共查询到19条相似文献,搜索用时 125 毫秒
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本文主要探讨利用抛光废渣工业化生产轻质砖时,产品容易产生鼓泡缺陷的问题。讨论了鼓泡产生的原因,并通过试验确定了影响鼓泡的主要因素。结果表明:水分含量、砖坯厚度、细粉含量是影响轻质砖鼓泡的主要因素。 相似文献
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目前陶瓷废料堆积量较大,难以全部回收利用.采用抛光渣、压榨泥、废砖屑三种陶瓷废料为原料制备轻质保温泡沫陶瓷,研究三种陶瓷废料配比、发泡剂含量、烧成温度和保温时间对泡沫陶瓷试样性能的影响.最终采用60wt%的抛光渣、30wt%废砖屑和10wt%压榨泥为原料,添加0.6wt%的SiC作为发泡剂,在1160℃保温时间30 min的条件下制得体积密度0.41 g/cm3、抗压强度3.5 MPa、导热系数0.14 W/(m·K)的泡沫陶瓷材料.研究采用100wt%陶瓷废料烧制泡沫陶瓷,为陶瓷废料综合利用提供了一条可行的途径. 相似文献
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废日用陶瓷等固体废物制备高强轻质陶粒的研究 总被引:3,自引:0,他引:3
探讨并分析了利用废日用陶瓷、珍珠岩尾矿和赤泥等工业废渣为主要原材料以及煤粉和磁铁矿粉作造孔剂研制高强轻质骨料.研究表明,所研制的陶粒具有高强、轻质、低吸水率的特点,比筒压强度可达8.05×10*-3MPa·m3/kg,吸水率仅为6.3%,大大低于国家标准15%的要求,为废日用陶瓷等工业废渣综合利用提供了一条新的途径. 相似文献
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Yiran Dong Congcong Jiang Lina Zhang Dan Wang Shifeng Huang Xin Cheng 《International Journal of Applied Ceramic Technology》2022,19(5):2686-2700
Using granite scrap and red mud as raw materials, SiC as foaming agent, powder sintering method was used to prepare closed-pore foamed ceramic. The effects of the ratio of red mud and granite scrap, foaming agent content, sintering temperature and holding time on the crystalline phase, pore structure, and performance of foamed ceramic were systematically studied. The results showed that, when the content of red mud was 10 wt%, together with 1.0 wt% SiC addition, the heating rate was 5°C/min, the foamed ceramic sintered at 1130°C for 30 min exhibited optimal properties, including bulk density of 483.11 kg/m3, porosity of 77.27%, compressive strength of 1.62 MPa and water absorption of .49%. Based on these properties, it possessed broad potential application prospects in the fields of sound and thermal insulation, lightweight construction materials. In this study, the utilization ratio of industrial solid waste was 100%, realized the comprehensive utilization of granite scrap and red mud, and provided a new idea to realize their low-cost utilization by preparing foamed ceramic with associated economic and environmental benefits. 相似文献
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Huizhi Yang Changping Chen Lijun Pan Hongxia Lu Hongwei Sun Xing Hu 《Journal of the European Ceramic Society》2009,29(10):1887-1894
Double-layer glass-ceramic/ceramic tiles made from bauxite tailings and red mud were prepared using a single firing powder processing route. The influence of the preparation method used for the green bodies on the microstructure and mechanical properties of the final products was investigated. The macroscopic appearance, microstructure, and mechanical properties indicated that the production of double-layer glass-ceramic/ceramic tiles may be an attractive method for recycling industrial waste into building materials. 相似文献
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M.F. Gazulla E. Sánchez J.M. González M.C. Portillo M. Orduña 《Journal of the European Ceramic Society》2011,31(15):2753-2761
This paper examines the relationship of certain red ceramic roofing tile properties to roofing tile biodeterioration. The following properties were studied: apparent porosity, roughness, and the presence or absence of two types of coatings.The effect of apparent porosity was studied by varying the peak firing temperature of a standard industrial red ceramic roofing tile composition and by preparing several clay mixtures, of different chemical and mineralogical composition, that were fired at various peak temperatures. The effect of roofing tile roughness was determined by either polishing or sanding fired standard red roofing tiles. A waterproof ceramic glaze coating and a photocatalytic coating were formulated to analyse the effect of the presence of different types of coatings. Roofing tile bioreceptivity was evaluated with a method developed in a previous study using the cyanobacteria Oscillatoria sp, which enabled roofing tile resistance to microbial colonization to be determined.As expected, bioreceptivity rose as apparent porosity (measured as water absorption) increased, enabling possible water retention, which favours biological growth. Similarly, greater roughness encouraged micro-organism adhesion and raised bioreceptivity. It was found that, after prolonged exposure periods (several months) under very favourable conditions for biological colonization, roofing tiles coated with the waterproof ceramic glaze were colonized. However, glazed standard red roofing tiles covered with a TiO2 photocatalytic coating exhibited practically no biological growth under the test conditions used, even after long exposure times, owing to the chemical-physical effect of the TiO2-based coating. 相似文献
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综述了近年赤泥在有价组分回收、污水处理、气体净化、催化材料、建筑材料及土壤改良等方面的机理研究和应用进展,通过赤泥理化特征分析阐述其各个应用方向的优势及前景。指出造成目前赤泥综合利用率低的最大因素是赤泥中含有大量碱性物质和重金属等,由此突出介绍了赤泥脱碱技术及赤泥毒性浸出研究。总结了国内外赤泥资源化途径较为分散、对赤泥利用的系统研究不足、未真正实现赤泥最大程度资源化也未解决当前赤泥造成的现实及潜在环境安全等问题。立足赤泥处置的"减量化、无害化和资源化"原则,并基于我国国情提出了"气体净化-资源回收-制备建筑材料"赤泥综合治理利用技术路线,为大规模工业固废-赤泥的资源化利用提供了新的研究和工业化思路。 相似文献
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赤泥是氧化铝生产过程中产生的强碱性废弃物,其强碱性是制约自身大规模综合利用的重要因素。因此十分有必要对赤泥进行脱碱,以期实现赤泥的综合利用,保障铝工业可持续发展。论文综述了国内外赤泥脱碱方法,如水洗法、酸浸法、石灰法、盐类浸出法、CO2法、生物法等;同时从自由碱和化学结合碱的角度分析了各种脱碱方法的特点及主要脱碱机理,总结出赤泥脱碱的原理主要是中和反应、沉淀反应及钠置换反应。最后剖析了各种脱碱方法存在的问题,并对赤泥脱碱的研究提出了建议,这将为赤泥脱碱技术的进步以及赤泥的综合利用提供参考。 相似文献