采用全套国产耐火材料的显像管玻璃池窑的使用状况

介绍生产显像管玻壳的池窑全部采用国产耐火材料砌筑,运行４年后窑炉各部位的侵蚀情况。检测结果表明：国产电熔ＡＺＳ砖完全可以用于显像管玻璃池窑的池壁和池底。     

彩色显像管玻璃熔窑用熔铸耐火材料使用性能和选材的研究

以显像管玻璃为实验对象，对熔铸锆刚玉耐火材料的玻璃相渗出温度，抗侵蚀，发泡率三大关键指标的适用性进行了试验研究。结果表明，显像管玻璃熔窑对熔铸耐火材料具有特殊使用要求，据此，提出了在线质量控制，均衡散热退火工艺等提高和稳定国产熔锆刚玉材料使用材料的技术途径。     

彩色显像管玻璃中的气泡

气泡是显像管玻璃生产中最主要的缺陷,本文主要论述了彩色显像管玻璃中气泡产生的原因,并对玻璃中气泡缺陷的分析、判定以及减少气泡缺陷的措施作了简要评述.     

采用全部国产耐火材料小型马蹄焰池窑熔制显像管玻璃的尝试

采用全部国产耐火材料小型马蹄焰池窑熔制显像管玻璃的尝试吴铃（广东东莞富祥玻璃制品有限公司５１１７３８）一、前言目前，国内生产黑白和彩色显像管玻璃池窑全部为中型横火焰池窑，而耐火材料几乎全部为进口产品，即使部分采用国产耐火材料，接触玻璃滚的电熔３３＃Ａ...     

玻璃液对耐火材料的侵蚀研究

玻璃熔窑中的耐火材料遭受连续侵蚀。因此，耐火材料的耐侵蚀性是玻璃生产厂家寻求的主要性能。侵蚀是溶解作用引起的，而溶解又深受对流和扩散过程的影响。     

熔窑耐火材料的侵蚀及产生的缺陷

1、引言在玻璃生产中,除了对耐火材料作为构筑材料而考虑其耐久性外,还须十分重视其对玻璃质量的影响.在此类情况下,对玻璃质量的影响主要是被侵蚀下来的耐火材料混入玻璃液中,使玻璃制品产生缺陷.缺陷主要为砂粒、节瘤及波筋等异物缺陷.可能直接影响玻璃质量的是池壁砖、窑底砖、     

彩色显像管玻璃中的结石

结石是玻璃中常见的缺陷之一,本文主要讨论了显像管玻璃中结石形成的原因,结石的分析和判定方法,并对如何减少显像管玻璃中结石作了简要分析.     

关于玻璃熔窑耐火材料侵蚀数据预测模型的发展

新开发的耐火材料侵蚀一维模拟模型可长期地用于玻璃熔窑预测。玻璃液与耐火材料接触边界附近的热辐射对预测耐火材料的侵蚀率具有重要的作用。尽管Rosseland的近似值运用于大量的玻璃熔窑模型，以便通过数值简化来分析辐射热的传递，[第一段]     

硼硅酸盐玻璃对耐火材料的侵蚀研究

主要针对熔制硼硅酸盐玻璃时对锆刚玉砖、镁砖、硅砖的侵蚀情况进行实验分析.为合理选择熔窑耐火材料提供参考.     

玻璃池炉数学模拟原理及其应用(下)

5玻璃池炉数学模拟的功能 5.1可以对耐火材料、玻璃成分、配合料成分变化所引起的玻璃液质量情况进行模拟 池炉内玻璃液的质量情况受到的影响因素众多.首先,配合料的粒度组成、碎玻璃与粉料的比率、粉料的化学成分等等均会影响配合料的熔化性能,从而影响池炉内玻璃液的熔化状况,最终在玻璃液质量上得到反映.其次,由于与玻璃液接触的耐火材料的导热性能、化学性能不同,玻璃液的温度场会发生变化,也将对玻璃液质量产生影响.     

Methods of determining the corrosion resistance of glass-tank refractories

Conclusions When laboratory investigations are being carried out to find resistant refractories for glass tank furnaces it is desirable to make simultaneous use of indirect and direct methods of assessing corrosion resistance.The use of indirect methods for determining corrosion resistance in refractories permits us to explain the nature of the interaction between the refractory and glass, to study the nature and properties of the reaction products, and also to select refractories that form with the glass the most infusible or viscous reaction products for subsequent investigation in molten glass.The direct methods permit direct determination of the rate of corrosion of refractories by glass at working temperatures and allow us to recommend the most corrosion resistant refractories for tests in service conditions.In laboratory conditions we established that the most corrosion resistant refractories in regard to original glass used for obtaining slag sitalls are bakor-33 and dense zirconium refractory. This may be explained by the formation of viscous reaction products in the contact layer which have a protective action on the refractory.Translated from Ogneupory, No. 5, pp. 56–60, May, 1967.     

Corrosion of refractory materials in iron-containing melts

The corrosion resistance of various refractory materials in an iron-containing glass melt is investigated. It is established that an increase in the melt temperature and iron concentration insubstantially affects the corrosion rate in KhATs-30 refractory but noticeably influences the rate of destruction of BK-33 refractory. The KhaTs-30 and Kor-95 refractories are shown to possess much higher corrosion resistance than the other investigated refractories.     

CaF2对硅质耐火材料的侵蚀

通过含CaF2 的颜色玻璃对硅质耐火材料侵蚀的研究及微观结构分析 ,认为 :由于颜色玻璃中CaF2 的引入 ,使玻璃中的Na2 O挥发增加 ,加快了硅砖的侵蚀 ;Na2 O是促使硅砖晶相转变的矿化剂 ,使硅砖内晶相发生重结晶和多晶转变并伴随体积变化 ,引起砖硅的组成、结构、使用性能的变化。CaF2 的引入 ,使硅砖侵蚀程度加重     

Enhanced corrosion resistance of magnesia-chrome refractories impregnated with zirconia sol

In order to enhance the corrosion resistance to molten vanadates and silicates of middle and upper checker bricks in glass furnace regenerator with petroleum coke as fuel, the present research improved the microstructure, compactness and corrosion resistance of magnesia-chrome refractories by vacuum impregnation with zirconia sol. The results show that the vacuum impregnation of zirconia sol and the increased impregnation times led to the significant increase in the bulk density and decrease in the apparent porosity of refractories, and the impregnated zirconia particles enhanced the corrosion and penetration resistance. The penetrated zirconia particles in the pores decreased the porosity and pore size of refractories, resulting in the inhibited penetration of vanadate and silicate liquid phases during the corrosion process. In addition, the zirconia particles around periclase particles also prevented the reaction between molten corrosion reagent and periclase, thus enhancing the corrosion resistance of refractories. The present study provides an effective method for improving the corrosion resistance of magnesia-chrome checker bricks in regenerator of glass furnace with petroleum coke as fuel.     

Andalusite: An amazing refractory raw material with excellent corrosion resistance to sodium vapours

The chemical attack of alumina refractories by sodium vapours is far from been completely understood. In order to contribute to a better knowledge of this attack, a laboratory test was developed to simulate the sodium gaseous corrosion of different raw materials and refractories.Corrosion of alumina raw materials by sodium vapours is due to a dissolution–precipitation process by a Na₂O rich liquid phase. The gaseous corrosion strongly depends on the microstructures and the assemblage of phases in alumina raw materials. Fire clay and andalusite raw materials exhibit very high corrosion by Na vapours. In spite of an initial high silica glass content, and as a result of trapping of the main part of the glass in the capillary network of the mullite composite crystal, mullitised andalusite leads to excellent corrosion resistance which is close to monocrystalline fused mullite.Consequently, The use of mullitised andalusite particles in the matrix of alumina refractories limits the liquid phase formation during corrosion by sodium gas. These experimental results are in agreement with thermodynamic calculations.     

Interaction of magnesium-containing refractories and melts of optical glass

The interaction of magnesium-containing refractory materials and optical glasses is considered. It is shown that in most cases such materials cannot be used in glass melting because their corrosion resistance is lower than in conventional refractories owing to the formation of stones and crystalline inclusions in the glass. It is possible to use magnesium-containing refractories for melting high-lead glass.     

Thermomechanical properties of fused and cast chrome-corundum refractories

Conclusions The thermomechanical properties and heat resistance of fused and cast chrome-corundum refractories, which are distinguished by their increased corrosion resistance to the action of the agressive gaseous medium in the production of glass, were investigated. On the basis of the investigations conducted the service properties of chrome-corundum refractories were determined and recommendations were made for selection of the optimum chemical composition of the fused and cast material in relation to service conditions.Translated from Ogneupory, No. 8, pp. 46–49, August, 1986.     

Review of corrosion of refractory in gaseous environment

Advancing high temperature technologies pushes the envelope of the service conditions to new extremes. However, corrosion of refractories substantially decreases the service life and causes unscheduled shutdown of manufacturing and processing plants. In this paper, corrosion of refractories in gaseous environments is reviewed. The corrosion mechanisms of alumina refractories, including alumino-silicates and zirconia as oxide, and silicon carbide as non-oxide refractory are emphasized due to their broad array of applications. It is shown that carbonaceous atmosphere and water vapor are detrimental for the oxide refractories. Interaction with water vapor leads to formation of the volatile species and subsequent recession of the refractories. Carbonaceous atmosphere leads to the decomposition of even mullite, which is categorized as neutral refractory due to its excellent thermochemical stability. Oxidizing atmosphere with water vapor dominates the corrosion of non-oxide refractories. Presence of impurities, even parts per million level, in the gas stream such as alkali vapor and halogens can alter the corrosion mechanisms and favor “hot corrosion.”     

全氧燃烧玻璃熔窑中电熔AZS砖侵蚀机理浅析

全氧燃烧与空气燃烧相比,燃烧产物中水蒸气的含量有很大的不同,这一差异改变了窑内的运行条件和玻璃液性质,加速了耐火材料的侵蚀.