Effect of sodium oxide content on ash sintering strength of high alkali coal

QI Chao; XIAO Haiping; WANG Dongxu; KANG Zhizhong; SUN Baomin

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Effect of sodium oxide content on ash sintering strength of high alkali coal

Thermal Power Generation Issue 12, (2017)

更新时间：2025-09-28

- Effect of sodium oxide content on ash sintering strength of high alkali coal
- 作者机构：
  
  华北电力大学能源动力与机械工程学院,北京,102206
- 作者简介：
- 基金信息：
- DOI：
  CLC： TQ536.4
- Published Online：04 January 2018，
  
  Published：2017
- 稿件说明：
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QI Chao, XIAO Haiping, WANG Dongxu, et al. Effect of sodium oxide content on ash sintering strength of high alkali coal[J]. Thermal Power Generation, 2017, (12).
DOI：

QI Chao, XIAO Haiping, WANG Dongxu, et al. Effect of sodium oxide content on ash sintering strength of high alkali coal[J]. Thermal Power Generation, 2017, (12). DOI：

摘要

为研究Na2O质量分数对高碱合成灰烧结强度的影响，将不同Na2O质量分数的合成灰制成灰柱并在管式炉中进行烧结实验，使用微机控制万能测试机对灰柱烧结强度进行了测试，使用X射线衍射（XRD）、扫描电子显微镜（SEM）对合成灰的矿物质组成以及微观形貌进行了检测和观察。结果表明：随着Na2O质量分数的增加，灰柱烧结强度不断增加，灰中含钠物质逐渐由钠长石转化为霞石，含钙物质逐渐由钙长石转化为硅灰石和钙黄长石；霞石、硅灰石、钙黄长石等矿物质形成的低温共熔体会使体系中产生大量液相，促进灰质点扩散过程，使灰柱烧结强度增大；随着Na2O质量分数的增加，灰颗粒间孔隙不断减小，表面由粗糙疏松变得光滑致密。

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