Mechanical flow aid

Salt is delivered by ship, barge, train, and truck. Bulk solids unloading is by various methods, usually labor-intensive, which are not discussed here. Vibration during transit can pack the salt to the point where it resists flow. When mechanical flow aids are called for, Kaufmann [32] recommends heavy-duty large-amplitude vibrators. 

If changing the properties of the bulk solid is not practical, consideration should be given to enlarging the outlet and feeder or using a mechanical flow aid such as an air cannon, external vibrator, vibrating discharger, internal agitator, flexible walls, etc. 

When referring to optional materials, this generally refers to the material of construction of the discharge cone and the receiving hopper. These are available in a number of materials from food quality stainless steel to mild steel. When selecting for a food application, it is also important to ensure that the rubber seal materials are also compliant with regulations. Apart from the mechanical flow aids, some sysfems are also available with pneumatic... 

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