A particulate material blasting apparatus comprising: a particulate material dosing device ; a particulate material storage tank having a base , top and sidewalls and adapted to feed particulate material to the dosing device; and a delivery conduit to deliver particulate material into a pressurised gas line, the particulate material dosing device comprising a rotor comprising a series of scooping pockets mounted along a circumference of the rotor configured to rotate to scoop-up particulate material from a particulate material receiving side of the dosing device and deliver it up and around to a delivery side of the dosing device where it falls into the delivery conduit , the particulate material dosing device being located in the particulate material storage tank and the delivery conduit comprising an upper part, disposed within the particulate material storage tank , having a first inlet aperture and a lower part, disposed outside the particulate material storage tank , having an outlet to deliver particulate material into a pressurised gas line, characterised in that the upper part comprises an elongated pipe , in that the first inlet aperture is disposed adjacent the base of the particulate material storage tank, wherein the rotor is mounted partly within the first inlet aperture such that a particulate material receiving side of the rotor is disposed outside the pipe and a particulate material delivery side of the rotor is disposed inside the pipe and in that the upper part of the delivery conduit comprises a second inlet aperture disposed toward a top of the particulate material storage tank. a particulate material dosing device ; a particulate material storage tank having a base , top and sidewalls and adapted to feed particulate material to the dosing device; and a delivery conduit to deliver particulate material into a pressurised gas line, the particulate material dosing device comprising a rotor comprising a series of scooping pockets mounted along a circumference of the rotor configured to rotate to scoop-up particulate material from a particulate material receiving side of the dosing device and deliver it up and around to a delivery side of the dosing device where it falls into the delivery conduit , the particulate material dosing device being located in the particulate material storage tank and the delivery conduit comprising an upper part, disposed within the particulate material storage tank , having a first inlet aperture and a lower part, disposed outside the particulate material storage tank , having an outlet to deliver particulate material into a pressurised gas line, characterised in that the upper part comprises an elongated pipe , in that the first inlet aperture is disposed adjacent the base of the particulate material storage tank, wherein the rotor is mounted partly within the first inlet aperture such that a particulate material receiving side of the rotor is disposed outside the pipe and a particulate material delivery side of the rotor is disposed inside the pipe and in that the upper part of the delivery conduit comprises a second inlet aperture disposed toward a top of the particulate material storage tank. <EOS>