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乌兰水泥集团有限公司(以下简称乌兰水泥)三线窑是由内蒙古建材设计院设计的日产熟料2500t的新型干法窑。于2005年1月15日建成峻工后点火.当年即达标达产。目前,该窑日产量基本在2750t左右.超出设计产量10%以上,f-CaO在0.3%加.7%之间,熟料28d抗压强度平均值57~58MPa.熟料标准煤耗约110kg/t.喷煤咀采用的是四风道喷煤咀(带拢焰罩),运转率基本上能稳定在93%以上。众所周知,影响回转窑运转率的关键工艺因素是窑内衬料的选材和各种耐火材料的优化配置。乌兰水泥三线经过1年半左右的生产实践.摸索出了一套比较适合本生产线的窑内衬料配套方案.使大窑的运转率有了较大提高,提高幅度达8%左右.从而为窑的优质、稳定奠定了有利条件。 相似文献
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Thermal conductivity measurements were made on many types of refractory brick including high-alumina, fireclay, silica, chrome, magnesia, forsterite, zircon, silicon carbide, and insulating brick. These measurements, made with a modified ASTM C 201–47 apparatus, covered mean specimen temperatures of 200° to 2000°F. The results are compared with other published data. 相似文献
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针对目前水煤浆耐火砖气化炉的实际运行情况,结合清华大学开发的第2代水煤浆水冷壁夹套气化炉在其他企业的改造成果,对水煤浆耐火砖气化炉进行改造,以拓宽原料路线、延长运行周期和提高综合运行效益。对耐火砖气化炉燃烧室部分进行相应改造后,运行安全性、稳定性提高,对煤种灰熔点要求降低,运行周期延长,产气量增加,经济效益显著。 相似文献
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Direct bonding in burned magnesite-chrome refractories is described as a mineralogical phenomenon and as a factor governing brick properties. Hot-load tests are recommended as a supplement to hot modulus tests to obtain a meaningful picture of high-temperature strength. The importance of purity of ingredients is thus made more apparent. Direct-bonded brick from open-hearth service are shown to have a lower level of slag absorption. The result was reproduced in a unique laboratory diffusion furnace and a relation between silicate buildup and original brick purity is established. 相似文献
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Possible reactions occurring in basic brick were first explored by studying ( a ) binary mixtures of sesquioxides or magnesia spinels and ( b ) three silicates, namely forsterite, monticellite, and di-calcium silicate. Compositions ranging from 10 to 90% of each constituent were pressed into cylinders and heated at 100°C intervals between 800°C and a maximum of 1700°C or until melting occurred. Bulk density and volume changes were recorded and X-ray diffraction was used to explore chemical reactions. Reactions between the three silicates and three chrome ores were also studied. Since the most refractory specimens were those containing magnesiochromite as the spinel constituent, the effect of free magnesia as a third component in these series was finally explored. 相似文献
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在1550℃下用坩埚法对2种不同化学组成的炉渣向镁质耐火砖中渗透的性状进行了研究,观察了渗透到镁质耐火砖中的炉渣的显微照片。在不含MgO的钙铝硅酸盐炉渣的渗透过程中,MgO颗粒与炉渣反应,结果在MgO颗粒和炉渣之间的界面上形成尖晶石。另一方面,在钙铝硅酸盐炉渣渗透过程中,尖晶石被过饱和,炉渣导致生成非均匀性晶核,结果在MgO颗粒上形成尖晶石,介绍了MgO和炉渣之间的这结不同形式的反应对炉渣渗透性状的影响。 相似文献
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Magnesite-chrome refractory brick that is heated to temperatures as low as 500°C undergoes premature degradation, with a significant decrease in mechanical properties. Results that are obtained by dilatometry, differential thermal analysis, thermogravimetry, differential scanning calorimetry, X-ray diffractometry, and water absorption indicate that superficial hydration of the periclase grains during storage causes such degradation. 相似文献
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最近10年来许多研究人员在碱性耐火材料方面最重要的任务之一就是如何不采用氧化铬,以保护环境和人的健康。但是还有一些领域尚未取代镁铬砖。因此,采取措施试图开发新型无铬碱性耐火材料。 相似文献
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德士古气化炉向火面砖的使用情况和寿命对气化装置的稳定运行至关重要,通过工业上向火面砖的实际使用情况,分析向火面砖使用寿命缩短的原因,探索出达到或超过向火面砖设计使用寿命的方法。 相似文献
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利用坩埚侵蚀实验,在1550℃下进行了铝硅酸钙渣对镁质耐火砖的侵蚀。根据对已侵蚀的镁质耐火砖的显微结构的分析,调查了在渣浸透过程中MgO颗粒的侵蚀性状。并且,应用相图,论述了MgO颗粒的侵蚀机理。其结论是MgO颗粒间接熔解于渣中,在镁质耐火砖之间的界面上生成了尖晶石相,所生成的尖晶石直接熔解于新流入砖内的渣中而消失了。 相似文献
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Samples of basic and alumina brick were examined after service in copper anode furnaces. Copper oxides penetrating the brick had reacted with the chrome grains, with the periclase, and with the alumina. These reactions were studied by examining the stability of the compounds formed when copper oxides were heated with various spinels and oxides. In general, spinels of the series CuO R2 O3 decomposed to the compound CU2 O R2 O3 with the liberation of R2 O3 , when R was Al3+ , Cr3+ , or Fe3+ . With magnesia, cupric oxide formed the mineral güggenit, CuO–MgO, which during heating decomposed with the evolution of oxygen to MgO and Cu2 O. 相似文献
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通过在水泥回转窑上的实际用例,介绍了新开发的尖晶石系无铬砖具有较好的挂窑皮附着性、耐熔损性和耐结构剥落性等性能,代替原来超高温烧成镁铬砖在水泥回转窑的烧成带和过渡带使用,取得了很好的使角效果。 相似文献
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为起草《炼钢转炉用耐火砖形状尺寸》冶金行业标准(YB/Th60-94)(下简称本标准),导出了大小端差距比为基础的转炉炉衬特殊尺寸参数计算式。用这些计算式定量地比较了当今国际标准、国外先进标准及国内外转炉炉衬结构中各种形状及尺寸砖的优缺点。本标准除体现了国际标准《氧气炼钢转炉用碱性砖》(ISO5019/6)单环等中间尺寸坚宽楔形砖、双楔形砖砌砖优点外,还有以下创新:(1)砖的尺寸系列更趋合理,并拓宽了应用范围;(2)国内外首次列入本标准的尺寸参数及基于尺寸参数的双楔形砖砖环、转量简化计算式,为本标准的设计计算提供精确数据,为其推广实施提供了方便条件;(3)采用本标准的武钢三座90t转炉的三年实践表明,它具有易于成型、制砖、砖的内在质量均一、砌筑操作方便、用后残砖剩余尺寸小且不掉砖及寿命延长30%以上等优点,使武钢转炉炉龄达到国内领先水平并进入国际先进行列,且经济效益显著。本标准由冶金部于1994年9月发布,1995年5月实施,标准水平等级为国际先进水平(Y)。 相似文献
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分解窑用碱性耐火材料的技术进展 总被引:4,自引:0,他引:4
介绍了水泥预分解窑的工况条件及其对窑衬耐火材料的影响,论述了世界水泥预分解窑的技术进展及其对窑用碱性耐火材料的要求,以及窑用碱性耐火材料的技术进展,分析了我国预分解窑生产技术的发展及预分解窑用耐火材料的发展,提出了中国预分解窑用耐火材料近期的发展趋势。 相似文献