Lithium salt raw material pre-reaction system

The invention discloses a lithium salt raw material pre-reaction system which comprises a reaction container, a heat exchange jacket; the heat exchange medium replacing mechanism comprises a left side fixed partition plate and a right side fixed partition plate which are fixedly connected between the heat exchange jacket and the reaction container, a material changing and discharging pipe is arranged at the bottom of the heat exchange jacket between the left side fixed partition plate and the right side fixed partition plate, and the heat exchange jacket is rotationally provided with a group of fixed ring pieces; a movable partition plate fixedly connected to the fixed ring piece is movably mounted on the right side of the right fixed partition plate; the transverse mixing mechanism comprises a driving pipe fitting, and a group of guide long holes are formed in two sides of the driving pipe fitting; and the longitudinal material turning mechanism comprises a driving screw rod which can be rotatably sleeved in