Parametric Parameters of the Shape of Electrocorundum Particles Obtained by Electrodispersing Waste Electrical Aluminum Grade AD0E

Purpose. Determination of parametric parameters of the shape of electrocorundum particles obtained by electrodispersing waste electrical aluminum grade AD0E in distilled water.

Methods. Electrodispersion (ED) of electrical aluminum waste of the AD0E brand was carried out in an oxygen-containing liquid (distilled water) on an installation patented by employees of the Powder Metallurgy and Coatings Scientific and Educational Center. 

The voltage at the electrodes, the pulse repetition frequency and the capacitance of the discharge capacitors were changed to vary the granulometric composition of the electrocorundum powder. The study of the parameters of the state of the surface of electrocorundum particles obtained under the conditions of electroerosion metallurgy of AD0E grade aluminum waste was carried out on a QUANTA 600 FEG scanning microscope. The elongation coefficient of electrocorundum particles was carried out on the Analysette 22 NanoTec device. 

Results. It has been experimentally established that electrocorundum particles obtained under the conditions of electroerosion metallurgy of aluminum waste of the AD0E grade in an oxygen-containing liquid have spherical and elliptical shapes with an average elongation coefficient of 1.25.

Giving the electrocorundum particles the shape of a sphere and an ellipse is facilitated by the conditions of powder formation of liquid metal droplets in the conditions of electroerosive metallurgy of AD0E grade aluminum metal waste, which are ejected from the electric discharge channel in molten form into a reactor filled with distilled water.

In the process of electroerosive metallurgy of aluminum metal waste, molten aluminum collide with each other, which is accompanied by the appearance of characteristic collision marks on their surface. In the event that the temperature difference of the colliding particles is not significant, then their agglomeration occurs.

Conclusion. In accordance with the goal aimed at determining the parametric parameters of the shape of electrocorundum particles obtained by electrodispersing waste electrical aluminum grade AD0E in distilled water, the high efficiency of the use of electroerosive metallurgy technology, which provides, at low energy costs, the production of new powder particles of electrocorundum with spherical and elliptical shape suitable for industrial use, is shown.

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