Solid-liquid separation device for separating desulfuration residues in steel plant

The utility model relates to a solid-liquid separation device for separating desulfuration residues in a steel plant. The solid-liquid separation device comprises a stirring device body provided with an inner cylinder (2) with drainage holes, an outer cylinder (3) which is arranged on the outer side face of the inner cylinder (2), and at least two liquid extraction devices which are arranged between the inner cylinder (2) and the outer cylinder (3) and are distributed in an interval area; the stirring device body is used for separating additives between the inner cylinder (2) and the outer cylinder (3); the additives are discharged annularly along the inner cylinder (2) through the working of the liquid traction devices in turn, and the additives are not discharged directly, thus solid objects are washed in an impact manner when the additives are discharged, and the purity of sorting materials is improved.