| FeO影响CaO-SiO_2-MgO-Al_2O_3-Cr_2O_3体系中含铬尖晶石晶体析出的热力学分析 |
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| 引用本文： | 余岳,王迪,李建立,朱航宇,薛正良. FeO影响CaO-SiO_2-MgO-Al_2O_3-Cr_2O_3体系中含铬尖晶石晶体析出的热力学分析[J]. 武汉科技大学学报, 2018, 0(1): 15-19 |
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| 作者姓名： | 余岳 王迪 李建立 朱航宇 薛正良 |
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| 作者单位： | 1.武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北 武汉, 430081;2.武汉科技大学钢铁冶金新工艺湖北省重点实验室,湖北 武汉,430081,1.武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北 武汉, 430081;2.武汉科技大学钢铁冶金新工艺湖北省重点实验室,湖北 武汉,430081,1.武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北 武汉, 430081;2.武汉科技大学钢铁冶金新工艺湖北省重点实验室,湖北 武汉,430081,1.武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北 武汉, 430081;2.武汉科技大学钢铁冶金新工艺湖北省重点实验室,湖北 武汉,430081,1.武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北 武汉, 430081;2.武汉科技大学钢铁冶金新工艺湖北省重点实验室,湖北 武汉,430081 |
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| 基金项目： | 国家自然科学基金资助项目(51404173)；中国博士后科学基金资助项目(2014M562073)；湖北省自然科学基金资助项目(2016CFB579)；湖北省教育厅科学技术研究计划项目(B2017005). |
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| 摘 要： | 不锈钢渣中的铬以尖晶石矿物相状态赋存时不易溶出,有利于钢渣的资源化利用。本文基于熔体非平衡凝固理论,采用热力学数据库FactSage 7.0研究了FeO添加量对CaO-SiO_2-MgO-Al_2O_3-Cr_2O_3不锈钢渣体系中尖晶石晶体析出温度、析出量、化学组成及铬元素赋存状态的影响规律。模拟计算结果表明,尖晶石晶体为高温析出相,主要由MgCr_2O_4和FeCr_2O_4组成;随着FeO添加量不断增多,尖晶石晶体的析出温度逐渐降低,其最终析出量逐渐增加,析出物中FeCr_2O_4所占比例增加而MgCr_2O_4相对减少;铬元素的赋存状态未受FeO添加量变化影响,仍以尖晶石固溶体形式存在。
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| 关 键 词： | 不锈钢渣 铬 FeO 尖晶石 FactSage 非平衡凝固 热力学分析 |
| 收稿时间： | 2017-08-21 |
Thermodynamic calculation of FeO effect on precipitation of spinel containing chromium in CaO-SiO2-MgO-Al2O3-Cr2O3 system |
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| Yu Yue,Wang Di,Li Jianli,Zhu Hangyu and Xue Zhengliang. Thermodynamic calculation of FeO effect on precipitation of spinel containing chromium in CaO-SiO2-MgO-Al2O3-Cr2O3 system[J]. Journal of Wuhan University of Science and Technology, 2018, 0(1): 15-19 |
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| Authors: | Yu Yue Wang Di Li Jianli Zhu Hangyu Xue Zhengliang |
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| Affiliation: | 1. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China;2. Hubei Provincial Key Laboratory for New Processes of Iron-making and Steel-making, Wuhan University of Science and Technology, Wuhan 430081, China,1. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China;2. Hubei Provincial Key Laboratory for New Processes of Iron-making and Steel-making, Wuhan University of Science and Technology, Wuhan 430081, China,1. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China;2. Hubei Provincial Key Laboratory for New Processes of Iron-making and Steel-making, Wuhan University of Science and Technology, Wuhan 430081, China,1. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China;2. Hubei Provincial Key Laboratory for New Processes of Iron-making and Steel-making, Wuhan University of Science and Technology, Wuhan 430081, China and 1. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China;2. Hubei Provincial Key Laboratory for New Processes of Iron-making and Steel-making, Wuhan University of Science and Technology, Wuhan 430081, China |
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| Abstract: | Chromium existing as spinel phase in the stainless steel slags is stable and hardly dissolved out, which is beneficial to the utilization of steelmaking slags. Based on the Scheil-Gullive equation, the thermodynamic software FactSage was employed to simulate the solidification process of CaO-SiO2-MgO-Al2O3-Cr2O3system and the effect of FeO on the precipitating temperature, sediment amount and component of spinel phase and the existence of chromium were investigated. The results show that the spinel precipitates at high temperatures, and mainly consists of MgCr2O4 and FeCr2O4. When the content of FeO increases, the precipitation temperature gradually decreases, the amount grows finally, the content of FeCr2O4 in the spinel phase increases while that of MgCr2O4 decreases. However, FeO has little effect on the existing occurrence of chromium in the solid slag, and chromium is still present in the spinel mineral phase. |
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| Keywords: | stainless steel slag chromium FeO spinel FactSage non-equilibrium solidification thermodynamic analysis |
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