Process for removing sulfur dioxide and heavy metal thallium in lepidolite sintering flue gas

The invention relates to the field of sintering flue gas treatment, in particular to a process for removing sulfur dioxide and heavy metal thallium in lepidolite sintering flue gas, which comprises the following steps: S1, pressurization: collecting and discharging the lepidolite sintering flue gas into a booster fan, and pressurizing the lepidolite sintering flue gas by the booster fan when the lepidolite sintering flue gas passes through the booster fan; s2, desulfurization is conducted, specifically, the pressurized lepidolite sintering flue gas is discharged into a desulfurization and thallium removal tower containing an absorbent, the main component of the absorbent is lime slurry, namely calcium hydroxide, and sulfur dioxide and thallium in the lepidolite sintering flue gas react with the lime slurry. The flue gas is in reverse contact with an absorbent, namely lime slurry, in the desulfurization and thallium removal tower in the tower to generate calcium sulfite and thallium hydroxide, so that sulfur a