High-purity aluminum purification device based on segregation method

Abstract

A high-purity aluminum purification device based on segregation method belongs to metal purification technical field and comprises an internal heater, a plurality of electromagnetic stirrers and a purification furnace body. The internal heater is positioned at the center of the purification furnace body and the electromagnetic stirrers are positioned at the periphery of the furnace body and distributed evenly. The invention controls the melt flow field to improve the diffusion and distribution of the impurity elements discharged during the segregation process of the aluminum melt, accordingly accelerates the mixed diffusion of solute elements in the melt, reduces the frontal impurity concentration of the solid-liquid interface and realizes the purpose of improving the aluminum purification efficiency.

Description

technical field [0001] The invention relates to a device in the technical field of smelting, in particular to a high-purity aluminum purification device based on a segregation method. Background technique [0002] In terms of the evolution of high-purity aluminum purification, the segregation method has lower energy consumption, less environmental pollution and high efficiency than the commonly used three-layer electrolytic refining technology, and has become one of the main methods for the purification of high-purity aluminum. At present, there are several kinds of processes for industrial application, but their process characteristics and technical levels are not the same, and the carrier-equipment of their processes are also various. [0003] After searching the literature of the prior art, it was found that Chinese patent application No. 96204334.6 recorded a "directional crystallization furnace for the production of refined aluminum". The composite layer is easy to dis...

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Problems solved by technology

This structural design is the basic form of directional solidification segregation purification, and there are the following problems: 1. The crystallization method is directional dendrite growth, which is not conducive to the diffusion of impurity elements; 2. Although the materials of the furnace wall and the furnace bottom are not wet with aluminum, they are There is also the diffusion of impurity elements into the aluminum liquid, which limits the purification efficiency of this structure; 3. The coexistence of solid phase and liquid phase, under the action of stirring, is not conducive to the accumulation of impurity elements at the end

[0004] Further searches found that Chinese patent application No. 03230414 recorded a "segregation refined aluminum production device". Cooling effect and crystallization temperature are used to improve the purification efficiency, but the crystal growth rate in the solidification process is not easy to control, and the device is relatively complicated, so the technical requirements for the entire production process to achieve good purification efficiency are relatively high

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