The effects of high silicon-aluminum coal ashes (Shajuzi coal ash (SJZA) and Pingshuo coal ash (PSA)) on the sintering and fusion behaviors of a potassium-rich biomass ash (cotton stalk ash (CSA)) were investigated by a horizontal tube furnace and an ash fusion temperature (AFT) analyzer. X-ray diffraction (XRD), thermogravimetry and differential scanning calorimetry (TG-DSC) techniques were applied to analyze the mineral transformations and thermal behaviors of the ash samples. As the coal ash mass ratio varied from 0 to 50%, the sintering degree of CSA/SJZA and CSA/PSA mixtures gradually mitigated. The AFTs of the two groups of mixtures all presented parabolic with respect to coal ash ratio. The potassium content in CSA was very high (K₂O, 39.55%), and K-containing minerals mainly existed as low melting point (MP) matters, i.e., sylvite (KCl), arcanite (K₂SO₄), potassium carbonate (K₂CO₃), and fairchildite (K₂Ca(CO₃)₂). The mitigation of sintering degree was ascribed to a decrease in KCl content with increasing coal ash ratio. When the coal ash ratio was less than 20%, the decrease in AFT was due to the consumption of alkaline earth metal oxide and the formation of K silicate. The conversions of low MP K salts to high MP K–Al silicates (kalsite (KAlSiO₄) and nepheline (KNa₃Al₄Si₄O₁₆)) and the formations of other high MP minerals increased the AFTs after adding 20% coal ash. The thermogravimetric analysis showed that the endothermic peak of KCl evaporation weakened to disappear and the exothermic peaks of some reactions enhanced with rising coal ash ratio.

通过水平研究了高硅铝粉煤灰（Sha鞠子粉煤灰（SJZA）和平朔粉煤灰（PSA））对富含钾的生物质粉煤灰的烧结和熔合行为的影响。管式炉和灰熔融温度（AFT）分析仪。利用X射线衍射（XRD），热重分析和差示扫描量热法（TG-DSC）技术分析了灰分样品的矿物相变和热行为。随着煤灰质量比从0到50％变化，CSA / SJZA和CSA / PSA混合物的烧结度逐渐降低。两组混合物的AFT均相对于煤灰比呈抛物线形。CSA中的钾含量非常高（K ₂O，39.55％）和含K矿物主要以低熔点（MP）物质形式存在，例如：钾盐（KCl），亚氯酸盐（K ₂ SO ₄），碳酸钾（K ₂ CO ₃）和磷灰石（K ₂ Ca（CO ₃）₂）。烧结度的降低归因于随着煤灰比的增加，KCl含量降低。当煤灰比小于20％时，AFT的降低是由于碱土金属氧化物的消耗和硅酸钾的形成。低MP K盐向高MP K-Al硅酸盐（钾盐（KAlSiO ₄）和霞石（KNa ₃ Al ₄ Si ₄ O ）的转化₁₆））和其他高MP矿物的形成增加了20％的煤灰后的AFT。热重分析表明，随着煤灰比的升高，KCl蒸发的吸热峰减弱而消失，某些反应的放热峰增强。