Flue gas treatment process for secondary metal rotary metallurgical furnace

The invention belongs to the technical field of flue gas treatment, and particularly discloses a process for treating flue gas of a secondary metal rotary metallurgical furnace, which comprises the following steps: circularly collected flue gas generated by the secondary metal rotary metallurgical furnace and mixed flue gas generated by other systems are dedusted and cooled by a high-efficiency washer, and then are sent into a flue gas purification combined tower; mixed flue gas is cooled and dedusted through a flue gas purification combined tower and a first-stage electric demister, then the mixed flue gas is sent into an absorption tower and a desorption tower for desulfurization treatment, and the mixed flue gas is sent into a process preservation tower for SO2 desulfurization preservation after being subjected to desulfurization treatment through a process absorption tower; flue gas generated during smelting of the regenerated metal rotary metallurgical furnace is subjected to coordinated and matched trea