高纯铝的精炼工艺及生产现状

Refining Processes and Current Production Status of High-purity Aluminum

摘要

高纯铝是半导体靶材、电子阳极箔、航空航天器件的核心基础金属材料，纯度等级分为4N、5N及5N5以上超高纯铝。本文系统梳理熔剂净化、氩气吹炼等主流精炼工艺的除杂机理、工艺参数与适用纯度区间，依托行业统计数据剖析国内高纯铝区域产能、品控水平等工业化生产现状，指出行业存在高端纯度产品产能不足、全流程杂质管控缺失等突出问题。结合冶金工程现场生产经验，从复合熔剂体系优化、杂质闭环管控等维度提出提质降耗优化路径，可为国内高纯铝冶炼企业工艺升级、降本增效提供工程实践参考。

Abstract

High-purity aluminum serves as a fundamental metal material for semiconductor targets, electronic anode foils, and aerospace components, with purity grades ranging from 4N to ultra-high purity levels of 5N and above. This paper systematically examines the impurity removal mechanisms, process parameters, and applicable purity ranges of mainstream refining techniques such as flux purification and argon blowing. Based on industry statistics, it analyzes the current state of industrial production in China regarding regional capacity and quality control standards for high-purity aluminum, identifying key challenges including insufficient production capacity for high-purity products and inadequate impurity control throughout the entire production process. Drawing on practical experience from metallurgical engineering, the study proposes optimization strategies—including improvements to composite flux systems and closed-loop impurity management—to enhance product quality and reduce costs, providing actionable insights for process upgrades and cost-efficiency improvements in domestic high-purity aluminum smelting enterprises.

关键词

高纯铝 / 精炼工艺 / 三层液电解

Key words

high-purity aluminum / refining process / three-layer liquid electrolysis

参考文献

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