FIELD: technological processes.
SUBSTANCE: invention relates to a method of cleaning aluminum and its alloys from intermetallides and non-metallic inclusions. Method involves overheating of molten aluminum or its alloy after melting to temperature of 750–800 °C and pouring it into a rotary mold pre-unwound until gravitation coefficient equal to 170–200 is achieved near the outer wall of the rotating mold. During mold rotation, heat is removed from mold outer wall in direction of its rotation axis with average cooling rate of 0.02–0.1 °C/s for movement of intermetallides and nonmetallic inclusions by pressure of flat crystallization front towards rotation axis of casting mold at cooling of melt in same direction. When the casting temperature is lower than the solidus temperature, the cast is cooled and the size of the central part of the casting occupied by displaced intermetallides and non-metallic inclusions is determined, and this central part of the cast is removed.
EFFECT: provides an increase in the degree of purification.
1 cl, 3 dwg
