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。     

利用废玻璃研制瓷质砖及陶瓷透水砖

以陶瓷废料,废玻璃和粘土为主要原料研制瓷质砖及陶瓷透水砖,通过对该材料的吸水率、显气孔率、抗折强度、体积密度等性能的测试及SEM分析,结果表明:在合适的工艺参数条件下,可得透水系数为0.10cm/s,压缩强度为12.1Mpa透水瓷砖及瓷质砖。     

水煤浆渣用于烧制陶瓷的研究

建筑陶瓷业每年要产生大量的水煤浆渣,废料堆放成为重要难题。这里以建筑陶瓷水煤浆废料为主要原料研制了以石英和莫来石为主晶相的陶瓷抛光砖,并采用XRD、SEM分析了建筑陶瓷水煤浆渣掺量对陶瓷抛光砖的晶相、气孔结构与断裂模数的影响。研究结果表明:水煤浆渣掺量为5%的抛光砖具有很好的力学性能,满足瓷质砖标准。     

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。     

伟晶石高性能陶瓷透水砖的研制

陶瓷透水砖是一种经过特殊工艺制成的具有连续孔隙的生态型环保陶瓷砖。采用伟晶石为主要原料,先将伟晶石烧制成高强轻质的陶粒,然后将高强陶粒二次烧结成陶瓷透水砖,所制成的陶瓷透水砖的抗压强度和透水性远高于JC/T945-2005《透水砖》标准要求。     

陶瓷废料制备轻质保温泡沫陶瓷的研究

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.     

工艺条件对环保型透水砖基本性能的影响分析

分析了原料的颗粒大小、配方、成型压力和烧成制度等对以陶瓷废料为主要原料的多孔透水砖的力学性能、气孔率、平均孔径和透水系数等的影响，为陶瓷废料的利用开辟了一条新途径。     

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。     

粉煤灰在再生陶瓷墙地砖中的应用

主要研究了粉煤灰在陶瓷墙地砖生产中的应用。在引入粉煤灰的同时,通过加入不同掺量的陶瓷废砖粒和抛光砖粉,在用硼砂作为辅助熔剂的条件下,以正交试验进行设计与分析,得出一组最佳配比,在扩大废物利用率的同时有效提高制品强度。     

陶瓷废料的组成与火山灰活性研究

摘要：通过X射线衍射分析、玻璃相含量测定、28d抗压强度比及火山灰活性等试验,研究了陶瓷玻化砖废料、瓷质废料、炻质废料和陶质花盆四种类型陶瓷废料的组成与火山灰活性,为开拓陶瓷废料的应用提供依据。研究结果表明：陶瓷抛光砖粉与废陶瓷玻化砖尽管主要成分相近,但前者氯含量较高,用于水泥混合材受到限制;几种类型的陶瓷废料均具有火山灰活性,其水泥胶砂28d抗压强度比均高于62％,废陶瓷玻化砖为82．1％,瓷质废料为80．8％,炻质废料为78．3％,陶质废料为77．3％。陶瓷玻化砖废料的玻璃相含量较高,瓷质废料其次,炻质和陶质废料的玻璃相含量较低。玻璃相含量较高的陶瓷废料其水泥胶砂28d抗压强度比．较高。     

抛光废渣在陶瓷砖中的应用及现状

瓷质抛光砖生产所产生的废料日益增多,不仅对环境造成巨大的压力,还影响了陶瓷工业的可持续发展,因此抛光砖废渣的处理与利用显得非常的重要。抛光砖废渣是目前陶瓷行业最难利用,也是利用得最少的废料;对抛光砖废渣进行再利用将有着广阔的前景。本文主要对抛光废渣的组成及烧结特性进行了分析,并对抛光砖废渣在陶瓷砖中的应用研究进行了综述,重点阐述了抛光砖废渣在陶瓷砖中的发泡机理。     

Foaming mechanism of polishing porcelain stoneware tile residues via adding C,Al and Si powder

Polishing porcelain stoneware tile residues (PPR) is used to prepare foamed ceramic to solve the problem of solid waste discharge in ceramic industry. In this study, C, Al and Si powder were added to the simulated PPR to control foaming, and the mechanism of silicon carbide foaming in the PPR was discussed in detail. After these powders were introduced into the simulated PPR, the phenomenon of alumina crystallization on the pore wall of the foamed ceramic and the diffusion of gas in the foamed ceramic were discovered to be exciting. The foaming mechanism of PPR is detailed as follows: the diffusion rate of oxygen in silicate liquid is faster than that of CO during sintering, so the CO generated by incomplete oxidation of silicon carbide in PPR accumulates in the liquid, which makes the volume of ceramics expand and causes foaming.     

Utilization of muscovite granite waste in the manufacture of ceramic tiles

Granite waste is by-product from a decorative rock industry. The present study aims to investigate the effect of muscovite granite waste on the physico-mechanical properties of ceramic tiles to demonstrate its suitability for industrial production. A series of flooring- and facing ceramic tiles were prepared by adding 20, 25, and 30 wt% muscovite granite waste into the batch compositions. The sintering behavior and degrees of densification of two kinds of ceramic tiles were evaluated by determining their physico-mechanical properties and characterizing them by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. As expected, the facing ceramic tile (FacCT1) sample, containing wollastonite, hematite, anorthite, quartz, and cristobalite, with 20 wt% muscovite granite waste showed lower physico-mechanical properties than those of the flooring ceramic tile (FloCT3) sample, containing mullite, calcium aluminosilicate, quartz, and cristobalite, with 30 wt% muscovite granite waste. The reason is that lower firing temperatures cannot accelerate a complete fusion of the granite waste which behaves like an inert non-plastic material similar to quartz. These results illustrate the prospects of utilizing muscovite granite waste in ceramic tile production.     

The effects of fine fire clay sanitaryware wastes on ceramic wall tiles

In the last decade, environmental preservation has become an important issue. Specifically, recycling of sanitaryware fine fire clay (FFC) waste is important for reducing costs. In this study, the use of FFC waste as an alternative raw material in the production of ceramic wall tiles was investigated. Five ceramic wall tile bodies were prepared by substituting kaolin (max. 15 wt%) with FFC wastes. All formulations were mixed, pressed into pellets and sintered at 1145 °C. The sintering behaviour was evaluated using an optical dilatometer. Water absorption, linear shrinkage and bending strength were also measured. This study revealed that FFC wastes are good alternative raw materials, and the corresponding formulations were shown to be viable in the manufacturing of ceramic tiles. The most remarkable conclusion from this study was that the addition of FFC waste decreased moisture expansion.     

Synthesis of a foam ceramic based on ceramic tile polishing waste using SiC as foaming agent

Due to the large amount of ceramic tile polishing waste generated in China, the recycling of this waste residue becomes important. Herein a foam ceramic was successfully produced by using ceramic tile polishing waste as main raw material. In this research, SiC was added as the foam agent, and the foaming mechanism was also investigated. The results showed that the best dosage of SiC was 1%. Furthermore, in order to obtain a foam ceramic with better structure, the sodium phosphate was added in raw materials as foam stabilizer. The influence of this addition on the microstructure and properties of foam ceramic was investigated. It was found that the optimum additive amount of sodium phosphate is 2–3%.     

Sintering mechanism of high-intensity and low-density ceramic proppants prepared by recycling of waste ceramic sands

Waste ceramic sands were effectively used to prepare the high-intensity and low-density ceramic proppants, realising the recycling of the waste ceramic sands. The technology involved the pelletising in an intensive mixer, in which the waste ceramic sands and other starting materials were added, and followed by heat-treatment under different sintering conditions. The sintering temperature, holding time and heating rate were optimised by investigating the crystalline phase, microstructure, density and breakage ratio of the obtained proppants. The results showed that the proppants sintered at 1260°C for 2?h with a heating rate of 5°C?min^–1 under air atmosphere exhibited high crush resistance and low density, with the breakage ratio of 8.5% under 52?MPa closure pressure and bulk density of 1.65?g?cm^–3. The proppants prepared by bauxite, waste ceramic sands and sintering aids are promising candidates as high-intensity and low-density fracturing proppants in future applications.     

Use of Waste Materials from the Production of Synthetic Rubber for Preparing Aluminosilicate Ceramics

An aluminum-silicon-chromium powder (ASC) extracted from waste gases in synthetic rubber production is used as an addition to kaolin-based ceramics, and its effect on the kinetics of sintering, compressive strength, and phase composition of mullite-corundum and corundum ceramic materials is studied. The strength of ceramic materials is mainly determined by the amount and composition of the mullite component. The effect of mechanochemical activation in an aqueous medium on the physicochemical properties of the mullite-corundum materials is studied.     

利用赤泥制备轻质高强保温装饰一体化建筑材料

利用赤泥为主要原料,添加建筑垃圾、抛光砖废料和粘土制备轻质高强保温装饰一体化建筑材料.通过改变赤泥用量、烧结温度、发泡剂添加量等条件,对样品体积密度、孔隙率、抗压强度进行了研究.利用X射线衍射仪(XRD)、扫描电镜(SEM)对样品物相组成和形貌进行表征.研究结果表明:赤泥用量为35%,发泡剂添加量为5%,烧结温度为1100℃时,制备样品的气孔分布均匀,孔径大小较一致,体积密度为0.26 g/cm3,孔隙率为73.28%,闭气孔率达到90.52%,抗压强度为7.83 MPa.     

Oxidation protection of SiC in porcelain tile ceramics by adding Si powder

Polishing porcelain tile residues (PPR) have accumulated to millions of tons and increases every year. It has become important to recycle the PPR due to the economic gains and environmental sustainability of doing so. However, its direct recycling in the production of porcelain tile has been limited by the fact that SiC particles oxidise during sintering which prevents the processing of dense ceramics. In this study, Si powder was introduced into the porcelain ceramics matrix containing SiC. The effect of Si powder additive on inhibiting the oxidation of SiC was evaluated using the relative density and the microstructure of the sintered samples. Results showed that the porcelain body containing SiC could be fully densitified when the suitable content of Si powder addition is introduced. These results indicate that it is a promising method to effectively protect the oxidation of SiC particles in the porcelain ceramics matrix during sintering.