| TiO_2含量对低镁含锰渣的流动性和热力学性质的影响 |
| |
| 作者姓名： | 常治宇 焦克新 张建良 宁晓钧 刘增强 |
| |
| 作者单位： | 北京科技大学冶金与生态工程学院 |
| |
| 基金项目： | 国家自然科学基金青年科学基金资助项目(51704019). |
| |
| 摘 要： | 为探究钛矿护炉和锰矿洗炉条件下TiO_2对炉渣流动性和热力学性质的影响机理,本文通过黏度实验和FactSage热力学软件计算,分析了不同TiO_2含量低镁含锰渣的黏度和熔化温度、热焓及活度等热力学性质变化。结果表明,随着TiO_2含量的增加,炉渣黏度、熔化性温度和完全熔化温度降低,炉渣的流动性和热稳定性改善。炉渣热焓和液相中的TiO_2活度随TiO_2含量的增加而增大,而热焓的增大将增加高炉的热量消耗和燃料比。在冷却结晶过程中,TiO_2含量的增加有利于增大钙长石、钙钛矿和橄榄石等物相的析出量,而黄长石和硅灰石的析出量则随TiO_2含量的增加而降低。
|
| 关 键 词： | TiO2 高炉渣 黏度 流动性 热力学性质 物相变化 |
| 收稿时间： | 2018/3/10 0:00:00 |
Effects of TiO2 content on the fluidity and thermodynamic properties of low-magnesium manganese slag |
| |
| Authors: | Chang Zhiyu Jiao Kexin Zhang Jianliang Ning Xiaojun and Liu Zengqiang |
| |
| Institution: | School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China,School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China,School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China,School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China and School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China |
| |
| Abstract: | In order to explore the influence mechanism of TiO2 on the fluidity and thermodynamic properties of slag under the condition of furnace protection with titanium ore and furnace flushing by manganese ore, the variations of viscosity, melting temperature, enthalpy and TiO2 activity of the low magnesium manganese-bearing slags with different TiO2 contents were analyzed by the viscosity experiment and FactSage thermodynamic software calculation. The results show that with the increase of TiO2 content, the viscosity, melting temperature and complete melting temperature of the slag decrease, and the fluidity and thermal stability of the slag are therefore improved. Besides, the enthalpy of the slag and TiO2 activity in liquid phase increase with the increase of TiO2 content, and the enthalpy enhancement will lead to an increase in the heat consumption and fuel ratio of the blast furnace. During the cooling crystallization process, the increase of TiO2 content is beneficial to increasing the amount of precipitates such as anorthite, perovskite and olivine, while the precipitation quantity of melilite and wollastonite decreases as a result. |
| |
| Keywords: | TiO2 blast furnace slag viscosity flowability thermodynamic property phase change |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《》浏览原始摘要信息 |
| 点击此处可从《》下载免费的PDF全文 |
|
