| 炼钢过程中合金减量化研究现状及展望 |
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| 作者姓名： | 包燕平 张超杰 王敏 |
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| 作者单位： | 北京科技大学钢铁冶金新技术国家重点实验室,北京,100083;北京科技大学钢铁冶金新技术国家重点实验室,北京,100083;北京科技大学钢铁冶金新技术国家重点实验室,北京,100083 |
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| 基金项目： | 国家自然科学基金资助项目(51404022)钢铁冶金新技术国家重点实验室自主基金资助项目(41614014) |
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| 摘 要： | 综述了炼钢过程中合金减量化的研究现状,分别从合金的基本物理化学特征、合金的加入工艺和炼钢工艺三大方面讨论了合金收得率的研究进展情况.重点介绍了合金粉化控制技术、合金在真空条件下的损失控制技术、合金的熔化控制技术和合金替代技术的应用,为炼钢过程中的合金减量化研究提供借鉴.合金减量化技术的应用前景非常可观,合金的损失途径和损失机理研究、合金的结构设计、合金的替代技术和合金的管理管控技术可以作为炼钢过程中合金减量化研究的重点方向.
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| 关 键 词： | 炼钢 铁合金 减量化 收得率 耗量 |
| 收稿时间： | 2017-08-01 |
Situation and prospect on investigation of ferroalloy reduction during steelmaking |
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| Affiliation: | State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | As China steel industry continues to face more prominent overcapacity and environmental pollution problems, reduction of ferroalloy continues to attract more attention as a cost reduction and efficiency improvement method. In this paper, the current research status of ferroalloy reduction was summarized. Advancements on ferroalloy reduction were discussed from three aspects:ferroalloy physical and chemical characteristics, ferroalloy addition technique, and steelmaking process. The control technique of ferroalloy self-powdering, loss encountered under vacuum conditions during ferroalloy utilization, melting of ferroalloy in molten steel, and alternative techniques were introduced. These techniques can serve as a reference for ferroalloy reduction during steelmaking. The shape, physical, and chemical properties as well as complex structure affect the yield of ferroalloy during steelmaking. The manner of ferroalloy addition, sequence and time of ferroalloy addition were summarized and contrasted. Self-powdering and bitterness-powdering of ferroalloys are difficult problems during the utilization of these alloys, and should be controlled at the initial usage of ferroalloys. Powdered and volatile ferroalloys easily encounter loses under vacuum conditions, and better utilization can be realized by lowering the vacuum conditions, as it can lead to a low flow speed of the argon in the vacuum chamber and reduce the volatility rate of the elements in volatile ferroalloys. In addition, ferroalloys with different densities and granularities have different melting time and movement tracks. Large ferroalloys with a low density have a long melting time and easily float between molten steel and slag, which can cause ferroalloy oxidation. Therefore, the yields obtained using ferroalloys with different densities and granularities are different. Ferroalloys of different structures and granularities should be designed to optimize yields. The application of ferroalloy reduction techniques has extensive prospect. Investigation of the mechanism of ferroalloy loss, structural design of ferroalloys, as well as alternative techniques and control techniques should be key research areas in ferroalloy reduction during steelmaking. |
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