复杂钛铁矿氢还原与氯化机理研究
文献类型：学位论文
| 作者 | 席亮 |
| 学位类别 | 硕士 |
| 答辩日期 | 2010-05-22 |
| 授予单位 | 中国科学院研究生院 |
| 导师 | 袁章福 |
| 关键词 | 钛铁矿 氢还原 多级流化床 氯化中试 四氯化钛 |
| 其他题名 | Research on hydrogen reduction and chlorination mechamism of complex ilmenite |
| 学位专业 | 化学工艺 |
| 英文摘要 | As the main material, Titanium tetrachloride (TiCl4) plays a core role on the production of titanium white and sponge titanium in titanium metallurgy. In China, there are abundant resources of the ilmenite ore, along with the resources of high-grade titanic mineral rutile are decreasing worldwide, the rational exploitation and utilization of ilmenite ore become an inevitable trend. Hydrogen reduction of ilmenite was investigated. The gas used for reduction was the mixture of hydrogen and nitrogen (50vol% H2), and the reaction temperature was in the range of 923～1123K. As shown in the experiment, the reduction degree increasing along with the temperature rising, the reaction degree can reach to 74% in 1123K after 40min. The volume reaction model was employed to analyze the experimental data and the activation energy was 64.36kJ/mol which was calculated by date fitting. The activation energy of reduction reaction with carbon was more than that with hydrogen, so it was easier for hydrogen to reduce the ilmenite concentrate than carbon did. The mature fluidizing chlorination in China possessed the advantages of high production capacities, low slag quantity and environmentally benign characters. However, it is hard to resolve the agglomeration problem caused by titanium minerals with high content of MgO and CaO. The titanium-rich material with low content of MgO and CaO all over the world has accounted for 7 mass%, which can be suitable to fluidizing chlorination. A novel multi-stage series fluidized bed with potentially valuable application has been proposed to promote anti-agglomeration of material powders by strong shear force generated from interior turbulent. Previous works mainly focused on the prediction and identification of optimal process parameters by simulation and verification of anti-agglomeration effect by hot test on a small scale. In this work, investigation of application of prior research in industrial test was processed. The industrial test for production of TiCl4 with multi-stage series fluidized bed has been carried out under the technological conditions identified by previous work. The results show that the multi-stage series fluidized bed is capable of anti-agglomeration to some extent. The existence of CaCl2 and MgCl2 in dust slag indicates that chlorides in appreciable quantity which leads to agglomeration discharged from the fluidized bed. |
| 语种 | 中文 |
| 公开日期 | 2013-09-22 |
| 页码 | 77 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/1639]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 推荐引用方式 GB/T 7714 | 席亮. 复杂钛铁矿氢还原与氯化机理研究[D]. 中国科学院研究生院. 2010. |
入库方式： OAI收割
来源：过程工程研究所
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