Anchor-type agitators and frame-type agitators belong to the same category. The impeller diameter of this type of agitator is larger than the tank diameter. They often operate at low speeds and do not produce large noise when mixing low-viscosity liquids. Shear force is not suitable for liquid-liquid and gas-liquid dispersion. The flow rate near the tank wall is larger than other impellers, and a large heat transfer film coefficient can be obtained. Therefore, it is often used for heat transfer and crystallization operations, and is also suitable for mixing high-viscosity materials. .