半循环流化床破碎高钙镁高钛渣聚团的基础研究

项目名称： 半循环流化床破碎高钙镁高钛渣聚团的基础研究

项目编号： No.51374261

项目类型： 面上项目

立项/批准年度： 2014

项目学科： 矿业工程

项目作者： 陈恒志

作者单位： 重庆大学

项目金额： 80万元

中文摘要： 本项目针对中国特有的高钙镁钛渣在流化氯化过程中由于形成硬聚团无法使用这一问题开展相关的基础研究。常用的破碎聚团的方法对硬聚团无效，本研究通过探索聚团结构演化与宏观反应器结构，介观相结构以及微观钛渣颗粒表面结构之间的关系，掌握多尺度调控聚团的规律;考察聚团对气固相间传递效率的影响，建立多相流动传递/反应耦合的调控理论,寻求一种多尺度协同作用新的破碎聚团的半循环流化技术方法。主要研究内容有：流化床内气固双组分颗粒流动结构和反应动力学的研究；高温氯化过程钛渣颗粒表面微结构变化的研究；硬聚团的破碎及多尺度调控规律的研究；气固双组分颗粒流动-氯化反应耦合模型的建立。本项目旨在利用半循环流化工艺解决高温氯化反应形成硬聚团的问题，为高钙镁高钛渣高温氯化新工艺提供新的技术方法，也为气固流态化两相流及反应过程的研究提供新的思路，同时丰富和发展流态化和反应工程理论。

中文关键词： 冶金反应工程;流态化;聚团;多相流;多尺度

英文摘要： This program focuses on the hard cluster formed by titanium slag particles due to theirs high level of CaO and MgO when titanic ore reserved in Panzhihua region in China is used as the raw of manufacturing TiCl4 in the fluidized bed and the common methods for breaking ordinary clusters can't effectively break the hard clusters. The relations between the evolvement of the clusters and macro-scale ractor strucutre and meso-scale phase structure and micro-surface structure of titanium slag particles will be determined and the laws governing the cluster size during carbochlorination process will be discovered. The effects of the clusters on the transportation efficiency between gas and solids are investigated and a new model integrated hydrokinetics of gas-solids flow and reaction kinetics of carbochlorination is established. So, a novel approach named a semi-CFB technique, that is, the non-adhesive carbon particles are cycled in the circulating fluidized bed and the adhesive titanium slag particles are suspended in the bubble fluidized bed, is developed to break the clusters based on the mutilscale analysis.The research mainly contains: Studying the effects of cycling light component on the hydrodynamics of gas-solids and reaction kinetics in bubble fluidized bed; Variations of the surface microstructure of titanic particles during carbochlorination process; Breaking the hard clusters and discovering the laws of governing the cluster size; Developing a model about carbochlorination process in a semi-CFB. The proposed the semi-CFB process will provide a new technique for breaking the clusters formed during carbochlorination process. The achievement in this project will also contribute to the development of fluidization, metallurgy and reaction engineering theory.

英文关键词： Metallurgicial reaction engineering;fluidization;cluster;mutilphase flow;mutilscale