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Characteristics of waste automotive glasses as silica resource in ferrosilicon synthesis

机译：汽车废玻璃作为硅铁合成中二氧化硅资源的特征

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摘要

This fundamental research on end-of-life automotive glasses, which are difficult to recycle, is aimed at understanding the chemical and physical characteristics of waste glasses as a resource of silica to produce ferrosilicon. Laboratory experiments at 1550℃ were carried out using different automotive glasses and the results compared with those obtained with pure silica. In situ images of slag-metal separation showed similar behaviour for waste glasses and silica-bearing pellets. Though X-ray diffraction (XRD) showed different slag compositions for glass and silica-bearing pellets, formation of ferrosilicon was confirmed. Synthesized ferrosilicon alloy from waste glasses and silica were compared by Raman, X-ray photoelectron spectroscopy and scanning electron microscopy (SEM) analysis. Silicon concentration in the synthesized alloys showed almost 92% silicon recovery from the silica-bearing pellet and 74-92% silicon recoveries from various waste glass pellets. The polyvinyl butyral (PVB) plastic layer in the windshield glass decomposed at low temperature and did not show any detrimental effect on ferrosilicon synthesis. This innovative approach of using waste automotive glasses as a silica source for ferrosilicon production has the potential to create sustainable pathways, which will reduce specialty glass waste in landfill.
机译：这项关于难以回收的汽车玻璃报废的基础研究旨在了解废玻璃的化学和物理特性，废玻璃是生产硅铁的二氧化硅资源。使用不同的汽车玻璃在1550℃进行了实验室实验，并将结果与​​纯二氧化硅进行了比较。矿渣-金属分离的原位图像显示出废玻璃和含二氧化硅颗粒的行为相似。尽管X射线衍射（XRD）显示了含玻璃和二氧化硅颗粒的矿渣成分不同，但已确认形成了硅铁。用拉曼光谱，X射线光电子能谱和扫描电子显微镜（SEM）对废玻璃和二氧化硅合成的硅铁合金进行了比较。合成合金中的硅浓度显示，从含二氧化硅的颗粒中回收的硅几乎达到92％，从各种废玻璃颗粒中回收的硅达到74-92％。挡风玻璃中的聚乙烯醇缩丁醛（PVB）塑料层在低温下分解，并且对硅铁的合成没有任何有害作用。使用汽车废玻璃作为硅铁生产二氧化硅原料的创新方法具有创造可持续发展途径的潜力，这将减少垃圾填埋场的特种玻璃浪费。

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  • 来源
    《Waste management & research》 |2016年第2期|113-121|共9页
  • 作者

    Rifat Farzana; Ravindra Rajarao; Veena Sahajwalla;

  • 作者单位

    Centre for Sustainable Materials Research and Technology (SMaRT@UNSW) School of Materials Science and Engineering, UNSW Australia, Sydney, NSW 2052, Australia;

    Centre for Sustainable Materials Research and Technology (SMaRT@UNSW) School of Materials Science and Engineering, UNSW Australia, Sydney, NSW 2052, Australia;

    Centre for Sustainable Materials Research and Technology (SMaRT@UNSW) School of Materials Science and Engineering, UNSW Australia, Sydney, NSW 2052, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Laminated glass; tempered glass; ferrosilicon alloy; silica; glass recycling;

    机译：夹层玻璃;钢化玻璃硅铁合金二氧化硅玻璃回收;

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