High-purity aluminum continuous purifying device

Abstract

The invention provides a high-purity aluminum continuous purifying device which purifies molten aluminum by utilizing a hydrocyclone structure consisting of a crucible, a crucible cover and a crystallizer. On the one hand, due to normal segregation, pure aluminum crystals are obtained on a solid-liquid interface in the crystallizer and impurities are diffused to molten aluminum from the solid-liquid interface, so that density of adjacent molten aluminum is enlarged due to increase of content of the impurities, and on the other hand, due to gravity segregation under the centrifugal effect, the molten aluminum with high content of the impurities is centrifugalized to the crucible wall and gradually moves to a bottom flow port, and the molten aluminum with low content of the impurities is extruded to the solid-liquid interface due to small density. Under the effect of normal segregation and gravity segregation, the purifying efficiency is greatly improved. The device provided by the invention can produce continuously, is energy-saving and efficient, simple in structure and safe and reliable, and can be combined to use through various modes.

Description

technical field [0001] The invention belongs to the technical field of metal aluminum purification, and specifically relates to a high-purity aluminum continuous purification device, in particular to a 5N or 6N high-purity aluminum segregation continuous purification device. Background technique [0002] Macro-segregation, also known as "regional segregation", refers to the phenomenon of uneven chemical composition in each macro-region in metal ingots (castings), including normal segregation, abnormal segregation and specific gravity segregation. [0003] As a common separation and classification equipment, the cyclone works on the principle of centrifugal sedimentation. The upper part is a hollow cylinder, and the lower part is an inverted cone connected to the cylinder. When the two-phase (or multi-phase) mixture to be separated enters the cyclone tangentially from the periphery of the cyclone at a certain pressure, a strong The three-dimensional elliptical strong rotatio...

AI Technical Summary

Problems solved by technology

This technology is easy to operate and has high control precision, but its disadvantages are: 1. The aluminum liquid with high inclusion content near the solid-liquid interface is stirred into the entire aluminum liquid, polluting the aluminum liquid with low inclusion content; Diffusion of inclusion elements. In order to prevent the aluminum liquid from oxidizing and absorbing hydrogen during the stirring process, vacuum treatment is required.

This method can be continuously purified, easy to operate, and low in energy consumption, but its disadvantages are: 1. Under the action of gravity, the degree of specific gravity segregation is low, and the purification efficiency is low, and as the purity of the metal increases, the purification efficiency will become lower and lower; 2. Due to the purification at the crystallization temperature, the temperature control requirements are high, and it is easy to solidify and cause serious consequences such as blockage of pipelines.

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