Method and device for harmlessly treating electrolytic manganese residues

The invention discloses a method and a device for harmlessly treating electrolytic manganese residues, and relates to the technical field of application of solid waste treatment and environmental protection. The device comprises a manganese slag pretreatment system, an activating agent pretreatment system, a treating agent pretreatment system, a reaction system and a recovery system, the manganese slag pretreatment system, the activating agent pretreatment system and the treating agent pretreatment system are respectively connected with the reaction system, and the reaction system is connected with the recovery system; the method for harmlessly treating the electrolytic manganese residues comprises the steps that the manganese residues are added into a backwashing filter press to be treated, and first treated manganese residues are obtained; the first treated manganese slag is put into a soil crushing machine to be crushed, and second treated manganese slag is obtained; transferring the secondary treated mang