FIELD: metallurgy.
SUBSTANCE: method for obtaining porous non-adhesive coating formed from silicon carbide particles at least partially coated with nanometric layer of silicon dioxide on the surface of the melting pot inner walls involves at least the following stages: obtaining liquid medium containing at least one dispersion of silicon carbide particles, deposition of the above medium on surface of internal walls of the treated melting pot for obtaining a film during drying of applied composition, which is formed at least from silicon carbide particles, and heat treatment at the temperature in the range of 500°C to 1050°C in oxidising medium during 1 to 5 hours.
EFFECT: when contacting liquid silicon, obtained porous coating has sufficient mechanical strength and prevents sticking of the hardened substance to the melting pot.
13 cl, 2 ex
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