共查询到19条相似文献,搜索用时 156 毫秒
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叶蜡石无碱玻纤配合料的熔化及熔制过程的物理化学变化 总被引:3,自引:2,他引:1
在无碱玻纤的生产中,从配合料进入池窑到拉出无碱玻璃纤维经历了熔化、澄清、均化、热调节、拉丝五大生产环节,这些环节既相互联系又相互制约,任何一个环节出问题都会影响拉丝的产量和质量。熔化的过程是把好无碱玻纤产质量关的第一道关键工序。配合料的熔制过程本质上是把存在于配合料中的多种矿物原料(或称多元固体系)在高温的作用下变成均化的玻璃的过程。 相似文献
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低铝叶蜡石生产无碱玻璃球探讨 总被引:2,自引:0,他引:2
目前,我国无碱玻纤行业普遍采用叶蜡石作为引入Al2O3成份的原料,对于叶蜡石的成分有较为严格的要求,特别是对Al2O3的含量,过去一直要求25%以上,但后来高品位叶蜡石越来越少,现在使用叶蜡石其 Al2O3含量在20%-23%之间。 相似文献
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对我国叶蜡石资源储量、分布特征、现状、矿石特性等作了简要概述,分析了我国玻璃纤维产业近十年的发展情况,介绍了叶蜡石在玻璃纤维行业中的应用现状,并对我国叶蜡石在玻璃纤维行业的发展趋势作出展望,提出了多矿点配矿、加强叶蜡石选矿除铁工艺、建立专业化标准化玻纤原料生产基地的发展建议. 相似文献
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池窑生产E-玻璃纤维主要用单元窑熔化玻璃,一座年生产能力为4000~5000吨的无碱池窑其液面高度一般为600mm,熔化温度为1550~1600℃,熔化能力每平方米0.7~0.9吨的玻璃液.为了提高E-玻璃池窑的熔化能力和玻璃的均匀性,池窑中普遍采用鼓泡器,早先在我国上海耀华玻璃厂中碱池窑中使用,近年来南方玻纤制品有限公司和珠海玻璃纤维厂全套引进无碱纤维生产技术,鼓泡技术便得到了合理应用. 相似文献
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中碱玻纤是我国玻纤工业的主要产品,虽然电性能不及无碱,但它具有许多无碱纤维所没有的特点,如产量大、价格低,特别是它的后期耐水、耐腐强度都高于无碱纤维,作者认为在玻璃钢造船方面有很大潜力.为此提出,应积极发挥中碱玻纤的特点,扩大中碱玻纤在玻钢造船中的应用,以推动玻钢造船工业的发展. 相似文献
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通过管道抗挠曲等实验,分析了涤纶网格布对管道的界面强度、浸润性以及外观上存在的种种不足。同时,也表明了在玻璃钢加砂管道中应用无碱玻纤网格布具有良好的性能优势。提出了以无碱玻纤网格布替代涤纶网格布,并加以推广应用的建议。 相似文献
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在无碱玻璃纤维池窑拉丝生产过程中,从原料选择、配合料制备、窑炉熔化到纤维成型,影响拉丝作业的因素有很多,笔者根据本厂玻纤池窑生产的实践经验,就有关因素作一简单介绍,与同行交流。 相似文献
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Nanako Ueda Miroslava Vernerová Jaroslav Kloužek Pavel Ferkl Pavel Hrma Tetsuji Yano Richard Pokorný 《Journal of the American Ceramic Society》2021,104(1):34-44
Understanding the batch-to-glass conversion process is fundamental to optimizing the performance of glass-melting furnaces and ensuring that furnace modeling can correctly predict the observed outcome when batch materials or furnace conditions change. To investigate the kinetics of silica dissolution, gas evolution, and primary foam formation and collapse, we performed X-ray diffraction, thermal gravimetry, feed expansion tests, and evolved gas analysis of batch samples heated at several constant heating rates. We found that gas evolving reactions, foaming, and silica dissolution depend on the thermal history of the batch in a similar manner: the kinetic parameters of each process were linear functions of the square root of the heating rate. This kinetic similarity reflects the stronger-than-expected interdependence of these processes. On the basis of our results, we suggest that changes in furnace operating conditions, such as firing or boosting, influence the melting rate less than what one would expect without consideration of batch conversion kinetics. 相似文献
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采用高能球磨、喷雾干燥联用工艺制备了干燥分散的板片与球形叶蜡石粉体,并对所制备的粉体进行了粉晶X射线衍射(XRD)与场发射扫描电镜(FE-SEM)测试。 结果表明:叶蜡石粉体在初步研磨后,叶蜡石的晶型与层状结构特征未发生改变。经喷雾干燥可得到分散的单层叶蜡石纳米板片,板片厚度约为(8±2) nm,其在长轴方向上的粒径大小为0.2~1.2 μm。粉体在较长时间的研磨后,经喷雾干燥可获得均匀粒径的准球形叶蜡石聚集体,单个聚集体微粒直径约2.5 μm,且该聚集体由长径在纳米尺度上的叶蜡石板片团聚而成。此外,XRD测试结果表明喷雾干燥对叶蜡石粉体的晶型并没有明显的影响。 相似文献
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The properties of concretes containing various waste E-glass particle contents were investigated in this study. Waste E-glass particles were obtained from electronic grade glass yarn scrap by grinding to small particle size. The size distribution of cylindrical glass particle was from 38 to 300 μm and about 40% of E-glass particle was less than 150 μm. The E-glass mainly consists of SiO2, Al2O3, CaO and MgO, and is indicated as amorphous by X-ray diffraction (XRD) technique. Compressive strength and resistance of sulfate attack and chloride ion penetration were significantly improved by utilizing proper amount of waste E-glass in concrete. The compressive strength of specimen with 40 wt.% E-glass content was 17%, 27% and 43% higher than that of control specimen at age of 28, 91 and 365 days, respectively. E-glass can be used in concrete as cementitious material as well as inert filler, which depending upon the particle size, and the dividing size appears to be 75 μm. The workability decreased as the glass content increased due to reduction of fineness modulus, and the addition of high-range water reducers was needed to obtain a uniform mix. Little difference was observed in ASR testing results between control and E-glass specimens. Based on the properties of hardened concrete, optimum E-glass content was found to be 40-50 wt.%. 相似文献
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Pedro J. Sánchez-Soto Isabel Sobrados Jesús Sanz José L. Pérez-Rodríguez 《Journal of the American Ceramic Society》1993,76(12):3024-3028
The thermal transformation of pyrophyllite was analyzed using 27-Al and 29-Si MAS-NMR spectroscopies, thermal analysis (DTA-TG), dilatometry, and X-ray diffraction techniques. Above 800°C, dehydroxylation of pyrophyllite is the origin of a broad component in the 27-Al NMR spectra which is associated with a distorted pentahedral coordination of Al. At 1000°C, tetrahedral sheet breakdown takes place and a partial segregation of amorphous SiO2 is detected by NMR spectroscopy. This process permits rearrangements of aluminum ions and favors the formation of small disordered nuclei of mullite. The 27-Al NMR signals observed at 59.5, 40.7, and 1 ppm have been assigned to 4- and 6-coordinated Al in mullite, and the 29-Si NMR signals observed at −110 and −88 ppm are assigned to well-crystallized mullite and cristobalite, respectively, formed during thermal decomposition of pyrophyllite. 相似文献