Patent ID: 9636684
Date: 2017-05-02
CPC Classifications: B02C,F23K

Claim:
1. A vertical pulverizing apparatus comprising: a housing; a pulverizing table which is placed rotatably inside the housing; a pulverizer which is disposed on the pulverizing table; a throat which is disposed between the housing and the pulverizing table; a wind box which is placed under the throat; and a conveying gas feeding unit which feeds pulverized particle conveying gas to the wind box, the throat having an annular flow channel which is surrounded by a throat inner peripheral wall and a throat outer peripheral wall and which is configured to be partitioned by a large number of throat vanes circumferentially at predetermined intervals so that a solid raw material can be pulverized to produce pulverized particles by meshing of the pulverizing table with the pulverizer, and the conveying gas fed from the conveying gas feeding unit to the wind box can be jetted to an outer peripheral part of the pulverizing table through the throat so as to convey the pulverized particles to above the pulverizing table; wherein: a slope part extending diagonally downward from an inner peripheral wall surface of the housing toward a top end of the throat outer peripheral wall and a horizontal part extending from a bottom end of the slope part continuously to the top end of the throat outer peripheral wall are provided all over the circumference between the housing and the throat; and top end surfaces of the throat vanes and a top surface of the horizontal part are set at the same height.