Leaching of Non-Ferrous Metals from Galvanic Sludges

Makovskaya, Olga Yu.; Kostromin, K. S.

doi:10.4028/www.scientific.net/msf.946.591

Cited by 14 publications

(7 citation statements)

References 19 publications

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“…It reduces the costs of prospecting and exploring new deposits, frees up wasteland, and eliminates sources of environmental pollution. The study results of the development trends of the mineral resource base coincide with the results of studies of experts [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34].…”

Section: Resultssupporting

confidence: 71%

Mathematical modeling of processes of technogenic deposits development

Голик¹,

Morkun²,

Morkun³

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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The article aims to substantiate the tendency to solve the problem of the mineral and raw material base of non-ferrous metals due to the involvement of technogenic origin in substandard metal-containing raw materials. Critical analysis and systematization of new information on the current state of the mineral and raw materials base of non-ferrous metals and the environmental problems of mining associated with it. New data on the recovery and loss of metals in the process of ore dressing are presented. It is shown that the total value of metals in waste is comparable to the value of potential mineral resources in the bowels. The problems of the use of mining waste should be solved in a single package with environmental problems by creating a single technological cycle for the extraction and processing of industrial minerals of industrial waste, the use of which can make the development of industrial deposits economically viable. The practical significance of the work lies in the possibility of using best practices for non-ferrous metallurgy enterprises that are searching for ways to survive in the conditions of the establishment of market relations.

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Section: Resultssupporting

confidence: 71%

Mathematical modeling of processes of technogenic deposits development

Голик¹,

Morkun²,

Morkun³

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…However, no thorough analysis was carried out regarding the sanitary and chemical safety of both products with additives of galvanic sludge and the technology of their production, which is important for industrial implementation [10]. One of the known ways to effectively process and neutralize pasty galvanic sludge is to extract toxic and valuable heavy metals from it when transferring them to the liquid phase [11]. To this end, it is advisable to dissolve galvanic sludge in sulfuric acid, followed by the extraction of heavy metal ions from it [12].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determination of influence of pH on reaction mixture of ferritation process with electromagnetic pulse activation on the processing of galvanic sludge

Kochetov

Samchenko

Arhatenko

2021

EEJET

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This paper considers prospects for increasing the level of environmental safety of industrial enterprises as a result of the implementation of resource-saving technology of processing galvanic sludge using the ferritization method. The effectiveness of the use of electromagnetic pulse discharges for resource-saving activation of the ferritization process with the extraction of heavy metal ions from sludge (Fe, Ni, Cu, Zn) has been confirmed. The influence of key parameters of the process such as the pH value of the reaction mixture and the initial concentrations of metals in the solution on the quality of processing galvanic sludge by ferritization has been experimentally investigated. It was determined that with an increase in the pH value from 8.5 to 10.5 the residual concentrations of metal ions decrease to the values of 0.1÷0.25 mg/dm3 regardless of the total initial concentrations. It has been established that the technique of electromagnetic pulse activation ensures an adequate degree of extraction of metal ions of 99.9 %; it also has indisputable energy advantages compared to the thermal method: energy costs are reduced by more than 60 %. That indicates the suitability of purified water for reuse in galvanic production in terms of the requirements for the content of heavy metal ions in it. In addition, the structural studies of ferritization sediment samples have been carried out. The sediment is characterized by the maximum content of crystalline ferromagnetic phases of ferrite. It was established that an increase in the pH of the initial reaction mixture leads to an increase in the ferrite phase in sedimentation: at pH=10.5, phases were detected, which are characterized by a maximum ferrite content (exceeding 76 %). The proposed resource-saving ferritization process prevents environmental pollution, ensures efficient and rational utilization of raw materials and energy in the industry; it also makes it possible to obtain commodity products from industrial waste.

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“…The sludge is mixed with sand due to the conditions of its placement in the sludge storage. Ammonia leaching of the initial sludge was carried out at pH 8-9, temperature 25 ∘ C, sludge mass 20 g, the volume of the solution 150 cm 3 , the duration of the process Sulphuric acid has proved to be one of the best reagents from previously tested solvents [6,7]. Therefore, subsequent leaching experiments were carried out using sulfuric acid.…”

Section: Methodsmentioning

confidence: 99%

Hydrometallurgical Technology for Processing of Galvanic Sludges

Makovskaya

Kostromin

2020

Kms

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The problem of processing galvanic sludges, formed as a result of neutralization of technological solutions and wastewater containing heavy non-ferrous metals is considered in this study. At present, sludges are transported to disposal area and are not used in any way. Typically, such sludges contain significant amounts of chromium and nickel, which creates environmental hazard. Investigated sludge contains up to 6,6% Ni and up to 7,4% Cr. The hydrometallurgical process to treatment of these sludges is carried out. Solutions of sulfuric acid and ammonia were used as lixiviants. It is shown that when using a solution of sulfuric acid with pH=1,5, extraction of up to 93,3% Cu, 70,2 Ni, 90,3 Zn is achieved. For selective nickel recovery sorption concentration by Lewatit TP207 is proposed. Keywords: Galvanic sludge, hydrometallurgy leaching, nickel, ion-exchange resin

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Leaching of Non-Ferrous Metals from Galvanic Sludges

Cited by 14 publications

References 19 publications

Mathematical modeling of processes of technogenic deposits development

Mathematical modeling of processes of technogenic deposits development

Determination of influence of pH on reaction mixture of ferritation process with electromagnetic pulse activation on the processing of galvanic sludge

Hydrometallurgical Technology for Processing of Galvanic Sludges

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