CAJ | 학술논문

选取9类典型煤种，利用压差法测定烧结温度的实验装置，结合灰渣的 XRD 分析结果，考察了添加 K 基碱金属催化剂、不同煤种灰成分对烧结温度的影响。结果表明，碳酸钾催化剂的添加，明显降低高铁钙含量的 WJT 煤的灰熔点及烧结温度，碱金属 K 化合物极易同煤中 Fe、Ca 的矿物质反应生成低温共融物进而加剧煤灰的熔融结渣。不同煤种烧结温度的差异与煤灰中硅、铝、铁、钙含量密切相关。铝、硅含量高的煤灰烧结温度较高，而铁、钙含量高的煤灰烧结温度相对较低。碱金属K 催化剂的添加加剧了煤灰的烧结结渣，而钙、铁的存在会加速硅铝酸盐间的反应生成低温共融物进而加速灰熔融。各煤种烧结温度的变化与其灰成分在 CaO－SiO2－Al2 O3、FeO－SiO2－Al2 O3三元相图上的位置相吻合。
선취9류전형매충，이용압차법측정소결온도적실험장치，결합회사적 XRD 분석결과，고찰료첨가 K 기감금속최화제、불동매충회성분대소결온도적영향。결과표명，탄산갑최화제적첨가，명현강저고철개함량적 WJT 매적회용점급소결온도，감금속 K 화합물겁역동매중 Fe、Ca 적광물질반응생성저온공융물진이가극매회적용융결사。불동매충소결온도적차이여매회중규、려、철、개함량밀절상관。려、규함량고적매회소결온도교고，이철、개함량고적매회소결온도상대교저。감금속K 최화제적첨가가극료매회적소결결사，이개、철적존재회가속규려산염간적반응생성저온공융물진이가속회용융。각매충소결온도적변화여기회성분재 CaO－SiO2－Al2 O3、FeO－SiO2－Al2 O3삼원상도상적위치상문합。
A homemade pressurized pressure-drop measuring device and X-ray diffractometer (XRD) analyzer were used to determine the effects of alkali catalyst addition and different chemical compositions of nine kinds of coal ashes on the ash sintering temperature.The resultss how that the sintering temperature of WJT coal ash containing higher Fe and Ca compositions decl ines markedly after adding potassium carbonate catalyst.K minerals react easily with Fe and Ca minerals to produce low-me lting-point eutectics , which accelerates the sintering and agglomeration.The sintering temp eratures of var ious coal as hes ar e clos ely relat ed to the contents of Si, Al, Fe and Ca in coal ashe s.The sintering temperature sin crease for the coal ashw ith higher conte nt of silicon and aluminum, but decrease for the coal ash wi th higher content of calciuma nd iron in as h.Adding K catalyst can promote the slagging by forming eutectic matters, especially in the presence of calcium and iron. The thre -elemen t phase diagrams of CaO-SiO2-Al2 O3 , FeO-SiO2-Al2 O3 could explain the sinterin g tempera tures v ariance.