Treatment device

1. A processing system comprising:

a diffusion processing section which heats an RH diffusion source made of either a metal or alloy of a heavy rare-earth element RH (which is at least one of Dy and Tb) and a sintered R-T-B based magnet body while rotating;

a sorting section which is adjacent to the diffusion processing section and which selectively sorts the RH diffusion source from the sintered R-T-B based magnet body when the diffusion source and the magnet body come from the diffusion processing section;

a heat treatment processing section which is adjacent to the sorting section and which conducts a heat treatment process on the sintered R-T-B based magnet body, in which the heavy rare-earth element RH has been diffused by the diffusion processing section and from which the RH diffusion source has been removed, while rotating;

a tilting mechanism which changes at least the diffusion processing section, the sorting section, and the heat treatment processing section between a tilted position and a level position during a process including diffusion, sorting, and heat treatment steps; wherein

the diffusion processing section:

includes a first cylindrical inner wall portion which houses the RH diffusion source and the sintered R-T-B based magnet body;

includes a first spiral baffle arranged on the first cylindrical inner wall portion; and

passes the RH diffusion source and the sintered R-T-B based magnet body to the sorting section while being rotated;

the sorting section:

includes a second cylindrical inner wall portion which houses the RH diffusion source and the sintered R-T-B based magnet body and which has holes;

ejects the RH diffusion source through the holes out of itself while moving the RH diffusion source and the sintered R-T-B based magnet body that have come from the diffusion processing section toward the heat treatment processing section; and

passes the sintered R-T-B based magnet body to the heat treatment processing section while being rotated;

the heat treatment processing section:

includes a third cylindrical inner wall portion which houses the sintered R-T-B based magnet body;

includes a second spiral baffle arranged on the third cylindrical inner wall portion; and

ejects the sintered R-T-B based magnet body through an outlet port while being rotated; and

the first spiral baffle is arranged so that its spiral direction is reverse to that of the second spiral baffle.

2. The processing system of claim 1 , wherein the diffusion processing section has a first outer wall portion that surrounds the first inner wall portion, and

wherein the sorting section has a second outer wall portion that surrounds the second inner wall portion, and

wherein the heat treatment processing section has a third outer wall portion that surrounds the third inner wall portion, and

wherein at least the first and third inner wall portions have a cylindrical shape and are made of either a metal or alloy including at least one of Mo, W, Nb and Ta.

3. The processing system of claim 1 , wherein a sheet-like padding member is arranged between each said pair of inner and outer wall portions.