As a vertical mixing device, powdered carbon tank mainly used for the storage and mixing of powdered materials. It can prevent the accumulation and caking of materials, so that materials can enter the downstream equipment in the form of powder. It is suitable for industries such as carbon black, flour processing, cement, calcium powder, etc. A heat tracing device is set at the bottom of the tank, which can reduce the heat loss of materials and avoid the rise of tank wall temperature caused by materials hanging.