关键词: 超纯铁精矿, 矿物学基因, 磁选, 浮选

Abstract: High-pure iron concentrate requires a total iron content of over 71.50% and impurity con⁃ tent such as SiO₂ below 0.3%. These extremely high-quality standards pose significant technological chal⁃ lenges for industrial production. Based on a comprehensive analysis of preparation technologies for high�pure iron concentrate and literature research，the following conclusions can be drawn.①The process miner⁃ alogical characteristics of iron ore and ordinary iron concentrate are key factors determining the feasibility of producing high-pure iron concentrate. An evaluation system based on mineralogical genetic characteristics can efficiently screen raw materials suitable for producing high-pure iron concentrate.②In terms of prepara⁃ tion technology，if the ore has a relatively coarse dissemination grain size and simple mineral composition and structure，it can be ground until the content of -0.043 mm particles exceeds 95% to achieve sufficient monomer liberation. Then，a stage grinding-single magnetic separation process can be employed to produce high-pure iron concentrate with a total iron content above 71.50%. For magnetite with fine dissemination grain size and complex mineral composition，further flotation or magnetic-flotation combined processes are required to efficiently produce high-pure iron concentrate with a total iron content higher than 71.5% and impurity content such as SiO₂ below 0.3%. When the concentrate contains a high amount of intergrowth parti⁃ cles，chemical leaching methods using sulfuric acid or sodium hydroxide can be applied to further reduce the content of SiO₂ and other impurities. However，due to environmental and cost concerns，leaching is not the preferred option for industrial production.③With technological breakthroughs such as the magnetic sus⁃ pension separation-reverse flotation combined process developed by Baosteel and the short-flow beneficia⁃ tion technology for extremely refractory lean hematite ore introduced by Ansteel，green and low-carbon， short-flow optimized production processes for high-pure iron concentrate are gradually advancing its large�scale industrial development. To further achieve green，efficient，and scalable production of high-pure iron concentrate，future efforts should continue to focus on the research and development of green processes such as high-voltage pulse crushing-selective liberation，photoelectric sorting-biological desilication，and com⁃ prehensive resource utilization.

Key words: high-pure iron concentrate, mineralogical gen, magnetic separation, flotation