Abstract
They tried the jet grinding of brittle materials by a new apparatus, which is similar to the air ejector in its construction. Fig. 2 shows the main part of this mill. The pulverizing mechanism was assumed from the view point of pressure distribution and size distribution of the grinding producis.
The experimental results show that D-2 type diffuser is most efficiencial for pulverizing as shown in Fig. 10.
The pressure distribution in D-2 type diffuser is shown in Fig. 4 and the slze distribution in Fig. 7 in the form of Rosin-Rammler diagram.
The relative position of the air nozzle to the entrance of feed of material is also effective for pulverizing as shown in Fig. 12.
It is concluded that the pulverization is performed by the following two methods.
(1) The pulverization by the collision of feed materials in front of the air nozzle.
(2) The pulverization by the collision and mixing at the diffuser.
