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首页> 外文期刊>RSC Advances >The characteristics of mineralogy, morphology and sintering during co-combustion of Zhundong coal and oil shale
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The characteristics of mineralogy, morphology and sintering during co-combustion of Zhundong coal and oil shale

机译：抗煤油和油页岩共燃烧过程中矿物学，形态和烧结的特点

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摘要

The high-sodium coal from Zhundong region induces severe ash-related problems during combustion. Oil shale rich in silicon and aluminum has been adopted as an additive of Zhundong coal during co-combustion to investigate the characteristics of mineralogy, morphology and sintering at various temperatures and blending ratios in this study. The size distributions of the ash depositions have also been determined. The study results reveal that the fluxing minerals, such as sodium-based compounds, with sizes less than 10 mu m are dominant in Zhundong coal. These fine particles may present in a molten or sintering state at high temperature. Some refractory minerals with size exceeding 10 mu m, such as nepheline or anorthite, form during co-combustion. These irregular particles retain their shapes during combustion resulting from their high melting temperatures. The blending of oil shale can change the migration path of the sodium during combustion, indicating that sodium gradually migrates from the water-soluble phase to the aluminosilicate phase. The amount of ash particles less than 10 mu m decreases from 84.31% to 40.29% with an increase in temperature. Furthermore, the refractory minerals with high melting point and high viscosity can result in high sintering temperature. The sintering temperature increases from 700 degrees C to 1055 degrees C when the blending ratio of oil shale reaches 20% and combustion temperature reaches 1050 degrees C. In addition, 30-50% sodium-based compounds volatilize to the gaseous phase during combustion of Zhundong coal. When the proportion of oil shale reaches 10%, and combustion temperature is 850 degrees C, sodium volatility will decrease to the lowest point of 14.49%, which can suppress ash sintering to a large extent.
机译：来自逆东地区的高钠煤在燃烧过程中诱导严重的灰分相关问题。富含硅和铝的油页岩已被采用作为官能煤的添加剂在共燃烧过程中，研究了在本研究中各种温度和混合比的矿物学，形态和烧结的特征。还确定了灰分沉积的尺寸分布。研究结果表明，碳水化合物的碳水化合物等助熔剂矿物质，尺寸小于10亩，在逆转煤中占主导地位。这些细颗粒可以在高温下以熔融或烧结状态存在。一些耐火矿物，尺寸超过10μm，例如尼触或钙铜，在共燃烧期间的形式。这些不规则的颗粒在其高熔点温度引起的燃烧过程中保持它们的形状。油页岩的混合可以在燃烧过程中改变钠的迁移路径，表明钠逐渐从水溶性相迁移到硅铝酸盐相中。小于10μm的灰分颗粒的量从84.31％降至40.29％，随着温度的增加而降低。此外，具有高熔点和高粘度的耐火矿物可以导致烧结温度高。当油页岩的混合比率达到20％且燃烧温度达到1050℃时，烧结温度从700℃升高到1055摄氏度。此外，30-50％的钠基化合物在正通燃烧过程中挥发到气相中煤炭。当油页岩比例达到10％，燃烧温度为850℃时，挥发性将减少到14.49％的最低点，这可以在很大程度上抑制灰烧结。

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  • 来源
    《RSC Advances》 |2017年第81期|共10页
  • 作者

    Lu Yang; Wang Ying; Zhao Yuqiong; Wei Zheng; Li Yuan; Hao Wuxing; Zhang Yongfa;

  • 作者单位

    Taiyuan Univ Technol Key Lab Coal Sci &

    Technol Minist Educ &

    Shanxi Prov Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Key Lab Coal Sci &

    Technol Minist Educ &

    Shanxi Prov Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Key Lab Coal Sci &

    Technol Minist Educ &

    Shanxi Prov Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Key Lab Coal Sci &

    Technol Minist Educ &

    Shanxi Prov Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Key Lab Coal Sci &

    Technol Minist Educ &

    Shanxi Prov Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Key Lab Coal Sci &

    Technol Minist Educ &

    Shanxi Prov Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Key Lab Coal Sci &

    Technol Minist Educ &

    Shanxi Prov Taiyuan 030024 Shanxi Peoples R China;

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