钢铁研究总院等申请真空还原熔炼制备高纯稀土铁合金专利，得到成分可控的高纯稀土铁合金

Group 1 - The State Intellectual Property Office of China has published a patent application for a method of producing high-purity rare earth iron alloys through vacuum reduction smelting, filed by Steel Research Institute Co., Ltd. and Inner Mongolia Northern Rare Earth New Materials Technology Innovation Co., Ltd. [1] - The patent aims to address the technical challenges in producing high-purity rare earth iron alloys, particularly for high-quality rare earth steel smelting [1]. - The method involves several steps, including adding pure iron to a melting chamber, maintaining a vacuum of 67-150 Pa, and heating the iron liquid to 1600-1650°C for 20-30 minutes to achieve a controllable composition of high-purity rare earth iron alloys [1]. Group 2 - Steel Research Institute Co., Ltd. was established in 1993 in Beijing, focusing on research and experimental development, with a registered capital of 26.932 million RMB [2]. - The company has invested in 9 enterprises, participated in 499 bidding projects, and holds 1,682 patents along with 69 trademark registrations [2]. - Inner Mongolia Northern Rare Earth New Materials Technology Innovation Co., Ltd. was founded in 2023 in Baotou, with a registered capital of 1 million RMB, primarily engaged in technology promotion and application services [2].