Sustainable approach for galvanic waste processing by energy-saving ferritization with AC-magnetic field activation

Samchenko, Dmitry; Kochetov, Gennadii; Derecha, Dmytro O.; Skyrta, Oleh

doi:10.1080/23311916.2022.2143072

Cited by 4 publications

(2 citation statements)

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“…Pack generation is provided by a program on a personal computer. In research paper [28], rational parameters for carrying out AMF activation were determined: the amplitude of the magnetic induction was 0.1 Tl, the pulse frequency was 1 Hz, the period between pulses was 100 ms, and the pulse duration was 1000 ms. These parameters were used in this study.…”

Section: Experimental Setmentioning

confidence: 99%

“…The disadvantages of traditional ferritization are its temperature requirements-temperatures above 75 • C. In research paper [27], it was shown that an alternative to thermal ferritization is the activation of the reaction mixture with alternating magnetic fields (AMF) at ambient temperatures. Using this activation method, in research paper [28], iron-containing ferromagnetic compounds of various phase compositions were obtained from liquid industrial waste, the structure of which contains nickel, zinc, and copper ions.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Technological Factors on the Formation and Transformation of Iron-Containing Phases in the Process of Ferritization of Exhausted Etching Solutions

Samchenko,

Kochetov,

Trach

et al. 2024

Water

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Every year, metallurgical enterprises generate a massive amount of toxic exhausted high-concentration etching solutions. Application of the ferritization process to recycle exhausted etching solutions can help to prevent environmental pollution. It enables a cost-efficient use of water at an industrial plant and allows the plant to obtain products from toxic industrial waste and utilize it. The aim of the study was to analyze the qualitative and quantitative composition of the formed sediment and its grain size composition. Variable study parameters were the initial pH values of the solutions, the initial concentrations of total iron, and the duration of the aeration process of the reaction mixture. Thermal activation and alternating magnetic fields were used to activate the ferritization. The XRD showed that the formed sediments contained phases of γ-FeOOH, δ-FeOOH, Fe3O4, and γ-Fe2O3. Granulometry analysis showed that these sediments were highly dispersed and heterogeneous. Chemically stable phases of magnetite were obtained in the composition of sediments, with an initial concentration of iron in the reaction mixture of 16.6 g/dm3, a pH of 11.5, and a process duration of 15 min. The study results demonstrated the feasibility of further study and possible use of such sediments with a high magnetite content for the production of materials with ferromagnetic and sorption properties.

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Section: Experimental Setmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%