Vacuum purification device for high-purity aluminum

Abstract

The invention relates to the technical field of high-purity aluminum purification, and discloses a high-purity aluminum vacuum purification device which comprises a support and a crucible fixedly connected to the top of the support, a plurality of release grooves are formed in the circumference of the bottom of the crucible, a heating assembly is arranged on the periphery of the crucible, and a sealing cover is movably hinged to the top of the crucible. An extraction opening is formed in the upper end of the sealing cover, a locking ring is rotationally connected to the bottom of the sealing cover, a plurality of clamping grooves are formed in the periphery of the locking ring, and a plurality of clamping blocks distributed in a circumferential array mode are fixedly connected to the inner wall of the top of the crucible. After the sealing cover is automatically closed, the locking assembly can control uniform pressurization on all positions of the edge of the sealing cover, and sealing operation is rapid and reliable, so that the sealing performance is enhanced, the purification quality is improved, in addition, under the condition that the purification quality is not affected, the purification rate of high-purity aluminum is greatly increased, and the service life of the high-purity aluminum is prolonged. Uniform cooling of the aluminum ingot from the core part to the outer wall is achieved, and the stability of directional crystallization is guaranteed.