Nanoscale particles in technological processes of beneficiation.
BACKGROUND
Cavitation is a rather common and important effect in the processes of destruction of nano- and microscale particles in natural and technological processes. A possible cavitation disintegration of polymineral nano- and microparticles, which are placed into a liquid, as a result of the interaction of the particles with collapsed cavitation bubbles is considered. The emphasis is put on the cavitation processes on the interface between liquid and fine solid particles, which is suitable for the description of the real situations.


RESULTS
The results are illustrated for the minerals that are most abundant in gold ore. The bubbles are generated by shock loading of the liquid heated to the boiling temperature. Possibilities of cavitation separation of nano- and microscale monomineral fractions from polymineral nano- and microparticles and of the use of cavitation for beneficiation are demonstrated.


CONCLUSIONS
The cavitation disintegration mechanism is important because the availability of high-grade deposits in the process of mining and production of noble metals is decreasing. This demands for an enhancement of the efficiency in developing low-grade deposits and in reprocessing ore dumps and tailings, which contain a certain amount of noble metals in the form of finely disseminated fractions. The cavitation processes occuring on the interface between liquid and fine solid particles are occasionally more effective than the bulk cavitation processes that were considered earlier.
Institute for Dynamics of Geospheres of the Russian Academy of Sciences, Leninsky pr. 38, bldg. 1, 119334 Moscow, Russia ; Moscow Institute of Physics & Technology, 141700 Dolgoprudny, Moscow region, Russia.
Sergey I
SI
Popel
Institute for Dynamics of Geospheres of the Russian Academy of Sciences, Leninsky pr. 38, bldg. 1, 119334 Moscow, Russia ; Moscow Institute of Physics & Technology, 141700 Dolgoprudny, Moscow region, Russia.
Vitaly V
VV
Adushkin
Institute for Dynamics of Geospheres of the Russian Academy of Sciences, Leninsky pr. 38, bldg. 1, 119334 Moscow, Russia.
Anatoly P
AP
Golub'
cavitation disintegration; gold ore; nano- and microparticles; polymineral and monomineral fractions