共查询到19条相似文献,搜索用时 125 毫秒
1.
阐述了搪瓷反应釜在聚乙烯醇缩丁醛生产中的腐蚀现象及腐慢机理,通过对搪瓷反应釜多种修补材料进行综合比较,重点介绍了美国邦公司新材料贝尔佐纳在搪瓷釜修补中的作用方法及效果。 相似文献
2.
3.
介绍了聚四氟乙烯塑料和不锈钢螺栓组合修补法在高温强腐蚀介质下搪瓷反应釜中的应用实例,并对其经济性、实用性作了概述。 相似文献
4.
<正> 搪瓷反应釜的修补,是化工生产中常常碰到的一个难题。笔者在长期的化工生产实践中,探索和积累了一些行之有效的修补方法和经验。本文就化工生产上较感辣手的氧化酸及稀酸介质搪瓷反应釜的修补作一粗浅介绍。 相似文献
5.
简述了搪瓷反应釜的制作与损坏机理,探讨了搪瓷反应釜的修补方法,如用活性剂、稀释剂及预应力施工工艺等方法。生产实践证明,这些方法修理成本低,见效大,可大大降低生产成本。 相似文献
6.
7.
阐述了搪瓷反应釜的破裂原因及粘接修复工艺过程。通过破裂原因分析,加工过程中的缺陷及使用过程中温度、机械冲击等原因极易造成搪瓷反应釜的腐蚀破裂。搪瓷反应釜经过乙酸乙酯清洗、砂纸打磨及重铬酸钠-浓硫酸溶液处理后,表面清洁,浸润性良好,而后选用环氧-酚醛胶进行胶接。涂刷环氧-酚醛胶和无碱无蜡玻璃布贴敷相互交替操作,一般2~5次,然后80℃/2h+150℃/2h阶梯式固化,完成搪瓷反应釜的胶接修复工艺。最后通过水压法和电火花检测仪进行胶接质量检测,胶接修复效果良好。 相似文献
8.
9.
10.
介绍了CPVC生产过程中的重要设备搪瓷反应釜的损坏原因,并从工艺控制角度分析了延长搪瓷反应釜使用寿命的方法。 相似文献
11.
根据搪瓷反应釜应用实例,介绍了搪瓷反应釜在使用中可能出现的安全隐患,以及为防止这些问题的出现采取的措施.同时对安装、应用、检验等环节如何确保搪瓷反应釜使用安全进行了探讨. 相似文献
12.
分析了搪瓷反应器损坏的原因,并提出了相应的修补方法。实践证明,经修补过的搪瓷反应器延长了使用寿命,减少了不必要的损失。 相似文献
13.
14.
简述了高真空扩散泵油275^#的生产工艺,分析了水解釜材质和精馏系统存在的问题,提出了改造意见,并比较了改造效果。结果表明,将水解釜材质由搪瓷更换成不锈钢后,既节约原材料消耗,又减少水洗过程中的物料损失和排污量,从而大幅度降低了产品的生产成本;精馏系统装置经过改造后,产品中的三甲基五苯基三硅氧烷含量比改造前生产的产品高出15个百分点,提高到84%以上;且产能翻一番。 相似文献
15.
16.
Ker-Kong Chen Chau-Hsiang Wang Chun-Chan Ting 《Journal of Adhesion Science and Technology》2016,30(20):2277-2288
This study aimed to evaluate the bond characteristics of 6-MHPA monomer-based primer in a temporary tooth coating material set (BeautiCoat, Shofu, Kyoto, Japan), applied to various conditioned enamels. The buccal enamel of thirty premolars was ground flat and the teeth were divided into six groups. This research bleached two groups, acid-etched two groups, and did not condition the remaining two groups. BeautiCoat primer was applied alone, or with activator on the ground and bleached enamel. BeautiCoat primer and FL-Bond were applied on the acid-etched enamel. FL-Bond adhesive on acid-etched enamel served as the control. BeautiCoat flowable resin was then piled on the enamel surfaces and light-cured. The microtensile bond strength (μTBS) was measured and the superficial demineralization, the resin–enamel interface, and failure mode were evaluated with a scanning electron microscope. The μTBS obtained in the non-acid-etched groups was more than half of that obtained in the acid-etched groups (p < 0.05). FL-Bond adhesive on acid-etched enamel showed the highest μTBS values. Marked improvements in μTBS were not observed when activator was combined with primer. No significant difference in μTBS could be found between BeautiCoat primer and FL-Bond adhesive on acid-etched enamel, or among BeautiCoat primer applied with/without activator on the ground and bleached enamel. The cohesive enamel failure ratio was low with the BeautiCoat primer or in the primer and activator groups but high in the FL-Bond group. The adhesive of BeautiCoat provided favorable bond strength with minimal risk of damage to the enamel. 相似文献
17.
《Ceramics International》2023,49(6):9493-9501
The influence of bentonite as a suspending agent on the processing and performance of the final enamel product was studied with the aim of prolonging the service life of enamel. The suspension stability of the glaze slurry was also evaluated, and the influence of the layered structure of bentonite on the suspension was explored. In addition, the effect of bentonite on the flexural strength and fracture toughness of enamel coatings on metal substrates was investigated. Finally, acid corrosion resistance experiments were performed to evaluate the effect of bentonite on the corrosion performance of the enamel coating. The results showed that the stability of the glaze slurry and mechanical properties of the enamel products were significantly improved by adding 1 wt% bentonite to the glaze slurry. The addition of 0.5 wt% bentonite was optimal for enhancing the acid corrosion resistance of the enamel. This study provides a useful reference for improving the quality of enamel products and prolonging their service life. 相似文献
18.
简述当前国内外搪瓷行业生产中传统设备的生产状况,在具体介绍传统设备在搪瓷生产中存在的生产效率低、质量差、能耗高、柔性差等诸多不足的基础上,通过具体案例,介绍了自动化、信息化、智能化设备目前在部分搪瓷产品生产中的应用,综合对比了传统设备与智能化设备在搪瓷生产中的差异,详细研究了智能化设备在搪瓷行业生产中所具有的精密化、自动化、信息化、柔性化、图形化、智能化、可视化、多媒体化、集成化、网络化、数字化等优点,最后分析并指出,在当前国际"互联网+"及"工业4.0"的发展潮流中,智能化设备在搪瓷行业中的发展趋势。 相似文献
19.
P. DEKKER 《Journal of the American Ceramic Society》1965,48(6):319-327
A procedure was developed for relating the speed of flow of enamel on an inclined plate to the viscosity-temperature curve of the enamel. The results of the flow-button test are represented in three-dimensional flow diagrams. An equation was developed for the calculation of the viscosity-temperature curves of twelve types of enamels. The equation includes a constant Q , having a value of 2.565, for flow of enamel samples on a plate inclined at 45°. Application of this method as a control for enamel melts is demonstrated. The influence of overmelting and undermelting on the viscosity of the enamel at different temperatures was examined. 相似文献