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首页> 外文期刊>Environmental Science & Technology >Use of Industrial Byproducts as Alumina Sources for the Synthesis of Calcium Sulfoaluminate Cements
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Use of Industrial Byproducts as Alumina Sources for the Synthesis of Calcium Sulfoaluminate Cements

机译：使用工业副产品作为氧化铝源来合成硫铝酸钙水泥

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摘要

Caldum sulfoaluminate (CSA) cements show some desirable environmentally friendly features that include the possibility of using several industrial byproducts as raw materialsintheir manufacturing process. Alumina powder, from the secondary aluminum manufacture, and anodizab'on mud, from the production process of anodized aluminum, have proved to be suitable as partial or total substitutes for an expensive natural material like bauxite. CSA clinker generating raw mixtures, containing limestone, natural gypsum, bauxite, and/or one of the alumina-rich byproducts, were heated 2 h in a laboratory electric oven at temperatures ranging from 1150 to 1300 °C. Conversion of reactants into 4CaO • 3A12O3 • SO3 (the key component of CSA cements), evaluated using X-ray diffraction (XRD) analysis, in- creased with an increase of both burning temperature and byproduct concentration. When examined through differential thermogravimetric and XRD analyses, a synthetic CSA clinker (made from the raw mixture incorporating alumina powder as a total replacement of bauxite) mixed with 20% gypsum showed a hydration behavior almost similar to that of an industrial CSA cement containing the same amount of gypsum.
机译：硫铝酸钙（CSA）水泥显示出一些理想的对环境友好的特征，包括在其制造过程中可能使用几种工业副产品作为原材料的可能性。来自二次铝生产的氧化铝粉末和来自阳极氧化铝生产过程的阳极氧化泥已被证明适合作为部分或全部替代昂贵的天然材料（如铝土矿）。将生成CSA熟料的原始混合物（包含石灰石，天然石膏，铝土矿和/或一种富含氧化铝的副产物）在实验室电烤箱中于1150至1300°C的温度下加热2小时。使用X射线衍射（XRD）分析评估，反应物转化为4CaO•3A12O3•SO3（CSA水泥的关键成分）的过程随着燃烧温度和副产物浓度的增加而增加。通过差示热重分析和XRD分析检查时，与20％石膏混合的合成CSA熟料（由掺入氧化铝粉末作为铝土矿的总替代品的原料混合物制成）显示出的水化行为几乎与包含CSA的工业CSA水泥相似石膏量。

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  • 来源
    《Environmental Science & Technology》 |2011年第14期|p.6124-6128|共5页
  • 作者

    Maria Lucia Pace; Antonio Telesca; Milena Marroccoli; Gian Lorenzo Valenti;

  • 作者单位

    Dipartimento di Ingegneria e Fisica delTAmbiente, Universita degli Studi della Basilicata, Viale dell'Ateneo Lucano 10, 85100 Potenza, Italy;

    Dipartimento di Ingegneria e Fisica delTAmbiente, Universita degli Studi della Basilicata, Viale dell'Ateneo Lucano 10, 85100 Potenza, Italy;

    Dipartimento di Ingegneria e Fisica delTAmbiente, Universita degli Studi della Basilicata, Viale dell'Ateneo Lucano 10, 85100 Potenza, Italy;

    Dipartimento di Ingegneria e Fisica delTAmbiente, Universita degli Studi della Basilicata, Viale dell'Ateneo Lucano 10, 85100 Potenza, Italy;

  • 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);
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