陶瓷抛光废渣在多孔陶瓷中的应用研究

以陶瓷抛光废渣为主要原料制备多孔陶瓷,研究了抛光废渣在多孔陶瓷中的影响因素,探讨了多孔陶瓷孔隙率、容重、断裂模数之间的关系。     

电石渣对陶瓷抛光废渣基多孔材料的改性作用

本文将以陶瓷抛光废渣为主要原理,以电石渣为改性剂,在研究过程中采用水热蒸压法制备出多孔材料作为光催化剂载体,然后分析陶瓷抛光废渣基多孔材料的实际组成、结构以及物理性能的表征情况,进而确定电石渣对陶瓷抛光废渣基多孔材料的改性机理以及最佳添加量。     

陶瓷抛光废料对多孔陶瓷轻质砖性能及结构影响的研究

以建筑陶瓷抛光废料为主要原料研制了以石英和莫来石为主晶相的多孔陶瓷轻质砖,并采用XBD、显微镜分析了建筑陶瓷抛光废料掺量对多孔陶瓷轻质砖的晶相、气孔结构和断裂模数的影响。研究结果表明：增加建筑陶瓷抛光废料掺量可提高多孔陶瓷轻质砖的气孔率,但会降低其断裂模数;而加入锻烧Al2O3、不仅可提高建筑陶瓷抛光废料的掺量,而且可促进多孔陶瓷轻质砖中堇青石和刚玉的形成,从而改善其断裂模数等力学性能。     

回收抛光废渣制备陶瓷砖的研究发展现状

随着陶瓷行业的快速发展,抛光废渣的循环利用已经成为国内外学者研究的热点。本文从抛光废渣制备陶瓷砖的角度,分析国内企业和科研院所对抛光废渣制备陶砖的研究与应用现状。重点总结了抛光废料在制备墙内釉面砖、多孔陶瓷砖、陶瓷仿古砖、免烧透水砖以及超薄抛光砖方面的研究和应用情况,以期帮助企业节约陶瓷生产升本和固体废料的污染问题。     

大规格轻质陶瓷板的研制

本文以陶瓷抛光废渣为主要原料,通过配方优化、烧成制度的设计及装备设计,研制了大规格轻质陶瓷板,其规格达1000mm×2000mm以上.既为市场提供了一种新的建筑装饰材料,也为解决陶瓷抛光废渣的出路提出了新的方向.     

粉煤灰基轻质多孔陶瓷的制备及性能研究

采用XRF、XRD、SEM等测试手段,研究了山西朔州粉煤灰的物理性能、化学成份、显微结构与组成.以粉煤灰为原料,采用正交实验,研究了粉煤灰、陶瓷抛光废渣、废熔块、烧滑石等含量对轻质多孔陶瓷性能的影响.研究表明:SiC含量对粉煤灰基轻质多孔陶瓷性能影响最大,熔剂废熔块含量次之.确定了最优配方,制得密度0.51 g/cm3,导热系数0.082 W/(m·K)的轻质发泡陶瓷.     

工业废渣制备多孔陶瓷的研究进展

总结了利用工业废渣(粉煤灰、赤泥、冶金炉渣、尾矿等)制备多孔陶瓷的发展现状,指出了以工业废渣制备多孔陶瓷可以带来长期的经济和社会效益,并展望了工业废渣二次利用的发展方向。     

陶瓷抛光废渣循环利用新技术

本文主要论述了陶瓷抛光废渣循环利用的新技术。将陶瓷抛光废渣作为高档釉面砖坯体的主要原料（加入量为16％～22％）,通过采用“特定阶段延长烧成时间、缩小素烧与釉烧温度差、调高底釉熔融温度、调高面釉高温粘度”的适应性工艺,从而达到较大量掺入抛光砖废渣生产釉面砖的目的。     

以陶瓷抛光渣为辅助骨料制备瓷砖粘结剂的研究

以陶瓷抛光废渣为辅助骨料制备瓷砖粘结剂,具有重要的经济意义和社会环保意义。本文通过实验研究了抛光废渣和胶粉添加量对水泥砂浆拉拔强度的影响。并研究了抛光废渣添加量对水添加量的影响。结果表明,抛光废渣对水泥砂浆拉拔强度有显著的影响。当胶粉添加量为2 wt%、抛光废渣的添加量为25 wt%时,样品的各项性能指标最优。     

陶瓷抛光废渣高温发泡机理分析

本文以陶瓷抛光废渣为研究对象,通过600～ 1200℃烧成温度处理废渣,分析试样体积、重量、晶相随温度的变化规律.研究结果表明,陶瓷抛光废渣在1000～1200℃时,物料相变成为热熔体,部分组分氧化分解,产生气体,气体加速热熔体相界面位移,形成多孔结构;气孔的生成阻碍晶体的生长,当热熔体冷却后,大量的晶体转化为非晶体.     

陶瓷抛光废料对多孔陶瓷砖气孔形成过程影响的研究

本文以陶瓷抛光废料为主要原料,研制了以石英和莫来石为主晶相的多孔陶瓷轻质砖,采用XRD、显微镜分析了陶瓷抛光砖废料对其气孔形成过程的影响,探讨了影响其气孔形成的主要因素。研究结果表明,陶瓷抛光砖废料由于含有机物和无机盐,可作为成孔剂,在400-700℃温度范围,有机物分解形成小气孔,随着温度的升高,以钙镁碳酸盐为主的无机盐在900℃左右分解,所形成的气孔由小变大;影响多孔陶瓷轻质砖气孔形成的主要因素是原料配方和烧成制度。     

利用破损陶瓷和陶瓷废料制造陶瓷透水砖

利用破损陶瓷和陶瓷废料为主要原料,低成本制造高附加值的透水砖。依此方案生产透水砖,陶瓷破损料和陶瓷废料的加入量最多可占到75%,在较大范围内调整破损洁具、抛光砖、瓷片和抛光砖磨屑间的加入比例也可以适应烧成工艺。     

Recycling of silicon kerf waste for preparation of porous SiCw/SiC membrane supports by in situ synthesis

Recycling has enormous economic benefits and practical significance under the context of gradually increasing solid wastes. In order to recycle and reuse the silicon kerf waste, in this work, porous SiC_w/SiC ceramics were successfully prepared by in situ synthesis from silicon kerf waste and fired at 1400-1500°C for 4 hours. The results showed that these porous ceramics, reinforced by the interlocking whisker, revealed high apparent porosity (48.02%-51.76%) and cold compressive strength (5.68-9.54 MPa). Furthermore, the practicable pore size (2.09-2.53 μm) and decent durability showed the potential of these porous ceramics as membrane supports. This work verified the possibility of the SiC-based ceramics prepared from the silicon kerf waste.     

多孔TiO2陶瓷光催化剂降解糠醛废水

以钛酸四丁酯等为原料，采用简单工艺制得多孔TiO2陶瓷光催化剂；并研究了利用多孔TiO2陶瓷光催化降解糠醛废水。结果表明，在紫外灯下照射60min，糖醛废水的COD去除率可达59．8％，而通入空气有利于污染物的去除。     

Opportunities of porous ceramics fabricated by gelcasting in mitigating environmental issues

Porous ceramics fabricated by gelcasting bring many unique capabilities in mitigating environmental issues, particularly waste recycling and neutralization of hazardous emissions. Potential opportunities for using gelcasting technique in setting mechanically foamed slurry can be described by adaptable designing and modification of the foamed slurry characteristics with a goal of preserving the environment. In this paper, we describe three directions of porous shaping routes through gelcasting in an attempt to mitigate environmental issues. Firstly, the fabrication of porous ceramics with inclusion of non-through holes and double-layered porous structure was described as an effective means of reducing pressure drop during filtration. Secondly, the non-toxic gel-former has been successfully applied to the gelling of waste loaded foamed slurry under ambient condition. The process has great benefit not only for the fabrication of lightweight ceramics with multifunction purposes, but also for the development of endless recycling system. Lastly, the pyrolysis of gelcast dried porous ceramics under oxygen-free atmosphere has provided a promising material as a filter having a heating function for oxidation of hazardous emissions.     

环氧树脂含量对激光选区烧结制备多孔煤系高岭土陶瓷性能的影响

目前,我国对煤系高岭土资源的整体深加工技术水平较低,导致了资源浪费和环境污染。本文分别以煅烧煤系高岭土和环氧树脂为原料和粘结剂,利用激光选区烧结工艺制备多孔煤系高岭土陶瓷,研究了环氧树脂含量对多孔煤系高岭土陶瓷性能的影响。研究表明,制备的多孔煤系高岭土陶瓷主要物相为莫来石和方石英,其孔隙分布均匀。随着环氧树脂质量分数从10%增大到25%,多孔煤系高岭土陶瓷素坯的抗弯强度由0.17 MPa增大到0.32 MPa,多孔煤系高岭土陶瓷的抗弯强度由2.81 MPa减小到0.82 MPa,其气孔率由50.37%增大到59.69%。以煤系高岭土为原料,采用激光选区烧结工艺制备多孔陶瓷对煤系高岭土资源的开发利用具有较为重要的意义。     

SiC-based porous ceramic carriers for heat-conductive phase change materials through carbothermal reduction method

Iron tailings remain the environment-damaging waste from the iron ore, and high porosity porous ceramics are an attractive material to “turn waste into treasure.” To improve the thermal conductivity, porous ceramics with high silicon carbide content have been prepared by carbothermal reduction sintering process using argillaceous fine-grained iron tailings with high silica content. The carbothermal reduction reaction mechanism and the components and properties of samples in sintering process are investigated. The results show that reaction components in the tailings are mainly SiO₂ and Fe₂O₃ and liquid phase is generated rapidly between 1200°C and 1300°C, producing foaming effect and significantly improving the porosity. Moreover carbothermal reduction of SiO₂ occurs above 1300°C. After sintering at 1600°C for 2 hours, the apparent porosity and thermal conductivity of porous iron tailing ceramics are 81.1% and 0.58 W/(m·K), respectively. Compared with the ordinary porous iron tailing ceramics with the same porosity, the thermal conductivity of those herein is increased by 6.6 times. This study is instructive for the development of low-cost preparation technology of phase change material carriers.     

造孔剂种类对粉煤灰多孔陶瓷性能的影响研究

以工业废弃物粉煤灰为主要原料,采用添加造孔剂法,分别以淀粉和煤粉为造孔剂,模压成型,在1000℃固相烧结制备粉煤灰多孔陶瓷,用SEM测试分析手段表征不同条件下粉煤灰多孔陶瓷的微观结构变化,研究了造孔剂种类及用量对显气孔率、抗弯强度、吸水率、体积密度、耐酸碱性能的影响.