中国难处理铁矿石磁化焙烧还原新技术研究现状

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering Pub Date : 2024-10-15 DOI:10.1016/j.mineng.2024.109041

Ying Xu , Enshuo Li , Yanbo Zhang , Lukuo Hong , Xulong Yao

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引用次数: 0

摘要

铁矿石是冶炼钢铁的原料，钢铁冶炼工业在国民经济发展中占有重要地位。我国铁矿石储量大，但具有品位低、分选难等特点，限制了国产铁矿石的应用。为了满足中国钢铁工业对原材料的需求，中国长期从其他国家进口铁矿石。因此，中国对进口铁矿石的依赖性强、国产铁矿石利用率低的问题亟待解决。研究表明，磁性焙烧还原技术是降低铁矿石中铁矿相、改善铁矿石磁性能的有效方法。而且磁焙烧还原技术可以优化铁矿石的磁选选择性。通过对磁化焙烧后的铁矿石进行磁选，可以获得高品位的精铁矿石。磁化焙烧-磁选工艺能有效提高国产矿的富集和选别效率，提高国产矿的利用率。本文综述了以菱铁矿、赤铁矿和褐铁矿为主体的铁矿石相经碳基焙烧还原工艺或氢基焙烧还原工艺后的还原效果以及磁选后精铁矿石质量的研究现状，提出了不同矿石还原焙烧工艺的最佳还原体系。介绍了不同铁矿相矿石在碳基焙烧还原和氢基焙烧还原过程中各矿物相的转化规律和反应机理。分析了磁性焙烧还原技术的未来发展方向，对其他难选铁矿石磁性焙烧还原技术的选择及后续富矿、选矿技术的发展具有指导意义。

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$Research status of new technology for magnetization roasting and reduction of refractory iron ore in China$

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Research status of new technology for magnetization roasting and reduction of refractory iron ore in China

Iron ore is the raw material for smelting steel, and the steel smelting industry occupies an important position in the development of the national economy. In China, the reserves of iron ore are large, but the iron ore has the characteristics of low grade and sorting is difficult, which limits the application of domestic iron ore. In order to meet the demand for raw materials in China’s steel industry, China has long imported iron ore from other countries. Therefore, China’s strong dependence on imported iron ore and the low utilization rate of domestic iron ore need to be solved urgently. Studies have shown that magnetic roasting reduction technology is an effective method to reduce the iron ore phase in iron ore and improve the magnetic properties of iron ore. And magnetic roasting reduction technology can optimize the magnetic separation selectivity of iron ore. Through the magnetic separation of the iron ore after magnetization roasting, high-grade fine iron ore can be obtained. The magnetization roasting-magnetic separation process can effectively improve the enrichment and separation efficiency of domestic ores and improve the utilization rate of domestic ores. In this paper, the reduction effect of siderite, hematite and limonite as the main iron ore phase after carbon-based roasting reduction technology or hydrogen-based roasting reduction technology and the research status of the quality of concentrate iron ore after magnetic separation are reviewed, and the best reduction system of different ore reduction roasting process is put forward. The transformation law and reaction mechanism of each mineral phase in the process of carbon-based roasting reduction and hydrogen-based roasting reduction of ores with different iron ore phases are introduced. The future development direction of magnetic roasting reduction technology is analyzed, which has guiding significance for the selection of magnetic roasting reduction technology for other refractory iron ores and the development of subsequent mineral enrichment and separation technology.

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来源期刊

Minerals Engineering 工程技术-工程：化工

CiteScore

8.70

自引率

18.80%

发文量

519

审稿时长

81 days

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.