含钛硅酸盐体系中有价组分的组合析出及其材料化研究

项目名称： 含钛硅酸盐体系中有价组分的组合析出及其材料化研究

项目编号： No.51204004

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 冶金与矿业学科

项目作者： 吕辉鸿

作者单位： 安徽工业大学

项目金额： 25万元

中文摘要： 含钛高炉渣成分杂且含有酸性、碱性和两性组分，在对其进行湿法处理中，难以对多目标组分进行有效分离，因而只能对其进行粗放式利用。为此，我们务必解决："含钛硅酸盐体系在共沉淀过程中，目标组分的组合析出及粒子生长控制机制"这一关键科学问题。本项目以含Fe3+和Mg2+的Si、Al、Ti溶胶的含钛硅酸盐体系(FMSAT)为研究对象，采用ICP、XRF和XPS等手段，建立通过测定相关离子活度，推导TiO(OH)2和Al(OH)3粒子过饱和度的方法，构建目标组分胶体粒子的宏观生长动力学模型；通过FTIR和TEM系统研究不同反应条件对粒子结构和形貌的影响，阐明FMSAT中目标组分的析出控制机制；并以目标组分制备钛酸铝，由EPMA和TG-DSC等分析其结构和组成与热稳定性的关系。本项目的顺利实施，不仅为FMSAT中目标组分的组合析出提供理论指导，而且为含钛高炉渣的高附加值利用提供了研究基础和很好的应用前景。

中文关键词： 含钛硅酸盐；共沉淀；含钛高炉渣；钛酸铝复合材料；组合析出

英文摘要： Due to the complexity of components and presence of acidic、basic and amphoteric elements in Ti-bearing blast furnace slag(Ti-slag)it is hard to precipitate the mutil target components and leads to low added uses of Ti-slag. Therefore we must resolve the key scientific problems of control of precipitation of combination for the target components and the growth mechanism of particles in the titanium contained silicate in the basic coprecipitation process. Using the titanium contained silicate of Fe3+ and Mg2+ contained Si、Al、Ti sol system (FMSAT) as the research object, tools of ICP、XRF and XPS are used to determine activities of correlative ions and the degree of super saturation of TiO(OH)2 and Al(OH)3 are deduced. And the macroscopic kinetics model of the target components is established.Systemic studies are performed to obtain the effects of reaction conditions on the structure and shapes of particles via FTIR and TEM. Thus the control mechanism of precipitation of combination for the target components (Ti-Al) can be clarified. Furthermore, the aluminum titanate is fabricated by the coprecipitates and the effects of the structure and composition on the thermal stability of aluminum titanate are also examined via EPMA and TG-DSC. Therefore we can not only provide the theory evidence of precipitation of combinat

英文关键词： titanium containing silicates；co-precipitation；Ti-bearing blast furnace slag；aluminum titanate composite；precipitation of combination; Ti-bearing blast fur