The mixing tank, also known as mixing tank and mixing barrel, is a three-layer structure with an upper opening and a lower oblique bottom. It has the functions of heating, automatic temperature control, heat preservation and mixing. It has the advantages of fast heat transfer, large temperature difference and convenient cleaning. Widely used in food (milk) products, pharmaceuticals, daily chemicals, beverages, grease, chemical industry, pigments and other industries as intermediate buffer, liquid storage, stirring, dispensing equipment (in the case of materials without heating and uniform dispensing, the equipment is the most economical and practical), heating, mixed dispensing or sterilization treatment. It is especially suitable for small and pilot-scale use in units and scientific research institutes without steam heat source. It can adopt fully enclosed structure and heat preservation structure according to process requirements.