Method for preparing briquette coal from fly ash of coal-fired boiler

The invention discloses a method for preparing briquette from coal-fired boiler fly ash, and belongs to the technical field of briquette preparation. The coal-fired boiler fly ash is subjected to reduction treatment with ammonia gas, cellulose acetate is used as a carbon source, and an oxygen-enriched carbon material is prepared through hydrothermal carbonization; then, the fly ash subjected to epoxy treatment, an oxygen-enriched carbon material, high-quality coal powder and the like are matched, bonded and pressed to prepare the briquette coal. According to the invention, oxidation-reduction bonding bonding induced by a high-temperature condition is utilized, so that the bonding strength of the briquette coal at a high temperature is improved, and meanwhile, the briquette coal also has a high calorific value. 本发明公开了一种用燃煤锅炉飞灰制备型煤的方法，属于型煤制备技术领域，将燃煤锅炉飞灰以氨气进行还原处理，以纤维素乙酸酯为碳源，通过水热碳化制备为富氧碳材料，再将环氧处理的飞灰与富氧碳材料、优质煤粉等配合粘结压型制得所述型煤；本发明利用高温条件诱发的氧化还原键合粘结，提高了型煤在高温下的粘结强度，同时还兼具高的发热量。