干法制粉在陶瓷外墙砖生产中的应用探讨
发布时间：2018-11-24 20:45
【摘要】：干法制粉技术是一种能够大幅度降低能源消耗、减少粉尘排放、降低陶瓷生产成本以及提高环保水平的陶瓷制粉工艺,具有非常好的发展前景。因为对干法制粉技术的研究还不是很充分,还有一些技术问题没有得到很好解决,目前尚未将其作为主流的制粉工艺。本文主要对干法制粉技术在陶瓷外墙砖的生产应用上进行探讨,为干法制粉技术最终能应用于实际生产提供参考。对影响干法制粉生产的陶瓷砖性能的各种因素进行了正交试验。用陶瓷坯体干燥强度、烧成后产品的断裂模数、破坏强度和吸水率对实验结果评价。根据正交实验结果的极差分析,排列出影响陶瓷坯体性能因素的主次顺序,并用方差分析确定因素的显著性水平。结果显示,在粘土含量、造粒干燥后颗粒的含水率、压机压力这三个因素中,粘土含量是最显著因素,对陶瓷砖性能影响最大。不同晶相粘土对干法制粉技术生产的粒子和陶瓷坯体性能的影响不同。可塑性高的粘土其陶瓷砖坯体干燥强度高。实验表明,干法粉碎各种原料的粉体到同一细度后,再通过混合制备坯料,其颗粒流动性较差,颗粒级配也达不到理想要求。通过单独球磨粘土原料,使粘土在水和研磨力的同时作用下得到充分粉碎,并以加入粘土浆的形式代替水进行干法制粉,可以提高干法制粉颗粒流动性和改善颗粒级配。本实验研究发现,如果粉碎后粘土颗粒与其他原料的颗粒度相当,则粘土颗粒可能成为粘附其它瘠性料的“中心”,造粒后颗粒表面以瘠性料为主。如果粉碎后的粘土颗粒尺寸远小于其他原料,则大比表面的粘土可能能够“包裹”其他原料颗粒,各种瘠性原料能够通过“包裹层”的粘土粘结,造粒后颗粒的外表面以粘土为主。最后得到陶瓷坯体干燥强度到1.35MPa、成品吸水率为2.85%时,其断裂模数和破坏强度分别达到31.74MPa和922.9N。论文还比较了不同含量和不同组分粘土对陶瓷坯体综合性能值的影响,含20%以上C10-1粘土应用干法制粉得到的坯体及产品符合生产标准。论文最后从生产工艺流程、标准能耗量对干法制粉技术与喷雾干燥技术进行了对比,干法制粉工艺不仅占地面积小,而且应用本文的试验方法相对节能35.2%。
[Abstract]:Dry powder technology is a kind of ceramic powder technology which can greatly reduce energy consumption, reduce dust emission, reduce the cost of ceramic production and improve the level of environmental protection. It has a very good development prospect. Because the research on dry powder technology is not enough, and some technical problems have not been solved well, it has not been taken as the mainstream pulverizing technology at present. This paper mainly discusses the application of dry powder technology in the production of ceramic outer wall tiles, which provides a reference for the final application of dry powder technology in practical production. Orthogonal experiments were carried out on various factors affecting the properties of ceramic tiles produced by dry powder. The experimental results were evaluated by the drying strength of the ceramic body, the fracture modulus, the failure strength and the water absorption of the sintered product. According to the range analysis of the orthogonal experiment results, the primary and secondary order of the factors affecting the properties of the ceramic billet was arranged, and the significance level of the factors was determined by the analysis of variance. The results showed that clay content was the most significant factor among the three factors: clay content, moisture content of granulated and dried particles and press pressure, which had the greatest influence on the properties of ceramic tiles. The effects of different crystalline clay on the properties of particles and ceramic billets produced by dry powder technology are different. Clay with high plasticity has high drying strength of ceramic brick. The experimental results show that the particle fluidity is poor and the particle gradation is not up to the ideal requirement when the powder of various raw materials is pulverized by dry method at the same fineness and then the billet is prepared by mixing. By single ball milling of clay raw materials, the clay can be fully pulverized under the action of water and grinding force at the same time, and dry powder can be prepared by adding clay slurry instead of water, which can improve the particle fluidity and particle gradation of dry powder. It is found that if the particle size of the pulverized clay particles is equal to that of other raw materials, the clay particles may become the "center" of adhesion to other barren materials, and the surface of the particles will be dominated by barren materials after granulation. If the particle size of the crushed clay is much smaller than that of other raw materials, the clay with a large surface may be able to "wrap" other raw material particles, and various barren materials can be bonded through the "encased" clay, The outer surface of granulated particles is mainly clay. Finally, when the drying strength of the ceramic billet is 1.35 MPA and the water absorption ratio of the finished product is 2.85, the fracture modulus and the failure strength are up to 31.74MPa and 922.9Nrespectively. The effects of different contents and different components of clay on the comprehensive properties of ceramic billets were also compared. The billets and products containing more than 20% C10-1 clay obtained by dry powder met the production standards. In the end, the dry powder technology and spray drying technology are compared from the production process and the standard energy consumption. The dry powder process not only occupies a small area, but also saves energy by using the test method in this paper.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ174.76
本文编号：2354989
[Abstract]:Dry powder technology is a kind of ceramic powder technology which can greatly reduce energy consumption, reduce dust emission, reduce the cost of ceramic production and improve the level of environmental protection. It has a very good development prospect. Because the research on dry powder technology is not enough, and some technical problems have not been solved well, it has not been taken as the mainstream pulverizing technology at present. This paper mainly discusses the application of dry powder technology in the production of ceramic outer wall tiles, which provides a reference for the final application of dry powder technology in practical production. Orthogonal experiments were carried out on various factors affecting the properties of ceramic tiles produced by dry powder. The experimental results were evaluated by the drying strength of the ceramic body, the fracture modulus, the failure strength and the water absorption of the sintered product. According to the range analysis of the orthogonal experiment results, the primary and secondary order of the factors affecting the properties of the ceramic billet was arranged, and the significance level of the factors was determined by the analysis of variance. The results showed that clay content was the most significant factor among the three factors: clay content, moisture content of granulated and dried particles and press pressure, which had the greatest influence on the properties of ceramic tiles. The effects of different crystalline clay on the properties of particles and ceramic billets produced by dry powder technology are different. Clay with high plasticity has high drying strength of ceramic brick. The experimental results show that the particle fluidity is poor and the particle gradation is not up to the ideal requirement when the powder of various raw materials is pulverized by dry method at the same fineness and then the billet is prepared by mixing. By single ball milling of clay raw materials, the clay can be fully pulverized under the action of water and grinding force at the same time, and dry powder can be prepared by adding clay slurry instead of water, which can improve the particle fluidity and particle gradation of dry powder. It is found that if the particle size of the pulverized clay particles is equal to that of other raw materials, the clay particles may become the "center" of adhesion to other barren materials, and the surface of the particles will be dominated by barren materials after granulation. If the particle size of the crushed clay is much smaller than that of other raw materials, the clay with a large surface may be able to "wrap" other raw material particles, and various barren materials can be bonded through the "encased" clay, The outer surface of granulated particles is mainly clay. Finally, when the drying strength of the ceramic billet is 1.35 MPA and the water absorption ratio of the finished product is 2.85, the fracture modulus and the failure strength are up to 31.74MPa and 922.9Nrespectively. The effects of different contents and different components of clay on the comprehensive properties of ceramic billets were also compared. The billets and products containing more than 20% C10-1 clay obtained by dry powder met the production standards. In the end, the dry powder technology and spray drying technology are compared from the production process and the standard energy consumption. The dry powder process not only occupies a small area, but also saves energy by using the test method in this paper.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ174.76
【参考文献】
相关期刊论文 前3条
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2 翟富勤,李成波;增湿造粒机结构改进与工艺参数调整[J];陶瓷;1999年02期
3 ;生料与水泥均化技术[J];中国水泥;2003年04期
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