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首页> 外文期刊>Journal of Hazardous Materials >Preparation and mechanism of the sintered bricks produced from Yellow River silt and red mud
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Preparation and mechanism of the sintered bricks produced from Yellow River silt and red mud

机译：黄河淤泥赤泥烧结砖的制备及其机理。

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摘要

The preparation, characteristics and mechanisms of sintered bricks manufactured by Yellow River silt and red mud were studied. The sintering shrinkage, weight loss on ignition, water absorption and com-pressive strength were tested to determine the optimum preparation condition. Sintering mechanisms were discussed through linear regression analysis. Crystalline components of raw materials and bricks were analyzed by X-ray diffraction. Leaching toxicity of raw materials and bricks were measured according to sulphuric acid and nitric acid method. Radiation safety of the sintered bricks was characterized by calculating internal exposure index and external exposure index. The results showed that at the chosen best parameters (red mud content of 40%, sintering temperature of 1050 C and sintering time of 2 h), the best characteristics of sintered bricks could be obtained. The weight loss on ignition of sintered bricks was principally caused by the removal of absorbed water and crystal water. The sintering shrinkage of sintered bricks mainly depended on sodium compounds and iron compounds of red mud. The sintering process made some components of raw materials transform into other crystals having better thermostability. Besides, the leaching toxicity and radioactivity index of sintered bricks produced under the optimum condition were all below standards.
机译：研究了黄河淤泥和赤泥生产的烧结砖的制备，特性及机理。测试了烧结收缩率，灼烧失重，吸水率和抗压强度，以确定最佳的制备条件。通过线性回归分析讨论了烧结机理。通过X射线衍射分析原料和砖的结晶成分。采用硫酸和硝酸法测定了原料和砖的浸出毒性。通过计算内部暴露指数和外部暴露指数来表征烧结砖的辐射安全性。结果表明，在选择的最佳参数下（红泥含量为40％，烧结温度为1050 C，烧结时间为2 h），可以获得烧结砖的最佳性能。烧结砖着火时的重量损失主要是由于除去吸收的水和结晶水造成的。烧结砖的烧结收缩率主要取决于赤泥的钠化合物和铁化合物。烧结过程使原料的某些成分转变成具有更好热稳定性的其他晶体。此外，在最佳条件下生产的烧结砖的浸出毒性和放射性指标均低于标准。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第2012期|p.53-61|共9页
  • 作者

    Hongtao He; Qinyan Yue; Yuan Su; Baoyu Gao; Yue Gao; Jingzhou Wang; Hui Yu;

  • 作者单位

    Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering. Shandong University, Jinan 250100, China;

    Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering. Shandong University, Jinan 250100, China;

    Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering. Shandong University, Jinan 250100, China;

    Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering. Shandong University, Jinan 250100, China;

    Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering. Shandong University, Jinan 250100, China;

    Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering. Shandong University, Jinan 250100, China;

    Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering. Shandong University, Jinan 250100, 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

    yellow river silt; red mud; sintered brick; weight loss mechanism; shrinkage mechanism;

    机译：黄河淤泥红泥烧结砖减肥机制;收缩机制;

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