ISSN (print) 1995-2732
ISSN (online) 2412-9003


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DOI: 10.18503/1995-2732-2020-18-2-47-55


Problem Statement: Ferrofluid used to obtain products suitable for ingot melting of doré bars addresses a currently important task for small mining enterprises - the production of marketable commercial products, as this provides increased economic efficiency of the enterprise. Objectives: Development of a technology for mass synthesis of ferrofluid that is stable in strong inhomogeneous magnetic fields by applying new technological approaches to two problems - obtaining nanosized particles of magnetite and ensuring aggregative stability of non-aqueous colloidal solutions prepared on their basis in gold extraction by magnetogravimetric separation. Originality: The authors substantiated and identified efficiency of mass production of magnetite nanoparticles by a heterogeneous chemical condensation method characterized in that they first obtain stable condensation centers of a supramolecular size (seeds), and then ensure their growth up to the required nanoscale. Applying the principles of the theory of polymolecular adsorption, the authors proved stabilization efficiency, when chemically and physically sorbed stabilizer layers are created on the surface of magnetite nanoparticles, and then the second layer is transferred to the unprotected surface of magnetite nanoparticles. Findings: The authors developed a magnetic fluid mass synthesis process: magnetite nanoparticles were produced by a heterogeneous chemical condensation, and the system was stabilized by mixing magnetite nanoparticles protected and unprotected by the stabilizer. The quality of ferrofluid produced by this technology meets the requirements of magnetogravimetric separation of materials by density. Practical Relevance: The developed technology provides a reduction in capital costs and operating costs for the synthesis of ferrofluid.


Nanomagnetite, synthesis, stabilization, ferrofluid, separation, gold.

For citation

Evdokimov S.I., Gerasimenko T.E. Theory and Practice of Preparing and Applying Ferrofluid. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2020, vol. 18, no. 2, pp. 47–55.

Sergey I. Evdokimov – PhD (Eng.), Associate Professor

North Caucasian Institute of Mining and Metallurgy (State Technological University), Vladikavkaz, Russia

Tatiana E. Gerasimenko – PhD (Eng.), Head of the Intellectual Property Department

North Caucasian Institute of Mining and Metallurgy (State Technological University), Vladikavkaz, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

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