Statistical and Fourier analysis of the vortex dynamics of fluids in an external magnetic field

Derecha, Dmytro O.; Skirta, Yury B.; Gerasimchuk, I. V.; Hruzevych, Andrii V.

doi:10.1016/j.jelechem.2020.114399

Cited by 3 publications

(1 citation statement)

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“…It should be noted that in addition to magnetite, the sediment, which is obtained by activating the mixture with the amplitude of magnetic induction in the range from 0.02 to 0.06 Tl, contains an intermediate solid phase product of the ferritization reaction -iron monohydrate δ -FeOОН. This phase is less stable than Fe 3 O 4 but also has magnetic properties [23]. The results of our studies also demonstrate that an increase in the amplitude of magnetic induction to 0.1 Tl leads to the formation of a crystalline structure of the sediment, which contains only one phase -magnetite Fe 3 O 4 .…”

Section: Discussion Of Results Of Processing Spent Etching Solutions ...mentioning

confidence: 56%

Determining the rational parameters for processing spent etching solutions by ferritization using alternating magnetic fields

Kochetov

Samchenko

Lastivka

et al. 2022

EEJET

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This paper reports the results of studying the application of a ferritization method for the integrated purification of used etching solutions. A feature of this work is the use of energy-saving activation of the process by alternating magnetic fields. Its advantages are shown in comparison with traditional thermal activation. The influence of magnetic induction amplitude and key technological parameters of ferritization on the quality of cleaning an etching solution has been studied. The qualitative and quantitative composition of sediments obtained after the ferritization of etching solutions was investigated. Used etching solutions are large-tonnage waste of industrial enterprises. They contain harmful pollutants that have a detrimental effect on the environment. It is promising to treat these solutions in order to obtain valuable commodity products. It is established that with an optimal value of magnetic induction amplitude of 0.1 Tl, the degree of extraction of iron ions from the solution reaches a value of 99.99 %. The best values for the main technological parameters of the process have been determined: the concentration of iron ions in the reaction mixture is 6.6 g/dm3; pH, 11.5; the duration of ferritization is 15 min. The residual concentration of iron ions in purified solutions does not exceed 0.3 mg/dm3. Thus, according to the norms of current standards, they can be reused in production. Comparative analysis indicates the advantages of electromagnetic activation of the reaction mixture. The phases of magnetite Fe3O4 and iron monohydrate δ ‒ FeOОН were detected by the method of X-ray phase analysis in ferritization sediments. It is established that with an amplitude of 0.1 Tl, the sediment contains only magnetite. The study's results indicate the possibility of further use of sediments for the manufacture of important ferromagnetic substances. The application of the improved ferritization process in production will achieve less energy consumption compared to well-known processing technologies

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Section: Discussion Of Results Of Processing Spent Etching Solutions ...mentioning

confidence: 56%