Abstract: An improved and the related system for pneumatically transporting a powder or granular material placed in an airtight storage container through a transport pipe in high density. The material is formed into a long column in a horizontal upper pipe of the transport pipe and is transported at very slow speed and in high density by being performed such operation that the material is first increased and then reduced in speed and again accelerated while being moved up through a vertical riser pipe connected to the horizontal pipe and is once more reduced in speed when the material enters the horizontal upper pipe.

Abstract: An improved method and the related system for pneumatically transporting a powder or granular material placed in an airtight storage container through a transport pipe in high density. In the invention, pressurized gas is being intermittently supplied to the airtight storage container containing the material therein so as to take out of the container and a transport plug is being synchronously fed into the base of the transport pipe, whereby the powder or granular material is successively formed into a long column inside the transport pipe and is pneumatically transported at very slow speed.