A mobile tire processing unit comprising: a grinder which is adapted grind first tire pieces or full tires into second tire pieces of a second given size, wherein the second given size is chosen such that the components making up the full tire are substantially disunited following the grinding; a first separator positioned downstream of the grinder, the first separator being adapted to receive the second tire pieces from the grinder and to separate by means of gravity steel from the second tire pieces; a second separator positioned downstream of the first separator, the second separator being adapted to receive the second tire pieces less the separated steel and to separate by means of gravity textiles from the second tire pieces; and a receiver container, characterized in that the mobile tire processing unit further comprises: an air compressor for providing pressurized air to the mobile tire processing unit at a position downstream of grinder, the first separator receiving the pressurized air from the air compressor, the second separator also receiving the pressurized air from the air compressor; and a magnetic separator (6, 6') positioned downstream of the second separator and also receiving pressurized air from the air compressor, the magnetic separator (6. 6') being adapted to receive the second tire pieces less the separated steel and textiles and to retain along the tubing wall thereof further residual metallic impurities, such that substantially pure rubber is output from the magnetic separator (6. 6'), wherein the receiver container is positioned downstream of the magnetic separator (6, 6') and adapted to store the substantially pure rubber that is output from the magnetic separator (6, 6'). a grinder which is adapted grind first tire pieces or full tires into second tire pieces of a second given size, wherein the second given size is chosen such that the components making up the full tire are substantially disunited following the grinding; a first separator positioned downstream of the grinder, the first separator being adapted to receive the second tire pieces from the grinder and to separate by means of gravity steel from the second tire pieces; a second separator positioned downstream of the first separator, the second separator being adapted to receive the second tire pieces less the separated steel and to separate by means of gravity textiles from the second tire pieces; and a receiver container, an air compressor for providing pressurized air to the mobile tire processing unit at a position downstream of grinder, the first separator receiving the pressurized air from the air compressor, the second separator also receiving the pressurized air from the air compressor; and a magnetic separator (6, 6') positioned downstream of the second separator and also receiving pressurized air from the air compressor, the magnetic separator (6. 6') being adapted to receive the second tire pieces less the separated steel and textiles and to retain along the tubing wall thereof further residual metallic impurities, such that substantially pure rubber is output from the magnetic separator (6. 6'), wherein the receiver container is positioned downstream of the magnetic separator (6, 6') and adapted to store the substantially pure rubber that is output from the magnetic separator (6, 6').