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1What is refractory?
2Classification of refractory materials
3Often used refractory materials
4Refractory products divided into several categories?
1, 2 high aluminum products, mullite products, 3 products, 4 products 5 siliceous clay, magnesium products 6, carbon products, 7 products, 8 products of zirconium containing insulation  
5Physical properties of refractory materials

The physical properties of refractory materials including structural properties, thermal properties, mechanical properties, performance and operation performance. The structure and properties of refractories including porosity, bulk density, water absorption, air permeability, pore size distribution; and so on.

Thermal properties of refractories, including thermal conductivity, thermal expansion coefficient, heat capacity, heat capacity, thermal conductivity, thermal emissivity; mechanical properties of refractories, including compressive strength, tensile strength, bending strength, torsional strength, shear strength, impact strength, wear resistance, creep resistance, adhesive strength, elastic modulus etc..

Zibo Yunneng kiln technology, founded in 1985, is located in the refractory raw material base, is a professional engaged in unshaped refractory materials and insulation materials manufacturers, the main products are high alumina brick, clay brick, phosphate bonded refractory brick, circulating fluidized bed boiler supporting wear-resistant brick, high strength wear-resistant insulation casting the material, refractory castable, insulation bricks, high aluminium aggregate, hard clay clinker, and unshaped refractory materials, complete varieties, excellent quality and low price         refractory performance including refractoriness, refractoriness under load, heavy burning line change, thermal shock resistance and slag resistance, acid resistance, alkali resistance, hydration resistance, resistance to CO, conductivity, oxidation resistance etc..      

         The operation of refractories, including consistency, slump, fluidity and plasticity, cohesiveness and resilience, condensation, sclerosis etc..

6Special refractory materials and traditional ceramics and refractory materials are different?

        特种耐火材料是在传统的陶瓷和一般耐火材料的基础上发展起来的新型无机非金属材 料。它具有以下特性:高熔点、高纯度、良好的化学稳定性和热震稳定性。  

        特种耐火材料包括高熔点氧化物和难熔化合物及由此衍生的金属陶瓷、高温涂层、高温纤维及增强材料。    

        与传统的陶瓷和耐火材料相比,特种耐火材料纯度高、熔点高,电、热、机械和化学性能好,因此,可用于高、精、尖科技中;在制造工艺方面,原料一般要经过预烧。

        成型除传统方法外,还采用气相沉积、热压等新工艺。成型料为微米级微粉料,烧成需在很高温度下及保护气氛中,可制成薄型制品(呈半透明状)。


7What is an amorphous refractory? What are its characteristics?

        不定型耐火材料是由合理级配的粒状和粉状与结合剂共同组成的不经成型和烧成而直接使用的耐火材料。 


8There are many kinds of refractory materials, which are classified as follows:

        按工艺特性分类:浇注料,可塑料,捣打料,喷射料,投射料,火泥,涂抹料。 

        按原料材质分类:硅质,粘土质,高铝质,镁质,白云石质,铬质,含铬质等。   

        按结合剂品种分类:水玻璃结合,铝酸盐水泥结合,硅酸盐结合,焦油沥青结合,酚醛树脂结合等。  也有按使用部位分的。 

9How to bond refractory materials?  

    (1) 硅酸盐类——硅酸钙水泥、水玻璃、结合粘土等。  

    (2) 铝酸盐类——普通铝酸钙水泥、纯铝酸钙水泥、铝酸钡水泥等。  

    (3) 磷酸盐类——磷酸、磷酸二氢铝、三聚磷酸钠、六偏磷酸钠、铝铬磷酸盐类。      

    (4) 硫酸盐类——硫酸镁、硫酸铝、硫酸铁等。      

    (5) 氯化物类——氯化镁、氯化铁、聚合氯化铝等。      

    (6) 溶胶类——硅溶胶、铝溶胶、硅铝溶胶等。     有机结合剂:      

            (1) 天然有机物——淀粉、糊精、阿拉伯树胶、纸浆废液、焦油、沥青、海澡酸钠等。      

            (2) 合成有机物——环氧树脂、线性酚醛树脂、甲阶酚醛树脂、聚苯乙烯、硅酸乙酯、聚胺脂树脂等。      按结合剂硬化条件分类:      

    

            (1) 水硬性结合剂——硅酸盐水泥、铝酸盐水泥等。      

            (2) 气硬性结合性——水玻璃加氟硅酸钠、磷酸或磷酸二氢铝加氧化镁、氧化硅微粉加铝酸钙水泥等。      

            (3) 热硬性结合剂——磷酸、磷酸二氢铝、甲阶酚醛树脂等。     按不同温度下结合作用分暂时性和永久性结合剂。     暂时性结合剂:     

    

            (1) 水溶性结合剂——糊精、粉状羧甲基纤维素、粉状及液状木质素磺酸类材料、聚乙烯乙醇粉状晶体等。      

            (2) 非水溶性结合剂——硬沥青类、石蜡、聚丙烯类等。     永久性结合剂:     

     

            (1) 炭素结合剂——焦油沥青,酚醛树脂等。      

            (2) 铝酸盐水泥。      

            (3) 硅酸盐结合剂——水玻璃、硅酸乙脂等。      

            (4) 磷酸及磷酸盐结合剂。      

            (5) 氯化盐和硫酸盐结合剂。     

10How many types of binding agents have?

    (1) 水化结合――借助于常温下结合剂与水发生水化反应生成水化产物而产生结合。      

    (2) 化学结合――借助于结合剂与硬化剂,或结合剂与耐火材料之间在常温下发生化学反应,或加热时发生化学反应生成具有结合剂作用的化合物而产生结合。  

    (3) 聚合结合――借助于加催化剂或交联剂,使结合剂发生缩聚形成网络状结构而产生结合强度。  

    (4) 陶瓷结合――系指低温烧结结合,即在散状耐火材料中加入可降低烧结温度的助剂或金属粉末,以大大降低液相出现温度,促进低温下固一液反应而产生低温烧结结合。      

    (5) 粘着结合――是借助于如下几种物理作用之一而产生结合的。 

            1)物理吸附作用:依靠分子间的相互作用力――范德华力而产生结合的; 

            2)扩散作用:在物质分子热运动的作用下,粘结剂与被粘结物的分子发生相互扩散作用,形成扩散层,从而形成牢固的结合; 

            3)静电作用:粘结剂与被粘结物的界面存在着双电层,由双电层的静电引力作用而产生结合。  

    (6) 凝聚结合――依靠加入凝聚剂使微粒子(胶体粒子)发生凝聚而产生结合。 也有按使用部位分的。 

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