镁铁铝浇注料性能的研究

发布时间：2018-04-13 06:05

本文选题：水泥窑 + 方镁石　；参考：《辽宁科技大学》2015年硕士论文

【摘要】：随着大型干法水泥生产技术的发展和环境保护意识的逐步提高,由于水泥窑烧成带所用的传统耐火材料直接结合镁铬砖在生产和使用过程中所产生的六价铬离子对人体和环境都有所伤害,因此,实现水泥窑用耐火材料的无铬化、优质化、长寿化是当务之急。本课题本着节能环保的理念,以国内与国外的水泥窑无铬化技术发展为大背景,论述了大型干法水泥窑用耐火材料的一步步发展过程,深入探讨研究了方镁石-铁铝尖晶石质耐火材料的合成机理,为实现水泥窑的无铬化提出了新的思路与方向,这具有一定的现实意义。该研究通过对不同原料、不同结合剂的研究,制备出的方镁石-铁铝尖晶石质浇注料可替代目前大型干法水泥窑的广泛使用的烧成镁铬砖,此种方式具有节能、高效、施工方便等优点。本论文以不同镁砂、镁铁砂、铁铝尖晶石砂以及不同添加剂为研究对象,研究开发出了水泥窑用镁铁铝浇注料,对实现水泥窑无铬化具有一定的现实指导意义。论文首先研究了不同原料的选择对浇注料性能的影响,其次研究了铁铝尖晶石加入量的不同对浇注料性能的影响,最后研究了不同的添加剂对镁铁铝浇注料性能的影响及挂窑皮性能。研究结果表明:以高纯镁砂、铁铝尖晶石砂、硅灰等为原料所制备的镁铁铝浇注料的各项性能与检测指标均达到或超过目前水泥窑烧成带用镁铬砖指标,可替代镁铬砖,实现水泥窑无铬化的工业使用。本文的研究可以使新型无铬耐火材料镁铁铝浇注料成为新一代使用方便、性价比高、环保优势明显的水泥回转窑烧成带用耐火材料。
[Abstract]:With the development of large-scale dry-process cement production technology and the gradual improvement of environmental protection consciousness,Since the traditional refractories used in cement kiln firing belt are directly combined with magnesia chrome brick in the process of production and use, the hexavalent chromium ion produced in the process of production and use is harmful to the human body and the environment. Therefore, the refractory used in cement kiln can be chrome free and excellent in quality.Longevity is a top priority.Based on the idea of energy saving and environmental protection, and taking the development of chromium-free cement kiln technology at home and abroad as the background, this paper discusses the step by step development process of refractories used in large dry cement kilns.The synthesis mechanism of periclase-iron-aluminum spinel refractories has been studied in depth. A new idea and direction for the realization of chromium-free cement kiln has been put forward, which has certain practical significance.Through the study of different raw materials and different binders, the prepared castable of periclase and ferric aluminum spinel can replace the widely used magnesia chrome brick which is widely used in large dry-process cement kilns at present. This way has the advantages of energy saving and high efficiency.The construction is convenient and so on.In this paper, different magnesia sand, magnesium-iron sand, ferric aluminum spinel sand and different additives are taken as the research objects, and the castable of magnesia-iron-aluminum used in cement kiln is developed, which has certain practical guiding significance for realizing the non-chromate of cement kiln.Firstly, the influence of different raw materials on castable properties was studied, and then the influence of different amount of iron and aluminum spinel on castable properties was studied.Finally, the effects of different additives on the properties of magnesium, iron and aluminum castables and the properties of kiln skins were studied.The results show that the properties and testing indexes of magnesia-Fe-Al castable prepared from high-purity magnesia, Fe-Al spinel sand, silica fume and so on are up to or higher than those of magnesia-chrome brick used in sintering zone of cement kiln at present, and can be used as a substitute for magnesia-chrome brick.To realize the industrial use of the cement kiln without chromium.The research in this paper can make a new type of castable without chromium, magnesium, iron and aluminum into a new generation of refractory for sintering belt in cement rotary kiln with high performance and price ratio and obvious environmental protection advantage.
【学位授予单位】：辽宁科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ175.732

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