Investigation of the Physical Properties of Electroerosive Molybdenum Powder, Obtained in an Aqueous Medium

The purpose of this study was to obtain molybdenum powder by processing molybdenum waste by electroerosive dispersion in distilled water, as well as to study the morphology and granulometric particle size of the resulting  powder.

Methods. Molybdenum waste was processed into powder at an experimental electroerosive dispersion plant (RF Patent № 2449859) in distilled water. The morphology and granulometric particle size of the obtained electroerosive molybdenum powder were studied using modern equipment and complementary methods of physical materials science: grain composition and results of dispersion analysis of average particle size (laser particle size analyzer Analysette 22 NanoTec); the shape and condition of the particle surface (scanning electron microscope (SEM) Quanta 200 FEG).

The results of the study of the physical properties of the powder material obtained at the experimental facility by electrodispersion of molybdenum waste in an aqueous medium indicate the high efficiency and cost-effectiveness of the electrodispersion technology, which ensures the production of molybdenum powder with a spherical particle shape, which is not inferior in its characteristics to industrially used powders. The following characteristics of molybdenum powder obtained by electrodispersing molybdenum waste have been experimentally established: the shape of molybdenum electroerosion powder particles is spherical, small particles of molybdenum powder form agglomerates; the particle sizes of molybdenum powder are from 0,25 to 100 microns; the average volumetric diameter is 38 microns; the specific surface area is 0,09 m2/g.

Conclusion. The conducted studies on the production of molybdenum powder from molybdenum waste by electroerosive dispersion will allow for the reuse in various industries of such an expensive and difficult-to-extract metal as molybdenum.

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