Wencheng Ge , Jie Liu , Tianjiao Chang , Yanjun Li , Yongsheng Sun , Shumin Zhang , Yuexin Han , Yimin Zhu
{"title":"从铁精矿到洁净钢:以制备高纯铁精矿为核心的绿色短工序生产技术","authors":"Wencheng Ge , Jie Liu , Tianjiao Chang , Yanjun Li , Yongsheng Sun , Shumin Zhang , Yuexin Han , Yimin Zhu","doi":"10.1016/j.mineng.2025.109617","DOIUrl":null,"url":null,"abstract":"<div><div>With the accelerating shift toward high-end and low-carbon steel products, high-purity iron concentrates (HPIC) have become indispensable raw materials. In this study, a green and short-process clean steel-based production process route was developed, and the preparation of HPIC was guided by a new evaluation system based on process mineralogical characteristics. The evaluation system was established and validated by characterizing 10 magnetite-based iron concentrates from different deposits in China (including chemical composition, particle size, and paragenesis type). A combined pre-concentration, multi-stage grinding–weak magnetic separation, electromagnetic separation, and reverse flotation (PCMF) flowsheet was optimized to yield UPIC with TFe > 71.8 % and SiO<sub>2</sub> < 0.3 % (acid-insoluble <0.2 %) and HPIC with TFe > 70 % and SiO<sub>2</sub> < 2 %, achieving overall recoveries above 93 %. The UPIC and HPIC were further converted into direct reduced iron in a tunnel kiln and then smelted in a low-carbon electric furnace, delivering pure iron with TFe > 99.90 %, suitable for clean steel base applications. An energy-consumption model quantifies that replacing conventional feed with HPIC reduces steelmaking energy demand, demonstrating significant potential for CO<sub>2</sub> mitigation. This integrated pathway provides a scalable strategy for high-efficiency, low-carbon, clean steel production using domestic iron ores.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"233 ","pages":"Article 109617"},"PeriodicalIF":4.9000,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"From iron concentrate to clean steel: A green short-process production technology centered on preparing high-purity iron concentrate\",\"authors\":\"Wencheng Ge , Jie Liu , Tianjiao Chang , Yanjun Li , Yongsheng Sun , Shumin Zhang , Yuexin Han , Yimin Zhu\",\"doi\":\"10.1016/j.mineng.2025.109617\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>With the accelerating shift toward high-end and low-carbon steel products, high-purity iron concentrates (HPIC) have become indispensable raw materials. In this study, a green and short-process clean steel-based production process route was developed, and the preparation of HPIC was guided by a new evaluation system based on process mineralogical characteristics. The evaluation system was established and validated by characterizing 10 magnetite-based iron concentrates from different deposits in China (including chemical composition, particle size, and paragenesis type). A combined pre-concentration, multi-stage grinding–weak magnetic separation, electromagnetic separation, and reverse flotation (PCMF) flowsheet was optimized to yield UPIC with TFe > 71.8 % and SiO<sub>2</sub> < 0.3 % (acid-insoluble <0.2 %) and HPIC with TFe > 70 % and SiO<sub>2</sub> < 2 %, achieving overall recoveries above 93 %. The UPIC and HPIC were further converted into direct reduced iron in a tunnel kiln and then smelted in a low-carbon electric furnace, delivering pure iron with TFe > 99.90 %, suitable for clean steel base applications. An energy-consumption model quantifies that replacing conventional feed with HPIC reduces steelmaking energy demand, demonstrating significant potential for CO<sub>2</sub> mitigation. This integrated pathway provides a scalable strategy for high-efficiency, low-carbon, clean steel production using domestic iron ores.</div></div>\",\"PeriodicalId\":18594,\"journal\":{\"name\":\"Minerals Engineering\",\"volume\":\"233 \",\"pages\":\"Article 109617\"},\"PeriodicalIF\":4.9000,\"publicationDate\":\"2025-07-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Minerals Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0892687525004455\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Minerals Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0892687525004455","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
From iron concentrate to clean steel: A green short-process production technology centered on preparing high-purity iron concentrate
With the accelerating shift toward high-end and low-carbon steel products, high-purity iron concentrates (HPIC) have become indispensable raw materials. In this study, a green and short-process clean steel-based production process route was developed, and the preparation of HPIC was guided by a new evaluation system based on process mineralogical characteristics. The evaluation system was established and validated by characterizing 10 magnetite-based iron concentrates from different deposits in China (including chemical composition, particle size, and paragenesis type). A combined pre-concentration, multi-stage grinding–weak magnetic separation, electromagnetic separation, and reverse flotation (PCMF) flowsheet was optimized to yield UPIC with TFe > 71.8 % and SiO2 < 0.3 % (acid-insoluble <0.2 %) and HPIC with TFe > 70 % and SiO2 < 2 %, achieving overall recoveries above 93 %. The UPIC and HPIC were further converted into direct reduced iron in a tunnel kiln and then smelted in a low-carbon electric furnace, delivering pure iron with TFe > 99.90 %, suitable for clean steel base applications. An energy-consumption model quantifies that replacing conventional feed with HPIC reduces steelmaking energy demand, demonstrating significant potential for CO2 mitigation. This integrated pathway provides a scalable strategy for high-efficiency, low-carbon, clean steel production using domestic iron ores.
期刊介绍:
The purpose of the journal is to provide for the rapid publication of topical papers featuring the latest developments in the allied fields of mineral processing and extractive metallurgy. Its wide ranging coverage of research and practical (operating) topics includes physical separation methods, such as comminution, flotation concentration and dewatering, chemical methods such as bio-, hydro-, and electro-metallurgy, analytical techniques, process control, simulation and instrumentation, and mineralogical aspects of processing. Environmental issues, particularly those pertaining to sustainable development, will also be strongly covered.