Modification Transformations of Saponite-Containing Material During Mechanical Grinding

The saponite-containing material isolated from a suspension of recycled water of the enrichment process of kimberlite ores of the Arkhangelsk diamond province can be considered as a promising raw material for the production of magnesia cement. In this regard, an important stage in the chain of modification transformations of saponite is the transformation of its three-layer crystal lattice into a two-layer one, characteristic of serpentine. In this case, this process proceeds with mechanical grinding of the saponite-containing material. In order to confirm this fact, the analog value of the Hamaker constant calculated on the basis of experimental data was used. It has been established that with an increase in the duration of mechanical dispersion of experimental samples of saponite, this constant approaches the values characteristic of serpentine, and with a grinding time of 60 min, the values of the analog values of the Hamaker constants of serpentine and mechanically modified saponite differ only by 9%. The studies were carried out on pressed samples of powders of saponite-containing material and serpentine. To determine the analog value of the Hamaker constant of the surface of pressed samples, the method of G.A. Zisman, based on determining the contact angle of the surface of the analyzed samples formed by working fluids with a known value of surface tension was used. Aqueous ethanol solutions were used as working fluids.

A.M. AYZENSHTADT, Doctor of Sciences (Chemistry) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
M.A. FROLOVA, Candidate of Sciences (Chemistry) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
V.E. DANILOV, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
T.A. DROZDYUK, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
M.A. MALYGINA, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Northern (Arctic) Federal University (NAFU) named after M.V. Lomonosov (22, Severnaya Dvina Embankment, Arkhangelsk, 163002, Russian Federation)

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