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陆纯煊 《中国建筑材料科学研究院学报》1990,2(1):71-78
本文回顾了水泥窑用耐火材料的发展简史,阐述了新型干法窑对耐火材料的基本要求和目前这种窑系统各部分实际使用的耐火材料。摈上来随着熟料煅烧以煤代油的变换,节能要求的提高,耐碱蚀和降低铬公害的需要,开发利用了低铬和无铬碱性砖,耐碱蚀、抗肃落、低导热的高铝砖以及超轻质的硅酸钙板和耐火浇注料,使窑衬的重量减轻,节能更多且寿命延长。本文对近年来已付之用的低铬镁铬砖、无铬镁质砖、白云石砖特种高铝砖、超轻质硅酸钙板和超轻质耐火浇注料的主要成分和性能加经阐述介绍。 相似文献
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我国研制的耐碱粘土砖、抗剥落高铝砖、高强耐火浇注料和隔热材料等,已能保证大型水泥企业预分解窑生产运行之需,完全可以取代相应的进口材料。由中国建材科研院耐火材料研究所和江苏省宜兴京津耐火材料联营公司研制、生产的 RS 型抗剥落高铝砖,是国家“七五”科技攻关12条龙中的2000t/d 水泥熟料窑外分解工艺线项目配套优质耐火材料研究成果,现正在引入3000~4000t/d 大型水泥窑中使用, 相似文献
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冶金工业部1993年科技进步奖共评出250项,其中耐火材料有14项获奖。 获一等奖的有:高炉用铝炭砖和组合砖系列产品。共2项。 获二等奖的有:高铝质热风炉砖、电炉喷补料、新型喉衬石墨。共3项。 获三等奖的有:轻质莫来石耐火浇注料、高纯高强刚玉砖、镁铝铬砖、大型干法水泥窑用优 相似文献
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大型干法水泥窑用碱性砖的开发与应用 总被引:2,自引:0,他引:2
采用高纯镁砂及合成原料,研制出大型干法水泥回转窑用直接结合镁铬砖、镁尖晶石砖、镁铝铬砖、镁锆钙砖等。在烧成带、过渡带使用,寿命可达一年左右。可以替代进口产品,实现大型干法水泥回转窑用耐火材料的优化配置和使用,可以满足环保要求,加快大型干法水泥窑用耐火材料无铬化的进程 相似文献
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耐火砖直接影响到窑的产量、质量和运行安全。新型干法窑高温带选用镁铬砖时,要重视Cr^6 带来的环城污染。建议选用白云石砖、夹晶石砖等无铬砖。 相似文献
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由于水泥回转窑使用的镁铬砖容易产生有害的六价化合物,导致环境污染。因此,在水泥回转窑的烧成带用无铬砖代替镁铬砖已成为一种发展趋势。白云石砖和高级白云石砖具有良好的抗蚀性和能形成稳定的窑皮,减少窑壳的散热损失,满足现代化旋窑对碱性窑衬的要求。本文在比较镁铬砖和白云石砖的基础上,提出在水泥回转窑中开发和应用白云石砖的必要性。 相似文献
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鲁 《墙材革新与建筑节能》2003,(9):27-27
为净化城市污水,每天会产生大量含有有害有毒物质的污泥。对于这类污泥如何处置呢?浙江大学开发出一种轻质节能砖,为这类污泥处置找到了新的有效途径。由浙江大学理工学院环境与生物地球化学研究所主持的浙江省重点项目《污水处理中污泥资源的开发与利用研究》,在通过大量实验研究获得各种技术参数的基础上,利用污泥资源具有热值较高和轻质的特点,成功开发出了一种轻质节能砖。这种轻质节能砖的放射性指标符合《建筑材料放射卫生防护标准》要求,砖体主要指标达到普通烧结砖的国家标准,具有高抗压强度、节省能耗10%和重量比同体积普通砖轻等… 相似文献
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由于各种原因的影响,斜风道、环风道部位耐火砖在生产5~6年后,斜风道就产生断裂,过顶砖出现剥落;环风道部位耐火砖产生断裂、垮塌,无法进行正常生产。针对斜风道、环风道部部位耐火材料破损情况,通过在预存室和环形气道中采用托砖板把干熄炉炉衬耐火材料分隔开,提出对斜风道、环风道部位耐火材料进行拆除和重新砌筑的方法。一方面能节省耐火材料采购费和施工费;另一方面能节省干熄炉检修时间,使之提前重新投入生产。 相似文献
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本文从当今可持续性的观念出发,讨论与砖这种历史悠久的材料及工艺相关的4个问题:1)砖的生产是采用本地化模式还是全球化模式;2)砖的原料是来自于自然粘土还是其他替代物;3)砖是用于围护结构实体还是装饰面层;4)在建造中是使用新砖、旧砖,还是新旧混用。 相似文献
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Different methods have been investigated for achieving heat insulation in the buildings. Manufacturing of high heat conductivity resistant construction materials is an important part of these research efforts. Perlite is an extremely useful material for heat insulation and 70% of the world reserves are located in Turkey. Nearly 65% of the perlite produced today is consumed by the construction industry. Its thermal, lightness, and acoustic insulation properties make perlite an excellent material to be used as lightweight aggregate in brick manufacturing. High heat resistant brick can be produced by adding perlite into the clay in conventional brick manufacturing. In this investigation perlite of Eski?ehir region and clay were collated and fired to form high heat conductivity resistant material. Binding materials such as cement, gypsum, lime, bitumen and clay were used for manufacturing perlite brick. Bricks in standard sizes manufactured at different perlite–clay ratios and unit weight, compressive strength, volume reduction and heat conductivity values were obtained. Then the mixture with the best combination of the properties was determined and cost optimization was described. Results were examined according to combination properties, and specialties of perlite bricks were determined at various weights. As a result, the best mixture was determined as the one containing 30% perlite. 相似文献
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在制砖用黏土中按所定范围内的粒径和用量掺入废耐火砖粒料来制砖,砖不仅可获得不同等级的抗压强度,特别是高抗压强度,而且达到所需的吸水率. 相似文献
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废砖制备新型轻质墙体材料的试验研究 总被引:1,自引:0,他引:1
废砖新型轻质墙体材料是以废砖粉为主要原材料,普通硅酸盐水泥为胶凝材料,配以废泡沫塑料以及各种外加剂,经发泡剂发泡,在常温、常压条件下养护而成。介绍了原材料、生产工艺并对影响因素及材料强度形成机理进行了研究和探讨。 相似文献
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Yaqian Zhao Baiming Ren Andrew O’Brien Simon O’Toole 《The International journal of environmental studies》2016,73(5):719-730
Throughout the world, alum sludge is dewatered and the resultant cakes are discarded in landfill. This paper reports a study to investigate the possible incorporation of alum sludge as a partial replacement for clay in clay brick manufacturing. It is the first study of this problem in Ireland. Alum sludge cakes and clay were separately dried, ground and sieved in preparation for making test specimens. Cylindrical clay bricks were made at different temperatures (800, 1000, 1100, 1200 °C), incorporating different percentages (0, 5, 10, 15, 20, 30, 40% by dry weight) of alum sludge. The bricks were then subjected to compressive strength test and submersion. Loss on ignition, water absorption and weight reduction were calculated. It was found that bricks containing up to 20% sludge, fired at 1200 °C, or containing 5% sludge and fired at 1100 °C have met the European and Irish Standards as set out by Eurocode 6 – ‘Design of Masonry Structures’. The firing temperature and the increase in sludge content affected the final clay-sludge brick colour. By increasing the proportion of alum sludge, compressive strength decreased and the final weight of the brick was reduced. Firing temperatures that are too high may result in damage to the bricks during firing. This study has demonstrated the promising potential and prospects for Irish dewatered alum sludge cakes in clay-sludge brick making. 相似文献