陶瓷研磨体在水泥与矿渣粉磨中应用的研究

发布时间：2018-06-13 14:00

本文选题：陶瓷研磨体 + 金属研磨体　；参考：《济南大学》2017年硕士论文

【摘要】：我国是世界水泥生产大国,水泥工业的能源、资源消耗巨大。而在水泥生产过程,简单的划分可以表述为“两磨一烧”,即磨生料、烧熟料、磨水泥。粉磨作业是水泥生产过程中耗电最高的一个环节,每生产一吨水泥,大约需要粉磨多种物料3~4t,能耗占整个水泥生产工艺能耗的60%—70%,其中水泥粉磨过程中的电耗所占比例高达2/3,水泥生产过程的粉磨设备—球磨机,长期使用金属研磨体作为粉磨介质,一直存在着磨耗高和效率低的问题,如何提高水泥粉磨效率,降低单位电耗一直是水泥厂关注的问题。因此通过减少粉磨过程的能耗从而达到降低生产成本进而增强企业竞争力是未来水泥生产发展的方向。不仅在水泥行业,在矿渣粉磨中也存在同样的能耗问题,减少粉磨能耗也是矿渣粉磨发展的一个未来方向。随着陶瓷工业的发展,低密度高耐磨的陶瓷研磨体为降低粉磨能耗和减少金属研磨体损耗提供了一种途径。本论文将通过使用新型陶瓷研磨体作为粉磨介质进行粉磨试验,选用水泥熟料和矿渣作为粉磨原料,模拟大磨研磨仓级配(使用粉磨级配参考实际生产级配设定),进行陶瓷研磨体和金属研磨体之间的对比试验,陶瓷球和陶瓷段之间的对比试验,探究陶瓷研磨体在水泥熟料和矿渣中的粉磨效果和节电效果,研究陶瓷研磨体对水泥和矿渣性能的影响,通过不同组级配研磨体的粉磨实验,找出合理的粉磨级配,通过颗粒粒度分布、力学性能、工作性能等检测方法,分析不同组粉磨效果,根据粉磨效果不同,优化调整研磨体的级配,达到降低粉磨能耗和提高粉磨效果的目的。并且充分考虑添加助磨剂后与粉磨物料(矿渣和熟料)性能的影响,通过设计粉磨试验,全面的得出陶瓷研磨体在水泥熟料和矿渣中的粉磨效果。并进行陶瓷研磨体工厂大磨粉磨试验,进行实际生产,对陶瓷研磨体的实际应用情况进行分析,得到以下主要研究结果:1.通过对比陶瓷研磨体(球)和金属研磨体粉磨效果,使用陶瓷研磨体后,水泥熟料45μm筛余和80μm筛余降低,比表面积提高,3d强度和28d强度最高提升到27.6MPa和52.1MPa;矿渣45μm筛余和80μm筛余降低,比表面积提高,7d活性和28d活性最高提升到88%和102%;使用陶瓷研磨体专用助磨剂进行试验后,各项数据也得到提高,说明陶瓷球适用于水泥熟料和矿渣的粉磨。2.通过对比陶瓷球和陶瓷柱粉磨效果,陶瓷柱粉磨的水泥熟料和矿渣45μm筛余和80μm筛余、比表面积、水泥3d强度和28d强度、矿粉7d和28d活性数据好于陶瓷球粉磨的数据,说明陶瓷柱的粉磨效果好于陶瓷球的粉磨效果。3.通过使用新型陶瓷研磨段进行试验,粉磨水泥和熟料效果达到最佳,设计不同级配粉磨结果分析发现,粒径小的陶瓷研磨体含量多的粉磨效果最佳,细度、比表面积、强度数据更好,因为陶瓷研磨体破碎能力较弱,研磨体能力较强,小粒径研磨体更能发挥其粉磨效果,在设计级配时采用粒径小比重多,粒径大比重少的原则。进行节电试验比较,陶瓷研磨体相比金属研磨体节电率为35.5%,证明了陶瓷研磨体具有节电效果。4.通过工厂大磨粉磨矿渣试验,更换陶瓷研磨体后,各项数据符合控制指标,优于金属研磨体粉磨效果,使用半年后,效率和性能稳定,节电效果明显。
[Abstract]:China is a great country in the world of cement production. The energy consumption of cement industry is huge. In the process of cement production, the simple division can be expressed as "two grinding and one burning", that is, grinding raw material, burning clinker and grinding cement. The grinding operation is the highest electricity consumption in the process of cement production, and every ton of cement is needed to grinding a variety of materials about 3 ~4t, energy consumption accounts for 60% to 70% of the energy consumption of the whole cement production process, of which the proportion of electricity consumption in the process of cement grinding is up to 2/3, the grinding machine in the process of cement production, the ball mill, the long use of metal grinding body as the grinding medium, has always existed the problem of high abrasion and low efficiency, how to improve the efficiency of cement grinding and reduce the unit electricity. Consumption has always been a concern of cement plant. Therefore, it is the direction of future development of cement production by reducing the energy consumption of the grinding process to reduce the cost of production and enhance the competitiveness of the enterprises. Not only in the cement industry, there is the same energy consumption problem in the slag grinding, but also to reduce the energy consumption of the powder mill is also a future of the development of slag grinding. With the development of ceramic industry, the ceramic grinding body with low density and high wear resistance provides a way to reduce the energy consumption of grinding and reduce the loss of metal grinding body. In this paper, a new ceramic grinding body is used as a grinding medium for grinding test. Cement clinker and slag are used as grinding materials to simulate the gradation of large grinding mill. The contrast test between the ceramic lapping body and the metal lapping body, the contrast test between the ceramic ball and the ceramic segment, is carried out with the comparison test between the ceramic ball and the ceramic segment, and the effect of the grinding effect and the electricity saving effect of the ceramic grinding body in the cement clinker and the slag is investigated. The grinding experiment of the same group gradation grinding body to find the reasonable grinding gradation, through the particle size distribution, mechanical properties, working performance and other testing methods, analysis the different groups of grinding effect, according to the different grinding effect, optimize the gradation of grinding body, to reduce the grinding energy consumption and improve the grinding effect. And fully consider the addition of help. The effect of grinding agent on the properties of grinding material (slag and clinker), through the design of grinding test, the grinding effect of the ceramic grinding body in cement clinker and slag is completely obtained. The actual production is carried out and the actual application of the ceramic grinding body is analyzed. The following main research has been obtained. Results: 1. by comparing the grinding effect of ceramic lapping body (ball) and metal grinding body, after the use of ceramic grinding body, the cement clinker 45 mu m sieve residual and 80 mu m sieve residue decreased, the specific surface area increased, the 3D strength and the 28d strength increased to the highest 27.6MPa and 52.1MPa; the slag 45 mu m sieves and 80 mu m sieves were reduced, the specific surface area was increased, 7d activity and 28d activity were highest. Up to 88% and 102%, after the use of special grinding aids for ceramic abrasives, the data also improved, indicating that the grinding effect of ceramic balls for cement clinker and slag grinding.2. by comparing ceramic balls and ceramic columns, cement clinker and slag of 45 mu m sieves and 80 mu m sieves with ceramic columns, specific surface area, cement 3D strength and 28d The strength, mineral powder 7d and 28d activity data are better than the data of ceramic ball grinding, indicating that the grinding effect of the ceramic column is better than the grinding effect of the ceramic ball,.3. is tested by using the new ceramic grinding section, the effect of grinding cement and clinker is best. The grinding effect is the best, the fineness, the surface area and the strength data are better. Because the ceramic grinding body is weak in breaking ability and the abrasive ability is strong, the small particle size lapping body can give full play to its grinding effect. In the design gradation, the small specific proportion of the particle size and the large proportion of the particle size are less. Compared with the metal grinding body, the ceramic grinding body is compared with the metal grinding body. The electric ratio is 35.5%, which proves that the ceramic grinding body has the power saving effect.4. through the mill grinding slag test. After replacing the ceramic abrasive, the data conforms to the control index, which is superior to the grinding effect of the metal grinding body. After half a year, the efficiency and performance are stable and the electricity saving effect is obvious.
【学位授予单位】：济南大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ172.63

【参考文献】