The invention provides a preparation method of a high-concentration
binary compound fertilizer, which uses a preparation device of the high-concentration
binary compound fertilizer, and the device comprises a support frame, a conveying
granulation mechanism and a
granulation shearing mechanism. The preparation method can solve the following problems in the preparation process of the high-concentration
binary compound fertilizer: a, when the traditional binary compound fertilizer is prepared at present, the mixed viscous
slurry needs to be granulated to form granules so as to be conveniently bagged, stored and transported, the
extrusion mode is a basic method of
granulation, and when the
slurry is conveyed and extruded, the phenomenon of solidification and
caking often occurs, so that a conveying channel is blocked; and b, according to an existing granulation mode, after granulation is completed, an
extrusion head needs to be detached,
slurry in an
extrusion hole needs to be cleaned away, the extrusion hole is prevented from being blocked when the extrusion hole is not used for a long time, and the mode is clumsy, and only the most traditional mode is adopted.