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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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煤催化气化条件下不同煤种煤灰烧结行为研究
, PP. 402-409
Keywords: 煤催化气化,烧结温度,压差法测定技术,煤灰成分,相图
Abstract:
？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-al2o3、feo-sio2-al2o3三元相图上的位置相吻合。
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