Halide Extraction Processes

Vignes, Alexis

doi:10.1002/9781118616932.ch3

Cited by 2 publications

(2 citation statements)

References 20 publications

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“…The agitation leaching process is one of the stages which is used in the industrial hydrometallurgy of Ni, Co, Cu, Fe-Ti, Zn; therefore, still additional investigations for better process cognition are required [ 28 , 29 ]. Figure 1 a presents a test stand for analysis of fluid–solid system hydrodynamics, which consisted of a heating station with a thermostat, an overhead propeller with rotations control (R50D type, CAT M. Zipperer GmbH, Ballrechten-Dottingen, Germany), a camera, an optical system leading a laser beam, a laser, and a computer with a controlling-recording system.…”

Section: Testing Objects and Methodologymentioning

confidence: 99%

Particle Image Velocimetry Method for Prediction Hydrodynamic Conditions during Leaching Process on the Basis of Sn–NaOH System

Cwudziński

Gajda

2021

Materials

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In leaching processes controlled by diffusion and convectional transport of mass, the hydrodynamic structure formed in the reactor’s working volume is an additional factor affecting the process. This research work presents results related to hydrodynamic structures developing in batch reactors, different in shape, recorded by means of the particle image velocimetry (PIV) method. The movement of the distilled water and leaching solution was analyzed during investigations. Next, the system hydrodynamics and the process of tin leaching were analyzed. Finally, the leaching is affected by the reactor geometry and the hydrodynamic structure developed in its working volume, especially when a convectional or diffusion mass transport decides the process efficiency.

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Section: Testing Objects and Methodologymentioning

confidence: 99%

Particle Image Velocimetry Method for Prediction Hydrodynamic Conditions during Leaching Process on the Basis of Sn–NaOH System

Cwudziński

Gajda

2021

Materials

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“…Currently, the most widely used method is the leaching of the residue by strong hot sulfuric acid with following precipitation of iron in the form of jarosite [ 7 ]. Other industrial methods are the same leaching with the precipitation of iron as goethite or hematite [ 8 ], as well as the pyrometallurgical processing of the ferrite residue by the Waelz process [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Study on the Mechanism of Sulfating Roasting of Zinc Plant Residue with Iron Sulfates

et al. 2021

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Zinc plant residue (ZPR) is a secondary material generated during hydrometallurgical zinc production that contains considerable contents of valuable elements such as Zn, Cu, Fe, Pb, Cd, Ag, In, Ga, Tl. Zinc, copper and accompanying elements in ZPR are in different minerals, mainly in the ferrites. A promising approach for recycling ZPR is the sulfating roasting using iron sulfates followed by water leaching. In this study, the composition of ZPR and the obtained products were thoroughly investigated by various methods including X-ray diffraction analysis (XRD), chemical phase analysis and Mössbauer spectroscopy. The effect of temperature, amount of iron sulfates and roasting time on the conversion of valuable metals into a water-soluble form was thermodynamically and experimentally studied both using pure ferrites and ZPR. Based on the results of time-resolved XRD analysis and synchronous thermal analysis (STA), a mechanism of the sulfation roasting was elucidated. The rate-controlling step of zinc and copper sulfation process during the ZPR roasting was estimated. The sulfating roasting at 600 °C during 180 min with the optimal Fe2(SO4)3∙9H2O addition followed by water leaching enables to recover 99% Zn and 80.3% Cu, while Fe, Pb, Ag, In, Ga retained almost fully in the residue.

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Halide Extraction Processes

Cited by 2 publications

References 20 publications

Particle Image Velocimetry Method for Prediction Hydrodynamic Conditions during Leaching Process on the Basis of Sn–NaOH System

Particle Image Velocimetry Method for Prediction Hydrodynamic Conditions during Leaching Process on the Basis of Sn–NaOH System

Comprehensive Study on the Mechanism of Sulfating Roasting of Zinc Plant Residue with Iron Sulfates

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