聚乙烯醇丁醛生产中搪瓷釜的腐蚀与防护

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。     

搪瓷反应釜的应用与维修

分析了 KCl低温转化法生产硫基 NPK复合肥反应槽的腐蚀状况 ,介绍了搪瓷反应釜的应用及维护 ,并提出了采用有机高分子材料进行搪瓷修补的方法。     

高温强腐蚀介质下搪瓷反应釜的修补实例

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。     

搪瓷反应釜修补经验小结

<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。     

搪瓷反应釜损坏与修补的初探

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。     

用环氧树脂修补搪瓷反应釜

环氧树脂E－20用有机硅树脂进行改性后，配以适宜的增韧剂，填料及固化剂对搪瓷反应釜进行修补，修补后的搪瓷反应釜可耐300℃，且对除强氧化剂氯磺酸和硝酸外的其他酸碱有较强的抗蚀作用。     

搪瓷反应釜破裂的粘接修复工艺

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。     

高湿度对搪瓷设备粘补质量的影响与对策

在使用过程中,搪瓷反应釜等设备经常发生爆瓷现象,严重影响生产的进程和产品的质量。采用耐腐蚀高分子合金现场修补爆瓷的搪瓷设备,具有快捷、价廉等优点,是一种理想的修理方法。但由于化工生产工艺的特殊性,所使用的高分子合金要经受酸、碱介质的腐蚀,流(固)体物料的冲刷,以及     

搪瓷反应釜损坏与修补初探

初步分析了搪瓷反应釜损坏机理，介绍了几种本公司常采用的修补方法。     

延长水相法CPVC搪瓷反应釜使用寿命的控制要点

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。     

搪瓷反应釜的隐患及防护措施

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.     

搪瓷反应器损坏与修补的探讨

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。     

搪瓷反应釜内加装蛇管的改造

针对搪瓷反应釜冷却物料效果不佳的问题 ,在釜内加装冷却蛇管 ,改造后该釜使用效果较好     

高真空扩散泵油275^#生产工艺改进

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。     

食品添加剂明矾生产新工艺研究

介绍一种由氢氧化铝代替铝土矿生产食品添加剂明矾（十二水合硫酸铝钾）的新工艺。使用氢氧化铝与硫酸、硫酸钾在搪瓷反应釜内一步反应,再通过结晶、破碎、包装等工序,得到优质的明矾产品。解决了用铝土矿为原料生产明矾产品带来的重金属超标问题,并且大大缩短了工艺流程,减少了能源消耗同时杜绝了矿渣的产生。以氢氧化铝为原料生产食品添加剂明矾具有工艺流程短、环保、安全、产品质量好等特点。     

Bonding performance of a temporary tooth coating material to enamel

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.     

Effect of bentonite content on the suspension stability of a glaze slurry and final enamel performance

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.     

自动化、信息化、智能化设备在搪瓷行业中的应用及发展

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。     

Calculation of Viscosity-Temperature Curves for Porcelain Enamels from the Flow-Button Test

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.