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首页> 外文期刊>Journal of Hazardous Materials >Innovative methodology for comprehensive utilization of iron ore tailings Part 2: The residues after iron recovery from iron ore tailings to prepare cementitious material
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Innovative methodology for comprehensive utilization of iron ore tailings Part 2: The residues after iron recovery from iron ore tailings to prepare cementitious material

机译：铁矿石尾矿综合利用的创新方法论第2部分：从铁矿石尾矿中回收铁以制备水泥质材料后的残留物

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摘要

In order to comprehensive utilization of iron ore tailings, this experimental research was to investigate the possibility of using the residues after iron recovery from iron ore tailings as raw materials for the preparation of cementitious material, abbreviated as TSC, including analyses of its mechanical properties, physical properties and hydration products. The TSC1 was prepared by blending 30% the residues, 34% blast-furnace slag, 30% clinker and 6% gypsum. Meanwhile, the raw iron ore tailings (before iron recovery) with the same proportion of TSC1 were selected to compare the cementitious activity of raw tailings and the residues after magnetizing roasting, denoted by TSC0. The hydration products of them were mostly ettringite, calcium hydroxide and C-S-H gel, characterized by XRD, IRand SEM. It was found that ettringite and C-S-H gel were principally responsible for the strength development of TSC mortars with curing time. The results showed that the kaolinite of the tailings was decomposed completely after magnetizing roasting, which promoted the cementitious property of TSC1. Moreover, the mechanical properties ofTSCl are well comparable with those of 42.5 ordinary Portland cement according to Chinese GB175-2007 standard.
机译：为了全面利用铁矿石尾矿，这项实验研究旨在研究使用从铁矿石尾矿中回收铁后的残渣作为制备水泥质材料（简称TSC）的原料的可能性，包括对其力学性能的分析，物理性质和水合产物。通过混合30％的残渣，34％的高炉矿渣，30％的熟料和6％的石膏来制备TSC1。同时，选择了具有相同TSC1比例的生铁尾矿（铁回收前），以比较生铁尾矿和磁化焙烧后的残留物的胶凝活性，用TSC0表示。它们的水合产物主要是钙矾石，氢氧化钙和C-S-H凝胶，通过XRD，IR和SEM表征。发现钙矾石和C-S-H凝胶主要是随着时间的推移，TSC砂浆的强度发展。结果表明，磁化焙烧后尾矿中的高岭石完全分解，从而促进了TSC1的胶凝性能。此外，根据中国GB175-2007标准，TSCl的力学性能与42.5普通硅酸盐水泥的力学性能相当。

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  • 来源
    《Journal of Hazardous Materials》 |2010年第3期|78-83|共6页
  • 作者

    Chao Li; Henghu Sun; Zhonglai Yi; Longtu Li;

  • 作者单位

    State Key Lab of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China Room 2507, YIFU Science & Technology Building, Tsinghua University, Beijing 100084, China;

    State Key Lab of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China School of Engineering and Computer Science, University of the Pacific, Stockton, CA 95211, USA;

    Railway Engineering Research Institute, China Academy of Railway Science, Beijing 100081, China;

    State Key Lab of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    residues; iron ore tailings; cementitious material; hydration products;

    机译：残留物;铁矿石尾矿;胶结材料;水合产品;

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