Core Insights - The article discusses China's breakthrough in producing high-purity iron, specifically 5N-grade ultra-pure iron, which has historically been dominated by Japanese and American companies [1][2] - The Chinese team, led by Hebei Longfengshan Group and Shanghai University, developed a new production method that significantly reduces costs and increases supply stability [2][3] Group 1: Production Process - The Chinese team utilized local high-purity pig iron as raw material, avoiding the high costs associated with traditional methods used by Japan and the U.S. [2] - They established the Iron-Based New Materials Research Institute in 2020 and launched a project to achieve 4N-grade purity, with the first production line achieving an annual capacity of 80,000 tons [2][3] - By September 2023, the team successfully produced the first batch of 5N samples with a purity of 99.999% [2] Group 2: Market Impact - By June 2024, the purity reached 99.9992%, surpassing Japanese and American standards, leading to a significant influx of orders from global buyers [3] - The price of the new high-purity iron dropped to one-fifth of the original price, prompting Japanese companies to cut their prices to one-third in response [3][5] - The shift in market dynamics has positioned China as a new supplier, reducing the market share of Japanese and American firms [5] Group 3: Technological Advancements - The production process involves a three-step method: pyrometallurgical pre-treatment, electrolytic refining, and vacuum zone melting, utilizing self-developed ultra-high vacuum furnaces [2][3] - The team has filed 42 patents to protect their innovations and ensure competitive advantage [5] Group 4: Broader Implications - The use of domestically produced high-purity iron has improved the yield of 28nm chips, increased the lifespan of aerospace components, and reduced energy losses in power grids [7] - The project has been recognized with a Metallurgical Science and Technology Award in 2025, indicating its significance in the industry [7] - This development reflects a broader trend of China moving from reliance on imports to becoming a technology exporter, enhancing strategic security [7][9]

而引发全球供应链大地震的，既不是稀土，而是一种听起来再普通不过的东西铁。 2026年开年，全球特种材料市场正经历着一场前所未有的"雪崩"。 日本老牌特材企业订单量断崖式下跌，曾经那些甚至不需要去维护就能自动续约的长期合同，如今却成 了烫手山芋。 为了拿回市场只能打价格战，可以说是"自杀式"的割肉，直接将价格砍到了原先的三分之一。 美国也坐不住，主动联系中国，曾在自己的垄断的领域被人碾压。 这次说到的铁肯定就是我们家里铁锅的铁，而是提纯到"5N"级别的铁。 在材料学界，有一个形象的比喻，如果把十万吨的铁料铺在地上，要达到5N级别的纯度，意味着里面 所有的杂质加起来不能超过8公斤。 被锁死的"工业黄金" 对于碳、氮、氧这些极难剔除的气体杂质，其含量总和被死死卡在百万分之4.5（4.5ppm）以内。 这就好比在一座标准的足球场草坪上，只允许你留下一粒沙子。 而这粒"沙子"曾是横亘在中国制造业面前的一座大山。 在过去五十多年里，全球只有美国和日本掌握了这种极限提纯技术。因为稀缺所以昂贵，因为垄断，所 以傲慢。 美日厂商曾将这种超纯铁的售价定在每吨20万元人民币的高位，而且态度极其强硬：爱买不买，不买拉 倒。 更令人窒 ...

超纯铁，又称高纯铁，是通过电解净化、真空熔炼等先进的精炼工艺生产的，其碳、硫、氧和金属杂质含量极低。超纯铁，通常缩写 为 UPI ，是一种高度精炼的铁，其特点是杂质含量极低。 该纯度水平通常超过 99.9% ，某些等级高达 99.9999% （六个九纯度）。 目前，我国大规模工业化生产的纯铁纯度为 99.0% ～ 99.9% （ 2N ～ 3N ）。龙凤山铸业已实现高纯生铁和超高纯生铁的工业化生产 并用于高端装备制造。上海大学与龙凤山铸业经过多年合作，在开发 4N 级高纯铁方面已取得了重要进展—— 2021 年首次制备出公 斤级 4N7 高纯铁， 2023 年实现产业化制备 4N 级电解纯铁， 2 024 年制备出纯度为 99.9992% （ 5N 级）的超纯铁。 5N 级超纯铁的 制备一直是世界级的科技难题，之前仅有发达国家日本和美国在实验室制备出 5N 级超纯铁。报告统计范围主要为 4 N 级和 5 N 级 超 纯铁 。 超纯铁行业目前现状分析 | 发展现状 | 描述 | | --- | --- | | 多领域推动产业扩张 | 近年来，随着新能源、半导体、精密仪器、航空航天等高端制造领域的快速发展，超纯铁 ...