Impeller assembly and solid-liquid mixing device using same

A solid-liquid mixing device using an impeller assembly, comprising a housing and an impeller, the impeller comprising a truncated conical body, and multiple mixing blades being formed from top to bottom on an inclined surface of the body, wherein the impeller assembly further comprises at least two blocking plates provided on an outer side of a lower portion of the body, wherein one of the at least two blocking plates is fixed on the impeller of the impeller assembly, and another one of the at least two blocking plates is fixed on the housing of the solid-liquid mixing device;

• wherein gaps between the at least two blocking plates, gaps between the one of the at least two blocking plates on the impeller and the housing, and gaps between the another one of the at least two blocking plates on the housing and the impeller jointly form flow channels of a suspension.