Herein, the influence of ash adhesion characteristics on the slagging of Zhundong high-calcium coal (ZDc) has been firstly investigated via a self-designed measuring instrument. The results demonstrate that the early appearance and rapid growth in adhesion strength of ZDc ash are the important reasons for its serious slagging in the furnace, and the temperature plays an important role on the adhesion between ZDc ash and metal. From 800°C to 1000°C, the adhesion strength of ZDc gradually increases from 1.858 to 21.725 kPa. Meanwhile, the adhesion strength could increase rapidly due to the production of more liquid phase when the temperature exceeds 1000°C, and the adhesion strength is 184.933 at 1200°C. The calculation results via FactSage software also indicates that molten sulfate is the main component of liquid-phase ash and the enhancement of the CaO content contributes to promote the low-temperature eutectic of gehlenite, etc., thereby enhances the strengthen of the adhesion.

中文翻译：

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准东高钙粉煤灰高温对金属表面粘附特性的实验研究

在此，首次通过自行设计的测量仪研究了灰分粘附特性对准东高钙煤（ZDc）结渣的影响。结果表明，ZDc灰的早期出现和粘附强度的快速增长是其在炉内结渣严重的重要原因，而温度对ZDc灰与金属的粘附起重要作用。从 800°C 到 1000°C，ZDc 的粘附强度从 1.858 kPa 逐渐增加到 21.725 kPa。同时，当温度超过1000°C时，由于产生更多的液相，粘合强度会迅速增加，在1200°C时粘合强度为184.933。