关于堆透明熔块粉腰线的熔决裂纹的答疑

问：我厂是一家陶瓷工艺腰线花片厂，专门为瓷片生产厂家生产配套的腰线和花片。在煅烧堆透明熔块粉的腰线时，表面堆积的熔块存在细小裂纹，而且窑两边的腰线熔块出现裂纹的频率较大，但坯和釉却未见裂纹。请问，这是透明熔块粉的的问题还是辊道窑烧成控制不当造成的？     

关于堆透明熔块粉腰线的熔块裂纹的答疑

问:我厂是一家陶瓷工艺腰线花片厂,专门为瓷片生产厂家生产配套的腰线和花片。在煅烧堆透明熔块粉的腰线时,表面堆积的熔块存在细小裂纹,而且窑两边的腰线熔块出现裂纹的频率较大,但坯和釉却未见裂纹。请问,这是透明熔块粉的的问题还是辊道窑烧成控制不当造成的?答:贵厂的小型辊道窑是根据小产量、有时是间歇性生产的特殊工艺而设计安装的。透明熔块裂纹既可能与透明熔块粉本身有关,也可能与窑炉三带结构的设计和冷却过程的控制有关。(1)透明熔块粉堆在腰线上,入窑经750～900℃煅烧,在腰线面上形成透明玻璃熔体。熔块粉中的石英玻璃相含量越…     

BKX型高效选粉机在中小水泥企业圈洗粉磨系统中的应用

ＢＫＸ型高效选粉机在中小水泥企业圈洗粉磨系统中的应用李常安广西百矿股份有限公司设计科（５３３０００）１总论由于选粉设备在挖掘水泥工业的潜力方面，发挥了很大作用，而且技术日新月异。我厂研制开发的ＢＫＸ型高效选粉机，就是在传统旋风式选粉机机型的基础上改进...     

搪瓷层弹点缺陷分析

本文结合厂内多年生产、试验工作情况，对搪瓷底、面釉层出现弹点现象、起因及克服措施作了分析评述。其起因有：底釉熔制不透，熔块中气全和未熔化颗粒物多，灿中缺氧化剂而含C多，铁坯中含C、S过多，研磨介质、磨加物、铁坯等往釉浆内带入一些固体夹杂物以及尘土。克服办法主要是加强在选料、拌粉、熔粉、球磨、搪烧过程的技术管理。     

国外科技消息

釉用熔块连续干磨法据西德“国际陶瓷评论”1980年第三期报道,西德 Gebv.Pieiffer AG,Kaiserslautern 最近研究设计成功一种釉用熔块连续干磨系统。难于磨细的熔块釉长期以来一直是用球磨机进行湿法研磨,这是一种间歇式的生产方法。而采用新试制成功的干磨系统,可以     

搪瓷釉瓷熔块的静电包裹液、静电搪瓷粉及其制备方法

<正>本发明公开了一种搪瓷釉瓷熔块的静电包裹液、静电搪瓷粉及其制备方法,涉及搪瓷技术领域。静电包裹液,按重量份由以下物质组成:钛酸酯偶联剂0.002~0.01份、羧基改性硅油0.002~0.01份、硅烷偶联剂0.002~0.01份、工业酒精10~20份。静电搪瓷粉,包括搪瓷釉瓷熔块和静电包裹液,静电包裹液占搪瓷釉瓷熔块总重量的10%~20%,搪瓷釉瓷熔块经粉碎后与静电包裹液加水混     

联合粉磨系统的改进

联合粉磨系统是由预粉碎（粗碎）与粉磨（细磨）系统组成。预粉碎常使用辊压机、立磨等，粉磨常使用球磨机。生产表明，使用联合粉磨系统可提高粉磨效率。近期，为达到联合粉磨系统的最佳状态，进一步提高粉磨能力和粉磨质量，降低电耗，日本三菱水泥研究所对联合粉磨系统作了改进，其技术改进重点放在预粉碎系统的多级筛分级器上。     

国内大型生料辊磨的应用现状和技术分析

１ 前言 辊磨是应用料床粉磨原理粉磨物料的设备。５０年代以前，磨机规格较小，一般用于粉磨非硅质物料，如石灰石、煤等。６０年代，磨机规格扩大，推广至水泥生料的粉磨。７０年代，随着技术发展，液压加载代替了弹簧加载，使得辊磨在水泥生料粉磨系统得到广泛的应用。８０年代，逐步出现了作为预粉磨设备的辊磨和粉磨水泥熟料的辊磨。 辊磨集中碎、粉磨、烘干、选粉等工序于一体，流程简单，便于布置；应用料床粉磨原理，粉磨电耗低，仅为球磨的８０％～９０％，整个系统的单位生料电耗为球磨７５％～９０％；烘干能力强，可以进入大量…     

气流喷射磨超微粉碎ZrO2及助磨剂作用效果的研究

在气流喷射磨内重复粉磨ZrO2，对这种新型粉磨设备制备ZrO2微细粉的工作过程进行了研究。同时，粉磨过程中加入三乙醇胺助磨剂，在有助磨剂和无助磨的条件下进行了比较试验。结果表明，三乙醇胺对多次粉磨有助磨效果，可获得表面积更大、粒度分布更均匀的颗粒。     

关于旋风选粉机最佳循环负荷的探讨

在圈流粉磨系统中，选粉机虽然不起粉磨作用，但它可以将合乎要求的细物料及时选出，避免了过粉磨现象，提高了粉磨效率，从而提高磨机的产量，降低能耗及钢耗。一级圈流磨系统流程如图1。     

Compositional modifications to floor tile glazes opacified with zircon

Abstract

In the ceramic tile industry opaque glazes with considerable zircon content are widely used. However, the high cost of zircon limits its wide use in relevant glaze compositions. In the present study, a model opaque glaze was modified by changing the alumina/silica ratio, adding potassium oxide, or using a higher content of opaque frit while gradually eliminating the zircon content in the glaze batch. After glaze preparation, application, and single firing of glazed floor tiles under industrial conditions glazes were characterised by XRD, SEM, and EDX. The optimum alumina/silica ratio was found to be 0·26. Colour parameters L, a, and b of starting and final glazes showed that an increase in opaque frit content gives more positive improvement in opacity and in dry abrasion resistance than potassium oxide addition. Removal of zircon from the glazes resulted in a decrease of ～13–18% in glaze cost without detrimental effect on opacity.     

FACTORS AFFECTING REFLECTANCE*

A study was made to determine the factors that should be considered to get maximum reflectance with a given enamel. The increased reflectance obtained by fine grinding varies according to the kind of frit and opacifier used, and it was found that the proper combination of frit and opacifier is essential in developing effective reflectance. The writers conclude that the efficiency of the opacifiers varies according to the amount used; the method of blending the frits is an important factor; and the kind of clay used in the mill addition affects the degree of reflectance.     

环保型晶雕堆花装饰在高档骨质瓷中应用的研究

文中简要介绍了高档骨质瓷晶雕堆花装饰的特点,通过实验研究获得了适合晶雕堆花装饰的骨质瓷无铅坯釉配方,开发出了用于骨质瓷晶雕堆花装饰的无铅干粒釉和釉膏,介绍了高档骨质瓷晶雕堆花装饰的加工工艺过程。     

高效有机助磨剂

将掺合或不掺合有机助磨剂的锆英砂装入普通湿法球磨机中进行研磨,并将磨细的粉料混入卫生陶瓷轴料中烧成,对比测试结果显示,有机助磨剂的加入不仅大幅提高研磨效率,降低锆英砂粉料的最终细度,还能提高轴面白度。     

爆炸预处理锆英砂的试验研究

研究了锆英砂(ZrSiO_4)的爆炸预处理工艺。试验结果给出:(1)经爆炸处理的锆英砂,颗粒内部的微应变和微观缺陷显著增加;(2)经爆炸处理的锆英砂所需的研磨时间显著缩短;(3)经爆炸处理的锆英砂,化学活性和烧绪活性均有增加。这些结果表明,爆炸预处理陶瓷粉末技术是一项有发展前途的新工艺。     

Influence of firing temperature on the color developed by a (Zr,V)SiO4 pigmented opaque ceramic glaze

The analysis of the physical interactions between pigments, opacifiers and glazes is fundamental to understand the optical behavior of ceramic glazes. Furthermore is important to verify if the glaze devitrifies because the crystallized phases can contribute to the optical properties of the system. The size and the quantity of the formed crystals can change significantly the glaze color. The mean goal of this study was to evaluate the influence of firing temperature on the color stability of an opaque ceramic glaze colored by a blue vanadium–zircon pigment taking into account all the optical components. Quantitative X-ray diffraction analysis was conducted in order to evaluate the pigment dissolution at the three studied temperature and the quantity of the in situ formed zircon crystals from the used frit. The reported study demonstrated the importance to consider all the components in a multicomponent optical system as a ceramic glaze.     

砂带式磨光

介绍了砂带磨光的特点,说明了推广应用砂带磨光的必要性,对砂带磨光机的组成做了简单介绍;就砂带磨光的三种方式：接触轮式、支承板式、自由式的不同加工方法用图示给予较详细的说明;提供了不同材料工件用砂带磨光时砂带速度的参考数据。     

锆英石超细粉碎的试验研究

针对锆英石的超细粉碎，研究了助磨剂、煅烧、煅烧助剂对锆英石超细粉碎效果的影响，表明锆英石直接煅烧后，在助磨剂的作用下，取得了较好的超细粉碎效果。     

Effect of ZnO on Crystallization of Zircon from Zirconium‐Based Glaze

The promotion of zircon (ZrSiO₄) crystallization by ZnO from a zirconium‐based frit glaze was studied and the possible mechanism was discussed. X‐ray diffraction was used to analyze the relative quantities of zircon and other transitional crystals in the samples. The results show that ZnO can significantly decrease the crystallization temperature of zirconium‐based glaze, depress the formation of Ca₂ZrSi₄O₁₂, and promote the devitrification of transitional crystals t‐ZrO₂ and Ca₂ZnSi₂O₇, as well as lead to the formation of more zircon than the ZnO‐free glaze. It was also found that zircon not only can form from the interaction between t‐ZrO₂ and SiO₂ but also can devitrify directly from the glass phase of zirconium‐based glaze.