Engineering:Electromagnetic vortex intensifier with ferromagnetic particles

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Electromagnetic vortex intensifier with ferromagnetic particles (vortex layer devise, electromagnetic mill) consists of an operating chamber (pipeline) with a diameter of 60–330 mm, located inside an inductor with a rotating electromagnetic field.[1] The operating chamber contains cylindrical ferromagnetic particles 0.5–5 mm in diameter and 5–60 mm in length, ranging from tens to several thousand pieces (0.05–20 kg), depending on the dimensions of the operating chamber of the intensifier.[2]

History of electromagnetic vortex intensification

Electromagnetic devices with a vortex layer were proposed in 1967 by D.D. Logvinenko and O.P. Shelyakov.[1] The monograph "Intensification of technological processes on devices with a vortex layer", written by these authors, showed the effective use of these devices in:

  • mixing of liquids and gases;[3]
  • mixing of loose materials;[4]
  • dry grinding of solids (micro-resin);[5]
  • grinding and dispersion of solids in liquid media;
  • activation of substance surface;[3]
  • implementation of chemical reactions;
  • changes in the physical and chemical properties of substances.

Following this research, these intensifiers found their application in many researches and developments.

Physical processes in electromagnetic vortex intensifiers

Intensification of technological processes and chemical reactions is achieved due to intensive mixing and dispersion, acoustic and electromagnetic treatment, high local pressure and electrolysis of processed components. Electromagnetic devices with a vortex layer with ferromagnetic elements accelerate the reactions 1.5-2 times; reduce the consumption of reagents and electricity by 20%.[6] The grinding effect is achieved by the motion of ferromagnetic particles and their free collision with each other, and a constrained collision between the particles and a body. The degree of grinding is 0.5 μm (with an initial size of 20 mm). At present, the electromagnetic devices with a vortex layer with ferromagnetic elements actually exist (D.D. Logvinenko himself designed and produced more than 2000 pieces), their principle is also implemented in some technological lines.

Industrial application of electromagnetic vortex intensifiers

Examples of industrial applications of these devices for intensifying processes are:

  • preparation of food emulsions;
  • preparation of multicomponent suspensions with vulcanizing and gelling agents (sulfur, zinc oxide, soot, kaolin, sodium silicofluoride) in latex sponge production; Obtaining suspensions of titanium dioxide used as matting agent for chemical fibers;
  • wastewater treatment from acids, alkalis, hexavalent chromium compounds, nickel, iron, zinc, copper, cadmium, other heavy metals, cyanide compounds and other contaminants;[7][8]
  • production of greases and emulsols;
  • drilling fluid preparation;[9]
  • preparation of kerosene in water emulsions, silicone rubber latex, etc.

Electromagnetic vortex intensifier grinds and regrinds coal,[10] alumina-containing slag, quartz sand, technical diamonds, cellulose, chalk, wood flour, fluoroplastics, etc. Also, it can be used for decontamination of agricultural animal waste.

References

  1. 1.0 1.1 Logvinenko D.D., Shelyakov O.P., 1976: Intensification of technological processes on devices with a vortex layer. – Kiev: “Technika”, 144 p. (in Russian).
  2. Process intensifier AVS-100. Electromagnetic Mill.
  3. 3.0 3.1 S. Styła (2017). Laboratory studies of an electromagnetic mill inductor with a power source. Econtexhmod. An International Quarterly Journal. Volume 06, No. 2. pp. 109-114.
  4. Patent US3869251. Apparatus for intermixing materials in a reaction vessel containing ferromagnetic particles.
  5. M. Wołosiewicz-Głąb, S. Ogonowski, D. Foszcz (September 2016). Construction of the electromagnetic mill with the grinding system, classification of crushed minerals and the control system. 17th IFAC Symposium on Control, Optimization and Automation in Mining, Mineral and Metal Processing MMM 2016 Vienna. Volume 49, Issue 20. p. 256.
  6. Oberemok V.M., Nikitenko M.I., 2012: Electromagnetic apparatus with feromagnetic elements. Intensification of technological processes in industrial wastewater treatment. – Poltava: PUET, 318 p. (in Ukrainian).
  7. Decontamination of oily wastewater using electromagnetic vortex layer devices. (in English)
  8. Improving efficiency of electroplating wastewater treatment. (in English)
  9. Improving the Efficiency of Drilling Fluid Preparation with Vortex Layer Devices. (in English)
  10. T. Micorek , M. Rejdak, J. Robak, G. Różycki (2016). Badania mikronizacji węgla kamiennego w młynie elektromagnetycznym. Piece Przemysłowe & Kotły. Tom 4. pp. 27-33. (in Polish)

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