【作者】 葛会超；

【导师】 吕宪俊；

【作者基本信息】 山东科技大学 ， 化学工艺， 2007， 硕士

【摘要】 胶结材料可以说是矿山尾矿胶结工艺中料浆配合设计的核心，它既是决定胶结体强度的关键指标，又是影响工艺成本的最重要因素。因此，开发低成本、性能优良的新型胶结材料成为国内外矿业学者广泛关注和研究的热点。针对传统尾矿胶结材料存在用量大、成本高及性能差等问题，本文主要探讨以普通硅酸盐水泥和改性水淬渣胶凝材料作为原料复合而成的新型胶结材料。主要从新型复合胶结材料的组分配合、胶结机理以及固结尾砂的应用三个方面进行研究，旨在开发出一种性能较传统胶结材料更优良的新型材料。通过对新型胶结材料组分配合研究发现：尾砂骨料的粒度是影响新型胶结材料最佳组分配合比的关键因素，两者之间存在明显的匹配性——随着尾砂粗粒级含量的增加，对应最佳组分中的改性水淬渣胶凝材料含量要增加。基于以上研究结果，总结出新材料的特性，同时从复合理论分析了新材料性能优异的原因。在胶结机理研究中，利用SEM、EDS、XRD和DSC对新型胶结材料水化产物微观分析发现：与普通硅酸盐水泥或铝酸盐水泥的水化产物不同，不含水化铝酸盐，不含或含有极少量的Ca（OH）₂，主要为微晶或隐晶结构的C-S-H凝胶或C-S-A-H凝胶。基于以上研究，初步探讨新型胶结材料的水化作用机制：一方面就是利用硅酸盐水泥水化生成的碱性产物发生二次反应，激发水淬渣胶凝材料；另一方面，由于“晶种诱导结晶”作用使水化反应历程和产物有所不同。进而分析出其胶结机理：不同组分配合的胶结材料的水化产物不同，根据胶结骨料粒度的不同，要求水化产物在胶结体系中要么起填充颗粒空隙作用、要么起骨架支撑作用。这也解释了组分配合与尾砂粒度存在的匹配性关系的原因。最后，以固结北洺河铁矿尾砂的应用研究为例，利用二元正交回归试验，建立胶结强度的二元二次模型。同时，基于复合胶结材料最佳配合比与胶结尾砂粒度的匹配性关系，提出利用多元正交试验，建立胶结强度多元线性模型，以便对胶结最佳工艺条件的选择与控制。本研究对开发新型尾矿胶结材料提供技术支持和理论依据，同时，提出建立强度与相关因素数学定量关系能指导胶结材料在尾矿胶结实际生产中更好的应用。更多还原

【Abstract】 Binding materials is the core of slurry design in the tailings cementation process, as it is not only the key index of cementation strength but also the most important factor of technologic cost. So, the novel binding materials which are low cost and superior performances catch many scientist’s attention in recent years.The project is aimed at that traditional binding materials have been being high dosage, high cost, and inferior performances, The composite binding material which is made of Portland cement and Modified slag cement, was discussed in this thesis. The ratio of raw binding materials, matching mechanism relationship between mixing ratio and tailing granularity and application of the novel binding material in the field of tailing cementation were mainly investigated. In order to develop a new composite binding material which is lower dosage, lower cost and more inferior performances .According to the study on ratio of the raw binding material, it was found that the matching relationship between composite ratio and tailing granularity existed. Tailing granularity is the key factor of optimal mixing ratio of the novel binding material. Based on the results of reseach, the characteristics of the novel binding material were summarized, meanwhile, the reason of superior performances were analyzed by composite theory. Hydration products and course were discussed through microcosmic analyze of the novel material were studied by SEM, EDS, XRD and DSC. Compared with silicate cement and sulphoaluminate cement, the novel composite binging material has its own hydration products, not containing hydrate aluminates and containing little or a little of calcium hydroxide. The hydration produces of the composite binding material were C-S-H gel or C-S-A-H gel. Based on above, the hydration mechanism is that one side, calcium hydroxide that is produced by silicate cement occur the second react to excitated the reaction of Modified slag cement. On the other hand, hydration products and course were determined by the "principle of crystalloid abduction". Then According to theories of filling aggregate, the cementation mechanism of the novel material was discussed. With the change of mixing ratio, its hydration products were different, which play either fill or framework sustain role in tailing cementation. Those explained the matching relationship between composite ratio and tailing granularity. At last, application of the novel binding material in the field of Bei Minghe iron mine tailing cementation as example, cementation strength model was set up through two way orthogonal regression design. Considering matching relationship between composite ratio of the novel material and tailing granularity, multiple factors orthogonal experiment and multiple linearity model were set up, in order to choose and control optimal condition in the application of binding materials.The conclusions of this thesis provides a certain theoretical base and technical foundation for the research on the novel tailings binding materials. Design of mathematics’ model between cementation strength and technologic parameter can supervise the application of the novel binding material.更多还原