METHOD OF MANUFACTURING MICROBALLS AND MICROSPHERES Russian patent published in 2014 - IPC C03B19/10 B82B3/00 

FIELD: chemistry.

SUBSTANCE: nanoparticles of carbonyl iron, as such used are magnetite particles with size from 5.0 to 10.0 nanometers, covered with surface-active substance, as such used is oleic acid, are introduced into kerosene. After that, kerosene with nanoparticles of carbonyl iron is sprayed through sprayer in 20-30 mcm drops into chamber with three-phase electric winding, creating spiral rotating magnetic field. Glass powder, which is caught by kerosene drops rotating in magnetic field, is supplied into the same chamber by compressed air. After that, it is supplied into first zone of low intensity of microwave oven, where particles of carbonyl iron are heated to 700-800°C, and as a result kerosene is decomposed and nanoparticles of carbonyl iron precipitate on the surface of glass powder particles. As particles of glass powder with nanoparticles of carbonyl iron continue moving, temperature of nanoparticles increases to 1300-1350°C. Glass melts and under action of molecular forces moves throughout the entire volume and forms microballs, which later are cooled, nanoparticles of carbonyl iron are restored and attracted to poles of permanent magnet.

EFFECT: improving efficiency and safety.

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