| 持续氧化对钢水钙处理过程中夹杂物的影响 |
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| 引用本文： | 彭开玉,刘洋,张立峰.持续氧化对钢水钙处理过程中夹杂物的影响[J].中国冶金,2018,28(3):16-21. |
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| 作者姓名： | 彭开玉 刘洋 张立峰 |
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| 作者单位： | 1. 首钢股份公司迁安钢铁公司炼钢作业部， 河北 迁安 064400 2. 北京科技大学冶金与生态工程学院， 北京 100083 |
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| 摘 要： | 采用感应炉研究了持续氧化对钙处理过程夹杂物的影响。结果表明，在氧化发生前，钙的挥发是夹杂物成分转变的主要原因；氧化发生后会依次与钢中的钙、铝和硅元素发生反应，夹杂物转变规律为CaO- CaS- (Al2O3)→CaO- (CaS)- Al2O3→(CaO)- Al2O3→Al2O3→SiO2。夹杂物的数密度从10升高到210个/mm2，最终样品夹杂物的数密度为300个/mm2。根据钢液成分的检测结果，可将试验分为钙挥发期、铝氧化期和硅氧化期，对氧化过程分阶段进行热力学计算，能够更加准确地预测夹杂物成分。
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| 关 键 词： | 夹杂物 钙处理 二次氧化 热力学计算 |
Effect of continuous reoxidation on inclusions in molten steel during calcium treatment |
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| PENG Kai- yu,LIU Yang,ZHANG Li- feng.Effect of continuous reoxidation on inclusions in molten steel during calcium treatment[J].China Metallurgy,2018,28(3):16-21. |
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| Authors: | PENG Kai- yu LIU Yang ZHANG Li- feng |
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| Affiliation: | （1. Steelmaking Department, Shougang Qian′an Iron and Steel Co., Ltd., Qian′an 064400, Hebei, China 2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China） |
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| Abstract: | The effect of continuous air absorption on inclusions in molten steel during calcium treatment was investigated using the induction furnace. Before reoxidation occurred, the vaporization of calcium significantly influence the composition of inclusions. After reoxidation, the reaction between aluminum, calcium, silicon and oxygen occurred. The evolution of inclusions was CaO- CaS- Al2O3→CaO- (CaS)- Al2O3→ (CaO)- Al2O3→Al2O3→SiO2. The number density of inclusion increased from 10 to 210/mm2, and finally increased to 300/mm2. Based on the measured results of composition of steels, the process was divided to three stages, i.e., the vaporization of calcium, the reoxidation of aluminum and the reoxidation of silicon. The composition of inclusions was predicted accurately via thermodynamic calculation in different stages during the process. |
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| Keywords: | Inclusions Calcium treatment Reoxidation Thermodynamic calculation |
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