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为改善铬刚玉浇注料的抗热震性能而又不显著降低其强度,在铬刚玉浇注料中加入了氧化锆微粉,采用弹性模量测定仪、X射线衍射仪、扫描电镜和压汞仪等研究了氧化锆微粉对浇注料烧结性能及抗热震性能的影响.结果表明:氧化锆微粉可促进铬刚玉浇注料的烧结.当氧化锆微粉掺量在1%~3%(质量分数,下同)时,可提高浇注料的抗热震性能且不降低材... 相似文献
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目前,刚玉质浇注料大多含有硅微粉,这影响了浇注料的高温性能,不能适应某些特殊使用条件的要求。为了提高刚玉质浇注料的高温性能,国内外学者研究了将刚玉浇注料系统中SiO2取消[1-3],通过将浇注料体系矿物相组成由Al2O3-CaO-SiO2三元系统变为Al2O3-CaO二元系统,利用Al2O3和CaO高温下反应生成CA6而获得高的高温性能。本试验特研究了纯Al2O3-CaO体系浇注料高温抗折强度的影响因素,并为进一步提高刚玉浇注料的性能提出一点看法。 相似文献
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1浇注料的品种
在阿联酋UCC公司现场使用的浇注料多达9个品种,不同的部位采用性能不同的浇注料,见表1。 相似文献
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分散剂对耐火浇注料性能的影响 总被引:1,自引:0,他引:1
对具有特殊性能耐火浇注料的要求越来越高,这样使技术保持着持续发展.目前对水硬性粘结料已有广泛了解.高氧化铝水泥仍然为浇注料的最重要的水硬性粘结料.不过,钙铝浇注料仍然表现出中温强度降低的特征,可能是受到浇注料化学添加剂的影响.因此,本文的目的是研究分散剂对具有烧成温度的耐火浇注料性能的影响. 相似文献
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含碳浇注料因碳材料的水润湿性差及高温氧化引起的材料性能差等问题一直备受关注。分别以热氧化石墨、ZrC包覆改性石墨和水热碳化生物质碳材料为碳源制备铝碳浇注料,研究不同碳材料对铝碳浇注料显气孔率、物理性能、物相组成,以及抗氧化性和抗渣侵蚀性能的影响。结果表明:引入热氧化石墨的浇注料具有最高的加水量,残留孔隙破坏了材料内部结构,浇注料机械性能较差;添加ZrC表面改性石墨可以降低浇注料的加水量,抗氧化性能较好,但对力学性能的提升无显著影响;以生物质碳材料为碳源可以显著提高浇注料的物理性能,相比于添加石墨的试样,生物质碳材料并未显著提升试样的抗渣侵蚀性能。 相似文献
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以高纯莫来石、碳化硅、SiO2微粉、Al2O3微粉、纯铝酸钙水泥、白刚玉细粉和球沥青等为原料,研究了q值为0.23、0.25、0.27、0.29和0.31时湿式喷射浇注料的流变性能;进一步研究了q值为0.27时,SiC加入量(质量分数分别为12%、15%、18%、21%)对其流变性能、常温物理性能和高温抗折强度、抗热震性能、抗渣侵蚀性能的影响。结果表明:根据Andreassen方程,当q=0.27时,配制的浇注料具有较好的流变性能;加水量为6.5%(w)时,研制浇注料的流变性能类似于宾汉姆流体,适于管道输送;SiC加入质量分数为18%时,浇注料具有较高的高温抗折强度、抗渣侵蚀性能和抗热震性能;经对鱼雷罐和出铁沟的喷补使用证明,研制的湿式喷射浇注料施工性能好,使用性能优异。 相似文献
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ZHOUXianxin MichelRIGANU ZHOUNingsheng 《中国耐火材料》2004,13(3):25-34
Water addition has direct impact on castables and needs to be under control placement and properties, In this work, two rheological properties, flow resistance and torque viscosity, have been measured against time, with different water addition in the same bauxile-based LC Castable mix. The flow resistance indicates the mobility, whereas the torque viscosity dictates the stability of a castable during installation. It has been observed that with 6.0 wt% water addition, such a mix possesses good vibration castable characteristics; with 6. 5 wt% , it shows good self-flow castable characteristics; and with 7.0wt%, it can be a good pumpable castable, in every case with comparable mechanical properties. While with 7.5wt% water addition, the properties of such castable ared efinitively impaired. 相似文献
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1PrefaceWith the amplification of volume in blast furnace,longer service life of main iron runner is necessary toreduce the cost of pig iron,and to improve the workingcondition of blast furnace operators.The castable usedin iron runner is mostly the Al2O3… 相似文献
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Alumina-spinel castable has excellent refractory properties, including high volume and thermal stability, good hot strength, and excellent resistance against corrosion, erosion, and thermal spalling. Excellent refractory properties have made it a preferred lining for steel ladles, reducing the erosion and corrosion of molten metal and slag and improving the ladle life and efficiency for decades. These castables are also significant for the replacement of chrome-bearing refractories that cause several health hazards. The current review paper covers preformed and in situ spinel containing alumina castables. It focuses on the importance of these castables in the sidewall and bottom portion of the steel ladle in detail, the effect of spinel and MgO content, and the factors affecting castable properties. The review also covers the final properties of castable and the application areas of alumina-spinel castable in steel ladle, purging plugs, and RH-degasser. 相似文献