废玻璃的回收与利用（二）

2 我国废玻璃回收应用概况 2．1 我国废玻璃的回收 我国在废玻璃回收利用方面起步较晚，主要是由玻璃工厂自行回收边角废料，酒厂回收酒瓶，上世纪80年代末至90年代，国内出现了以废玻璃为原料生产再生平板玻璃的小平拉厂，当时用废玻璃生产再生玻璃是我国废玻璃利用的主要途径。各大、中、小城镇废品收购站回收的废玻璃其数量较小。     

废玻璃的回收与利用（一）

本文简要地介绍了当今国内外废玻璃的回收概况及值得人们关注的经济地利用废玻璃应用领域，并简要地介绍了欧、美、日本和中国各自研制废玻璃的回收与应用和利用废玻璃生产的玻璃制品。文中介绍的欧美等国家有关废玻璃的回收状况和研制利用废玻璃生产的玻璃制品，对我国今后废玻璃的回收应用和研制利用具有其一定参考价值。     

废玻璃的回收与利用

概括了国内外废玻璃的回收状况及应用领域,对欧、美、日等国各自研制的废玻璃回收装置和利用废玻璃生产的各种玻璃制品及废玻璃在其它领域的应用作了较详细的介绍。对我国今后废玻璃回收利用,提高其附加值,减少环境污染具有一定参考价值。     

废玻璃在陶瓷行业的应用

介绍了废弃玻璃在陶瓷行业目前的主要应用技术和途径。对我国今后废玻璃回收利用．陶瓷行业的发展．减少环境污染具有一定参考价值。     

废玻璃的回收处理和利用

由于环境保护,节约原料和节能考虑,西欧各国都建立了“废玻璃银行”,回收废玻璃经过处理,经济而有效地供应玻璃厂再生产用。西德废玻璃利用每年递增20%;1980年达74.5万吨,约占当年总熔化量260万吨的28%,相当于节省燃油18万吨。西德惹普废玻璃处理厂得到政府财政补助,从1977年开始建起了从回收、破碎、筛分、清冼、运输,到有效供应的一整套处理体系。回收来的各种废玻璃到厂后,用人工或机械送进料仓,经振动给料机送到向上的     

废玻璃的回收处理与利用

简述了废玻璃回收的作用,介绍了废玻璃的处理工艺并提出了碎玻璃质量和粒度标准的草案,详细讨论了利用碎玻璃存在的问题以及如何调整工艺参数。     

新型环保材料玻璃轻石的生产、应用现状和发展建议

废玻璃的回收利用是急需解决的环保难题,玻璃轻石是一种无机多孔新型环保材料,应用领域广泛,主要以废玻璃为原料,可消纳大量的废玻璃,为废玻璃的再利用提供一条有效途径。本文结合国内外玻璃轻石的研究现状,重点分析我国玻璃轻石的生产现状、发展过程中存在的问题和建议。     

稀土金属浸出回收技术研究进展

稀土金属在军事、冶金、石油化工、玻璃陶瓷、医药等众多领域均有应用，是现代工业发展以及设计和开发高科技产品的必要原料。随着稀土金属需求量的迅速增长和稀土资源开发力度的加大，稀土自然资源储量不断减少、品位持续降低，因而从稀土原矿和二次资源中提取和回收稀土金属的新技术研究备受关注。独居石、氟碳铈矿和离子型稀土矿是稀土金属的主要来源，废镍氢电池、废荧光材料和废钕铁硼磁体是回收稀土金属的二次资源。综述了稀土原矿和稀土二次资源的浸出和回收技术进展，以期为开发各种条件下稀土金属的有效浸出回收途径提供参考。     

重视废玻璃的回收利用

作者指出了回收利用废玻璃不仅有经济效益,也有社会效益,国外相当重视.他们组织回收渠道,建设专门的处理工厂,开发这部分资源进行综合利用,还提出了加工外购废玻璃的加工质量标准.     

废弃玻璃在再生混凝土中的应用研究

废玻璃和废混凝土是广泛存在的两种固体废弃物,如何对它们进行有效地回收利用越来越受关注.国内外学者对再生混凝土基本性能以及结构性能等方面进行了比较系统的研究,取得了很多可以用于实践的成果;在废弃玻璃应用于混凝土方面,研究了废弃玻璃作为混凝土骨料的基本性能,近年来进行了将废弃玻璃粉作为辅助胶凝材料替代部分水泥的研究.本文通过对比分析废弃混凝土应用于混凝土中和废弃玻璃应用于混凝土中的研究成果,表明废玻璃和废混凝土两种固体废弃物进行综合利用生产再生混凝土具有一定的可行性.     

Studies on expansion properties in mortar containing waste glass and fibers

The utilization of waste glass in concrete can cause cracking and weakening due to expansion by alkali-silica reaction (ASR). In this study, ASR expansion and properties of strength were analyzed in terms of waste glass content, glass color (brown, green), fibers (steel fiber, polypropylene fiber) and fiber content, in anticipation of reducing ASR expansion.Results showed that green waste glass was more usable than brown because its expansion was less than that of brown glass. Using the accelerated ASTM C 1260 test of waste glass, no pessimum content was found. Furthermore, when fibers and waste glass were combined, there was an effect on the reduction of expansion and strength loss due to ASR between the alkali in the cement paste and the silica in the waste glass. In particular, adding 1.5 vol.% of steel fiber to concrete containing 20% waste glass reduced the expansion ratio by 40% and increased flexural strength by up to 110%, a vast improvement when compared with using only waste glass (80 °C H₂O curing) by itself.     

Bone china formulated with waste glass

Abstract

Abstract

Bone china is known for its technical and aesthetical quality with distinguishable whiteness, brightness and high mechanical strength. In this work, the use of waste glass was investigated in a bone china composition. This makes the production of this porcelain even more interesting from the environmental point of view, since most of its raw materials are from recyclable sources. Potash feldspar was partially replaced by waste glass, and the technical and slip rheological properties, phase development and microstructure after firing of the ceramic bodies were evaluated. The results revealed that waste glass provides a reduction in firing temperature and large plateau for firing while maintaining the quality of the final porcelain, including thermal expansion and mechanical strength.     

模拟高放废液玻璃固化体析晶性能研究

以焦耳炉生产的含16%(质量分数)模拟高放废液(HLW)的硼硅酸盐玻璃固化体作为实验材料,研究了玻璃固化体在不同热处理温度下的析晶行为和热稳定性。结果表明:部分固化体在实际生产和储存过程中内部已经出现辉石晶相,已析晶玻璃的活化能较未析晶玻璃低40~60 kJ/mol;热处理试验证实辉石相在700~900 ℃内析出,同时随结晶度的增加玻璃固化体的表观颜色也发生变化。研究析晶与热历史之间的相关性有助于预测高放废物玻璃中结晶相的产生,研究结果可为焦耳炉固化工艺的进一步控制提供理论依据。     

Leaching behavior of fly ash-waste glass and fly ash-slag-waste glass-based geopolymers

The leaching behavior of contaminants in the fly ash/waste glass or fly ash/blast furnace slag/waste glass-based geopolymers was investigated through surface area analysis and leaching tests. Spent fluorescent lamps classified as hazardous waste due to their specific contaminant contents were used as a source of waste glass. The results from semi-dynamic leaching tests showed that the mobility of contaminants increases as the amount of waste glass added to the synthesis mixture increases. These results are consistent with those obtained from the surface area analysis. However, the comparative analysis of mobility of contaminants between types of activated mixtures highlighted a different trend of mobility of contaminants to that of pore size distributions. Therefore, the leaching behavior of contaminants suggests that their immobilization in the activated mixtures might occur by both physical and chemical mechanisms. Also, it was emphasized that waste glass is not compliant with respect to its leachable Hg content, and that Hg and Pb exhibit high mobility in the geopolymers with high amount of waste glass added to the synthesis mixtures.     

利用工业固体废弃物制备微晶泡沫玻璃的研究现状及展望

工业固体废弃物在一定程度上属于可以重新利用的资源,其综合利用问题一直备受国内外学者关注.分析了利用工业固体废弃物制备微晶泡沫玻璃的可行性.综述了以粉煤灰、煤矸石、废玻璃、高炉渣、尾矿和油页岩渣等工业固体废弃物为原料制备微晶泡沫玻璃的国内外研究进展,以期为相关科学研究工作和工业化生产提供参考和借鉴.总结了目前利用工业固体废弃物制备微晶泡沫玻璃亟待解决的问题.     

Crystalline-Phase Formation in Hot Isostatic Pressing of Nuclear Waste Ceramics with High Zirconia Content

Ceramic forms with a significant glass phase have been prepared from Zr-rich simulated Idaho Chemical Processing Plant high-level nuclear waste by hot isostatic pressing of redox-controlled waste and chemical additive calcines. Crystalline-phase formation in the ceramics is a function of the waste loading, additives, and consolidation temperature. Actinide host phases are controlled by silica-zirconia crystal chemistry; the composition of the amorphous phase dominates the leaching behavior. Two phase assemblages—one consisting of CaF₂, ZrO₂, ZrSiO₄, and glass, the second of CaF₂, ZrO₂, YNaSiO₄, ZrSiO₄, and glass—showed leach resistance superior to melter-processed borosilicate glass forms for uranium and, at waste loadings >80 wt%, offer a factor of up to 3.2 times greater volume reduction. The presence of the designed glass phase in the waste forms makes them more flexible to variations in waste composition and lowers the required hot isostatic pressing temperature for consolidation as compared with polycrystalline waste ceramics, while maintaining the actinide leach resistance of the crystalline phases.     

Waste glass in civil engineering applications—A review

Each year, hundreds of thousands of tons of industrial wastes are being stockpiled, landfilled, and disposed of in storages occupying large areas of land that would otherwise be available for productive use. Recycling of such wastes is now becoming of urgent global interest due to an increasing population, the rise in anthropogenic activities, and the need for more efficient resource and waste management systems. Among many wastes, the generation of glass is dramatically increasing, particularly in the municipal, industrial, and construction sectors. In civil engineering, in general, crushed waste glass has been mainly investigated as a substitute for sand and fine-grained aggregate in concrete production. In geotechnical engineering, in particular, the application of glass wastes is mainly limited to road pavements or as an additive to different soils for subgrade improvement. While glass wastes are relatively inert and potentially offer several opportunities for recycling as a substitute for diminishing and increasingly expensive sand supplies, their potential use yet remains relatively under-researched. This paper systematically reviews the current status of knowledge on the use of glass wastes in various civil engineering applications and discusses the suitability assessment of waste glass for use as a sustainable alternative to traditional civil engineering materials.     

玻璃纤维废丝回收使用技术探讨

结合国内外玻璃纤维废丝回收使用技术的发展以及实际工作中玻璃纤维废丝回收使用的经验,从加工工艺、原料工艺、池窑工艺三方面系统探讨了玻璃纤维废丝回收使用技术。试验对比分析了不同工艺的作业情况和作业指标,结果显示,当把废丝作为一种新的原料来使用,采取适合其生产特点的技术非常重要。     

Mechanical and leaching properties of neodymium-contaminated soil glass-ceramics

The safe treatment of radioactive-contaminated soil is of great significance. In this work, neodymium-contaminated soil was successfully immobilized using microwave sintering to form glass-ceramics. The microstructure, morphology, elemental distribution, Vickers hardness, and chemical durability of the sintered samples were analyzed. The results showed that the glass-ceramic is more suitable to immobilize the waste compared with the glass matrix. XRD and SEM-EDS results proved that the waste form has been totally immobilized in the sintered matrix whether in glass-ceramics and glass. However, the leaching rate of element Nd in glass-ceramic was lower than the glass matrix at 28 d. Moreover, the Vickers hardness results of glass-ceramic were higher than that of glass. Thus, glass-ceramics can not only reduce sintering temperature and save energy but also achieve a better immobilizing effect. Our investigation reflects that glass-ceramics are more suitable for neodymium-contaminated soil immobilization using the microwave sintering method.     

玻璃纤维废丝的处理和利用

介绍了我国玻璃纤维工业发展带来的废丝问题,废丝处理的工艺流程,对生产中容易出现的问题进行分析;并对废丝在连续玻璃纤维生产、玻璃棉生产、玻璃马赛克生产、陶瓷釉料上的应用进行可行性分析,结论为根据废丝成分等特征,以上应用可行。