O3, and Fe2+ (which is continuously oxidized in the leaching solution by H2O2 and O2). The highest percentage of zinc extraction (96%) was obtained in pilot-scale experiments using H2SO4, Fe2+, and O2. Experimental results were compared with those of other researchers t

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19

Jiang, Tao, Fei-yu Meng, Wei Gao, et al. "Leaching behavior of zinc from crude zinc oxide dust in ammonia leaching." Journal of Central South University 28, no. 9 (2021): 2711–23. http://dx.doi.org/10.1007/s11771-021-4803-x.

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20

Niu, Fusheng, Ziheng Bu, Jinxia Zhang, Shengtao He, and Zhenjia Chang. "Zn Extraction from Zinc-Containing Sludge Using Ultrasonic Treatment Leaching with ChCl-MA DES." Metals 13, no. 7 (2023): 1192. http://dx.doi.org/10.3390/met13071192.

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The recovery of zinc from metallurgical dust sludge is a crucial component of using solid waste as a resource in the metallurgical process, and deep eutectic solvent–ultrasonic synergistic enhanced leaching is an efficient method of doing so with excellent economic effects. The leaching rate of zinc is used as the value of response in this study, along with the four process conditions of leaching temperature, leaching time, liquid–solid ratio, and ultrasonic power. By building a regression model, the relationship between the various parameter components is investigated, and a strategy for opti

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21

Yang, Jinlin, Hangyu Li, Zongyu Li, et al. "Study on Sulfuric Acid Leaching and Purification of Zinc Ferrite by Roasting Zinc-Containing Gossan Ore." Processes 11, no. 7 (2023): 2149. http://dx.doi.org/10.3390/pr11072149.

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Gossan discarded from mining processes result in metal resource wastage, and its long-term stacking causes environmental hazards. Therefore, this article considers zinc-containing gossan as the research object. The ore was roasted to prepare primary zinc ferrite products and sulfuric acid leaching was performed for purification. Then, XRD analysis was performed to characterize the purified products. The results indicated that the effect of sulfuric acid concentration on the purification of the products was related to its zinc ferrite content. Furthermore, the effect of leaching temperature on

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Niu, Fusheng, Shengtao He, Jinxia Zhang, and Chen Wen. "Study on Ultrasonically-Enhanced Deep Eutectic Solvents Leaching of Zinc from Zinc-Containing Metallurgical Dust Sludge." Metals 12, no. 11 (2022): 1856. http://dx.doi.org/10.3390/met12111856.

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In this study, the zinc containing dust and sludge of iron and steel smelting was taken as the research object, and the new ionic liquid of choline-urea was prepared and synthesized as the leaching agent. The conventional and ultrasonic leaching of zinc were compared, and the influence of liquid-solid ratio, temperature, time, ultrasonic power and other conditions on the zinc leaching rate were analyzed. The leaching residue was characterized by Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), X-ray diffraction (XRD), and the kinetic equations of ligand leaching based

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23

Liu, Chen, Hang Jun He, Duo Qiang Liang, et al. "Influence of the Mechanical Activation on the Reactivity of Germanium-Containing Zinc Neutral Leaching Residue." Advanced Materials Research 581-582 (October 2012): 868–72. http://dx.doi.org/10.4028/www.scientific.net/amr.581-582.868.

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Zinc neutral leaching residue from conventional roast-leach-electrowin often contains a considerable content of germanium. In two-stage leaching process (weak acid leaching and hot acid leaching), dissolution yield of germanium as well as zinc is low due to the compact structure of the residue. In the paper, an attempt of increasing their dissolution yield was made by pretreatment of mechanical activation. The experimental results obtained show that the activated residue has much faster leaching kinetics, and that according to current technical standard operating in Yunnan Chihong Zinc & G

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24

Prasetyo, Erik, Corby Anderson, Fajar Nurjaman, et al. "Monosodium Glutamate as Selective Lixiviant for Alkaline Leaching of Zinc and Copper from Electric Arc Furnace Dust." Metals 10, no. 5 (2020): 644. http://dx.doi.org/10.3390/met10050644.

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The efficacy of monosodium glutamate (MSG) as a lixiviant for the selective and sustainable leaching of zinc and copper from electric arc furnace dust was tested. Batch leaching studies and XRD, XRF and SEM-EDS characterization confirmed the high leaching efficiency of zinc (reaching 99%) and copper (reaching 86%) leaving behind Fe, Al, Ca and Mg in the leaching residue. The separation factor (concentration ratio in pregnant leach solution) between zinc vs. other elements, and copper vs. other elements in the optimum condition could reach 11,700 and 250 times, respectively. The optimum conditi

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Xie, Zeqiang, Tao Jiang, Feng Chen, Yufeng Guo, Shuai Wang, and Lingzhi Yang. "Phase Transformation and Zinc Extraction from Zinc Ferrite by Calcium Roasting and Ammonia Leaching Process." Crystals 12, no. 5 (2022): 641. http://dx.doi.org/10.3390/cryst12050641.

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Zinc ferrite (ZnFe2O4), one of the major forms of zinc in electric arc furnace dust and zinc leaching residue, is very difficult to chemically dissolve in either acidic or alkaline solutions. It is therefore necessary to study the extraction of zinc from zinc ferrite to achieve the full recovery of the zinc resources. In this paper, CaO was used to degrade the structure of zinc ferrite and then the ammonia leaching method was applied to recover zinc. The thermodynamic analysis indicated that the zinc ferrite could react with CaO to form zinc oxide and dicalcium ferrite. The CaO–Fe2O3–ZnO phase

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Li, Yaohong, Shuming Wen, Jing Cao, Dandan Wu, and Yijie Wang. "Leaching Kinetics of Hemimorphite with 5-Sulfosalicylic Acid." Metals 13, no. 7 (2023): 1249. http://dx.doi.org/10.3390/met13071249.

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The kinetics of leaching zinc from hemimorphite was investigated. The factors that influence hemimorphite leaching were also evaluated, and a kinetic model was built. In addition, scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) was used to investigate the changes of surface morphology before and after leaching. By decreasing particle size and increasing temperature, 5-sulfosalicylic acid concentration, and stirring speed, the leaching rate of hemimorphite can be enhanced. The shrinkage nucleus model describes the surface chemistry of leaching. The activation energy of hem

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Bulaev, Aleksandr, Vitaliy Melamud, and Anna Boduen. "Two-Stage Agitation Leaching of Old Flotation Tailings." Solid State Phenomena 298 (October 2019): 116–20. http://dx.doi.org/10.4028/www.scientific.net/ssp.298.116.

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The goal of the present work was to develop hydrometallurgical approaches based on acid leaching for selective extraction of base metals from the sample of old flotation tailings as well as obtaining solution, which can be used for leaching of substandard copper-zinc concentrate. Old flotation tailings contained 23.2% of iron, 0.36% of copper, and 0.23% of zinc. Copper-zinc concentrate contained 23.8% of iron, 16% of copper, and 5.3% of zinc. Agitation leaching of old flotation tailings with distilled water and sulfuric acid solutions (of 0.5 to 10% H2SO4) for 3 h at pulp density of 20% made i

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Xie, Zeqiang, Tao Jiang, Yufeng Guo, et al. "Separation of Zinc from Zinc Ferrite by Magnetization Roasting and Ammonia Leaching." Separations 10, no. 5 (2023): 299. http://dx.doi.org/10.3390/separations10050299.

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Zinc ferrite can be found in zinc-bearing dust in ironmaking and steelmaking. It is difficult to be recovered due to its stable properties. The magnetization roasting and ammonia leaching method were used to separate iron and zinc from zinc ferrite in this study. Thermodynamic analysis showed that the key to the selective reduction of zinc ferrite to zinc oxide and ferric oxide is to control the appropriate temperature and atmosphere. The influences of the selective reduction roasting process of zinc ferrite on the conversion rate, phase change, and microevolution behavior were investigated. T

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Prica, Miljana, Milena Dalmacija, Bozo Dalmacija, Jelena Trickovic, and Snezana Maletic. "The use of cardboard factory sludge in the remediation of zinc contaminated sediment." Journal of the Serbian Chemical Society 77, no. 8 (2012): 1097–107. http://dx.doi.org/10.2298/jsc111111022p.

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Paper and cardboard factory sludges are generated by various processes during pulp, cardboard and paper production, and the increasing quantities produced make the disposal of this sludge a problem. This study investigates the use of cardboard factory sludge as a stabilizing agent in the solidification/stabilization (S/S) treatment of zinc polluted sediment. Semidynamic and toxicity leaching tests were conducted to assess the effectiveness of the solidification/stabilization treatment and long-term zinc leaching behaviour. A diffusion-based model was used to elucidate the controlling leaching

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Yang, Jin Lin, Hong Mei Zhang, Gui Fang Wang, Shao Jian Ma, and Min Zhang. "Sulfuric Acid Leaching on Low Grade Oxide Ore." Advanced Materials Research 826 (November 2013): 122–25. http://dx.doi.org/10.4028/www.scientific.net/amr.826.122.

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In this paper, sulfuric acid leaching was carried out to assess the effect of several parameters on metal extraction in a low grade complex gossan ore in which the grade of zinc and iron is 13% and 40.2%, respectively. Parameters, such as sulfuric acid concentration, liquid to solid ratio and leaching temperature, were studied. The results show that the zinc leaching rate is almost 80%, while the iron leaching rate is about 45% used strong acid with 200g/L. It can be seen from the results that sulfuric acid leaching could not effectively recover zinc from gossan ores studied in this paper beca

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Wang, Zhenqi, Hui Ge, Feng Xie, Shaohua Wu, and Wang Wei. "Selective Recovery of Metallic Zinc from Zinc Leaching Residue by Calcification Roasting and Acid Leaching." Materials 18, no. 4 (2025): 738. https://doi.org/10.3390/ma18040738.

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It is essential to recycle zinc leaching residue (ZLR) generated by the conventional zinc hydrometallurgy process, as it is a hazardous and potentially valuable industrial waste. A combined calcification roasting–acid leaching process was developed to selectively separate and recover zinc from ZLR. This work investigates the effectiveness of using calcium oxide as an additive to transform zinc ferrite during the roasting process. The feasibility of the reaction was investigated based on thermodynamic calculations and compositional analysis. The transformation ratio of zinc ferrite reached 95.2

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Li, Jia Feng, Lin Lin Tong, Qiao Chen, Zhe Nan Jin, and Hong Ying Yang. "Bioleaching Experiments on a Low-Grade Complex Zinc Ore from Inner Mongolia." Solid State Phenomena 262 (August 2017): 155–58. http://dx.doi.org/10.4028/www.scientific.net/ssp.262.155.

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When dealing with a low-grade complex Zinc ore from Inner Mongolia, problems of low leaching rate, high energy consumption, low economic benefits and pollution were encountered. To treat this low-grade zinc ore economically and effectively, bioleaching was used. This approach produces reliable data for an environmentally friendly and efficient processing of the zinc ore. The results indicate that Zinc occurs in the ore mainly as sphalerite, the latter also containing Indium. The experimental results demonstrated an excellent leaching performance: A leaching rate of nearly 100% is achieved at a

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Du, Yunpeng, Xiong Tong, Xian Xie, Wenjie Zhang, Hanxu Yang, and Qiang Song. "Recovery of Zinc and Silver from Zinc Acid-Leaching Residues with Reduction of Their Environmental Impact Using a Novel Water Leaching-Flotation Process." Minerals 11, no. 6 (2021): 586. http://dx.doi.org/10.3390/min11060586.

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Zinc-leaching residue (ZLR) is a strongly acidic hazardous waste; it has poor stability, high heavy metal levels, and releases toxic elements into the environment. ZLR has potential as a valuable resource, because it contains elevated levels of zinc and silver. In this paper, the recovery of zinc (Zn) and silver (Ag) from ZLR wastes from zinc hydrometallurgy workshops using water leaching followed by flotation was studied. During water leaching experiments, the zinc and copper recovery rates were 38% and 61%, respectively. Thereafter, various flotation testing parameters were optimized and inc

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Ferella, Francesco, Ida De Michelis, Francesca Beolchini, Valentina Innocenzi, and Francesco Vegliò. "Extraction of Zinc and Manganese from Alkaline and Zinc-Carbon Spent Batteries by Citric-Sulphuric Acid Solution." International Journal of Chemical Engineering 2010 (2010): 1–13. http://dx.doi.org/10.1155/2010/659434.

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The paper is focused on the recovery of zinc and manganese from alkaline and zinc-carbon spent batteries. Metals are extracted by sulphuric acid leaching in the presence of citric acid as reducing agent. Leaching tests are carried out according to a24full factorial design, and empirical equations for Mn and Zn extraction yields are determined from experimental data as a function of pulp density, sulphuric acid concentration, temperature, and citric acid concentration. The highest values experimentally observed for extraction yields were 97% of manganese and 100% of zinc, under the following op

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35

Wang, Jie, Wei Xiong, and Bao Ping Zhang. "Experimental Study on Zinc Leaching of Blast Furnace Gas Ash by Ammonia Leaching." Advanced Materials Research 962-965 (June 2014): 780–83. http://dx.doi.org/10.4028/www.scientific.net/amr.962-965.780.

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Blast furnace gas ash is one of the main solid wastes in iron and steel enterprise. The recovery of zinc from gas ash can result in considerable economic and environmental benefits. The effect of NH3/NH4+, L/S, [NH3]T and leaching time on the zinc leaching rate of blast furnace gas ash by using ammonia leaching process had been investigated in this paper. The results show that L/S and NH3/NH4+ are the main influence factors under the experimental condition. The optimal conditions for leaching process are: NH3/NH4+=2:1, L/S=4:1, [NH3]T =5mol/L, and the leaching time is 3 hours. The zinc leachin

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Ozberk, E., M. J. collins, M. Makwana, I. M. Masters, R. PülIenberg, and W. Bahl. "Zinc pressure leaching at the Ruhr-Zink refinery." Hydrometallurgy 39, no. 1-3 (1995): 53–61. http://dx.doi.org/10.1016/0304-386x(95)00044-h.

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Deng, F. L., G. X. Xu, W. W. Fan, S. Li, and R. X. Ma. "Atmospheric curing of zinc sulfide concentrate by sulfuric acid below 300°C." Journal of Mining and Metallurgy, Section B: Metallurgy, no. 00 (2022): 16. http://dx.doi.org/10.2298/jmmb220302016d.

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Because the traditional roasting-leaching-electrowinning zinc hydrometallurgy process has a small sulfuric acid sales radius and a high inventory pressure, the process of direct leaching zinc concentrate is gaining popularity. but the pressurized leaching process is a high-pressure condition, which requires strict equipment material and high safety requirements. Furthermore, the atmospheric leaching efficiency is low and generally introduces impurities and chloride ions, which increase the cost of subsequent decontamination. Therefore, a new environmentally friendly hydrometallurgy extraction

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Wang, Zhongxue, Yun He, Weian Wang, Yongkun Yang, Guoxing Qiu, and Xiaoming Li. "Study on Preparation of Nano-ZnO by Zinc Hypoxide in Rotary Hearth Furnace." Metals 12, no. 8 (2022): 1364. http://dx.doi.org/10.3390/met12081364.

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To realize the high value-added utilization of zinc hypoxide in a rotary hearth furnace, nano-ZnO was prepared by H2SO4 wet leaching combined with the Na2CO3 precipitation process. The effects of different process conditions on the leaching rate of Zn were analyzed, and the feasibility of preparing nano-ZnO from zinc hypoxide was discussed. The results showed that the optimal process conditions for H2SO4 leaching of zinc hypoxide in a rotary hearth furnace were as follows: H2SO4 concentration 2.0 mol·L−1, leaching temperature 60 °C, leaching time 90 min, and liquid-solid ratio 8:1. Under these

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Guo, Jihao, Hongao Xu, Bo Li, Yonggang Wei, and Hua Wang. "Leaching kinetics of copper and valuable metal extraction from copper-cadmium residues of zinc hydrometallurgy by oxidation acid leaching." International Journal of Chemical Reactor Engineering 20, no. 3 (2021): 295–303. http://dx.doi.org/10.1515/ijcre-2021-0077.

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Abstract Multiple purification of zinc sulfate solution is an important process for zinc hydrometallurgy, and large quantities of copper-cadmium residues are generated as byproducts in this process. Copper-cadmium residues contain a large number of valuable metals that must be recovered. A comprehensive extraction process has been proposed using sulfuric acid as the leaching reagent and hydrogen peroxide as the oxidizing reagent. The effects of acid concentration, leaching temperature, leaching time, liquid-to-solid ratio, hydrogen peroxide dosage and stirring speed on the leaching efficiency

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Pedrosa, Fátima, Marta Cabral, Fernanda Margarido, and Carlos A. Nogueira. "Recycling of Exhausted Batteries and EAF Dusts by Leaching with Several Aqueous Media." Materials Science Forum 730-732 (November 2012): 636–41. http://dx.doi.org/10.4028/www.scientific.net/msf.730-732.636.

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Zinc is a base metal present in several products of general use, and therefore found in numerous residues and end-of-life products. The two main sources of zinc containing wastes are spent Zn-MnO2 portable batteries and electric arc furnace (EAF) dusts from steelmaking plants. The recovery of metals from these residues by appropriate recycling processes is mandatory due to environmental, economic and resource conservation issues. Concerning the similar composition of both residues, their simultaneous processing can be envisaged. The research herein described consists on the hydrometallurgical

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Panayotova, Marinela, and Vladko Panayotov. "Studies on zinc recovery from technogenic waste." E3S Web of Conferences 295 (2021): 03008. http://dx.doi.org/10.1051/e3sconf/202129503008.

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Results from laboratory experiments are presented on extraction of zinc available in waste from lead-zinc metallurgy, mixed with lead-zinc flotation tailings and some waste rock, by leaching it under atmospheric conditions with sulfuric acid (H2SO4) solutions (5 and 10 wt. %) and 30 % hydrogen peroxide in the temperature range of 25 - 80 °C, at leaching time 30 - 120 min. Material leaching with 10 % H2SO4 solution at 70 °C for one hour brings into pregnant leach solution (PLS) around 80 % of zinc available. Imposing an electrochemical impact during the leaching process increases the quantity o

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42

Sanda, O., O. J. Ilesanmi, and E. A. Taiwo. "Recovery of manganese and zinc from spent zinc-carbon dry cells via sulphuric acid leaching using glucose as reductant." Nigerian Journal of Technology 42, no. 1 (2023): 136–43. http://dx.doi.org/10.4314/njt.v42i1.17.

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The recovery of manganese and zinc from spent zinc-carbon dry cells using sulphuric acid and glucose as the leaching medium and reducing agent respectively was studied to determine the optimum processing parameters for increasing the recovery of the manganese content. Leaching tests were done using the Response Surface Methodology with the process variables being leaching time, temperature, acid concentration and glucose dose. Regression equations were obtained from the experimental data for the extraction of manganese and zinc, and the main effects and interactions from the leaching studies w

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Mao, Ying Bo, Zhi Cong Wei, Jian Jun Fang, Shan Wang, and Tie Min Zhang. "Studying on Leaching Zinc Oxide Ore in the System of H₂SO₄." Advanced Materials Research 785-786 (September 2013): 1087–90. http://dx.doi.org/10.4028/www.scientific.net/amr.785-786.1087.

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Leaching test on the Oxidized Zinc Ore coming from Yunnan Province is studied in the H2SO4 system;Systematic studies are made to show the effects of various factors on the leaching rate of zinc. The optimum conditions for leaching is finally confirmed, namely the grinding size is 75% of-0.074mm, concentration of sulfuric acid 15%, temperature 60°C, solid to liquid ratio 3:1, and leaching time 2.5h. Ultimately, the leaching rate of Zn could reach more than 59%.

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Ma, Aiyuan, Xuemei Zheng, Lei Gao, Kangqiang Li, Mamdouh Omran, and Guo Chen. "Enhanced Leaching of Zinc from Zinc-Containing Metallurgical Residues via Microwave Calcium Activation Pretreatment." Metals 11, no. 12 (2021): 1922. http://dx.doi.org/10.3390/met11121922.

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Given the shortage of zinc resource, the low utilisation efficiency of secondary zinc resource, and the crucial problem that the synchronous dissolution of zinc from different mineral phases, an activation pretreatment method merged with calcium activation and microwave heating approach was proposed to enhance the zinc leaching from complex encapsulated zinc-containing metallurgical residues (ZMR). Results indicated that under the optimal pretreatment conditions, including microwave activation temperature of 400 °C, CaO addition of 25% and activation time of 20 min, the zinc leaching rate reac

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Yang, Chen, Qingxin Xu, Ruidong Xu, Xiaocai He, and Shengnan Lin. "New Technology of Zinc Oxide Concentrate Flotation + Mechanical Stirring Defoaming Zinc Leaching." Minerals 15, no. 3 (2025): 313. https://doi.org/10.3390/min15030313.

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During the acidic leaching of flotation zinc oxide concentrates, CO2 released from carbonate decomposition generates viscous foams that disrupt process stability. This study introduces an innovative synergistic defoaming process combining air flotation and mechanical methods. Fine air bubbles destabilize the foam, while mechanical defoaming enhances the removal of residual bubbles. The results indicate that the defoaming process combining air flotation with mechanical stirring effectively reduces foam generation during the acid leaching of zinc oxide concentrates, enhances leaching efficiency,

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Turan, Mehmet Deniz, Galymzhan Karamyrzayev, and Rashid Nadirov. "Recovery of zinc from copper smelter slag by sulfuric acid leaching in an aqueous and alcoholic environment." Chemical Bulletin of Kazakh National University, no. 4 (October 22, 2021): 4–11. http://dx.doi.org/10.15328/cb1244.

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The content of zinc in copper smelter slags obtained from pyrometallurgical copper production is comparable to the content of this metal in zinc ores. Therefore, these slags are considered a valuable secondary resource for zinc recovery. At the same time, the features of the mineralogical composition of the slag make the extraction of zinc from it very problematic. Most of the zinc is concentrated in the refractory zinc ferrite (ZnFe2O4). To avoid the formation of a viscous pulp when leaching copper smelter slag with an aqueous solution of sulfuric acid, in this work, the slag was leached with

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Xiao, Junhui, Kai Zou, Wei Ding, Yang Peng, and Tao Chen. "Extraction of Lead and Zinc from a Rotary Kiln Oxidizing Roasting Cinder." Metals 10, no. 4 (2020): 465. http://dx.doi.org/10.3390/met10040465.

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In this study, sulfuric acid leaching and gravity shaking-table separation by shaking a table are used to extract lead and zinc from a Pb-Zn oxidizing roasting cinder. The oxidizing roasting cinder—containing 16.9% Pb, 30.5% Zn, 10.3% Fe and 25.1% S—was obtained from a Pb-Zn sulfide ore in the Hanyuan area of China by a flotation-rotary kiln oxidizing roasting process. Anglesite and lead oxide were the main Pb-bearing minerals, while zinc sulfate, zinc oxide and zinc ferrite were the main Zn-bearing minerals. The results show that a part of lead contained in lead oxide is transformed to angles

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Jiang, Jia Chao, Xiao Yu Yang, and You Cai Zhao. "Recovery of Zinc from EAF Dust by Alkaline Extraction." Advanced Materials Research 113-116 (June 2010): 2299–304. http://dx.doi.org/10.4028/www.scientific.net/amr.113-116.2299.

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In this paper, a series of lab-scale experiments have been focused on the zinc recovery from electric arc furnace (EAF) dust by alkaline extraction, combining with the novel alkaline zinc electrowinning technology. Effects of several leaching variables, i.e. leaching time (1-3 h), NaOH concentration (150-400 g/L), solid/liquid ratio (S/L, 1/5-1/12), temperature (30-90 °C) and stirring speed (300-500 rpm) on zinc recovery (%) were investigated. Around 84 %Zn and 92 % Pb were respectively recovered when the leaching process was operated with 250 g/L NaOH and S/L 1/10 at 90 °C for 2 h. After Pb w

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Guerra, R. N. G., Carlos A. Nogueira, and Fernanda Margarido. "Leaching Studies of Spent Zinc-Manganese Alkaline Batteries with Sulphuric Acid." Materials Science Forum 587-588 (June 2008): 763–67. http://dx.doi.org/10.4028/www.scientific.net/msf.587-588.763.

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The hydrometallurgical processing of metal bearing residues is one of the established routes envisaging metals recovery. In these processes, the leaching operation plays a central role as allows the solubilization of metals for further separation and recovery as pure products. This route can be applied to spent domestic batteries recycling, which studies on sulphuric acid leaching of spent alkaline batteries are reported in this paper. Material samples used in the trials were prepared concerning the real proportion of the most common sizes and shapes of batteries found in the usual stream of t

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Yang, Li Jiao, Nan Chun Chen, Xia Ping Zhong, et al. "Factors on Leaching Zinc and Copper from Zinc Leach Residue." Key Engineering Materials 633 (November 2014): 169–72. http://dx.doi.org/10.4028/www.scientific.net/kem.633.169.

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It is found that cuprous sulfite, zinc sulfate and zinc sulfide were the main phases of copper and zinc in zinc leach residue, through analyzing its composition and phase characteristics by XRF and XRD. The method that cooperate sulfuric acid leaching with oxidant was chosen. 60 g/L H2SO4 at 60 °C for 2 h with 4% KMnO4 and liquid/solid ratio of 5..1, 84.29 % of Cu and 92.02 % of Zn are extracted. The ion concentration of copper and zinc are tested by UV-VIS spectrophotometer and EDTA titration respectively. The results show that the amount of acid is sufficient for leaching at the condition of

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