Media-agitation type pulverizer

摘要

A media-agitation pulverizer is capable of creating a uniformized, stable helicoidal flow in a mixture of pulverizing media and a raw material slurry, thereby performing pulverization/dispersion uniformly with satisfactory energy efficiency. The media-agitation pulverizer includes a guide ring installed to radially divide a lower region of a pulverization chamber into an inner section and an annular outer section, whereby a flow of a mixture of a raw material slurry and pulverizing media is formed as a helicoidal flow including a secondary flow flowing through a circulation flow path with respect to the guide ring; and rotational-flow suppressing device is provided within the pulverization chamber and adapted to strengthen the secondary flow of the helicoidal flow, thereby stabilizing the helicoidal flow.

主权项

1. A media-agitation pulverizer comprising:
a pulverization container including an end plate closing up an upper end thereof and having an upright cylindrical pulverization chamber containing pulverizing media in the form of beads; a raw-material-slurry supply port provided in the pulverization container; an agitating member disposed in a bottom region of the pulverization chamber and having a rotary shaft substantially coaxial with a central axis of the pulverization chamber; and a media separation member provided within the pulverization chamber and above the agitating member, the media-agitation pulverizer being characterized in that it further comprises: a guide ring installed to radially divide a lower region of the pulverization chamber into an inner section and an annular outer section, whereby a flow of a mixture of the raw material slurry and the pulverizing media is formed as a helicoidal flow comprising a combination of a primary flow flowing in a circumferential direction of the pulverization chamber and a secondary flow flowing through a circulation flow path which has an upward flow path and a downward flow path created, respectively, in the outer section and the inner section of the lower region of the pulverization chamber, with respect to the guide ring; and rotational-flow suppressing means provided within the pulverization chamber for controlling the helicoidal flow to suppress the primary flow while strengthening the secondary flow, thereby stabilizing the helicoidal flow, the rotational-flow suppressing means being formed in a cruciform shape, and provided in the guide ring, and the guide ring with the rotational-flow suppressing means being provided above the agitating member.