Blast system

A blast system for processing components by means of abrasive particles, comprising a hopper (1) for abrasive particles (2), a mixing device (3) formed by a mixing chamber (9) into which an HP-air pipe (10) issues and which in its turn issues into a blast pipe (11), a transport line (5) between the hopper and the mixing chamber, through which line the abrasive particles are transported from the hopper to the mixing chamber, means (6) for generating HP-air (P) which is supplied to the mixing chamber through the HP-air pipe for obtaining a mixture of air and abrasive particles issuing from the blast pipe, and a transport mechanism (4) for transporting the abrasive particles through the transport line. To obtain an energy-efficient system suitable for mass manufacture, the invention is characterized in that the system operates at an absolute pressure (P) of the HP-air of between 2 and 4.5 bar, while a ratio d1/d2 of a smallest diameter d1 of the HP-air pipe issuing into the mixing chamber to a smallest diameter d2 of the blast pipe lies between 0.6 and 0.9, while P