Patent ID: 9676664
Date: 2017-06-13
CPC Classifications: C04B,F27B,F27D

Claim:
1. A cement production apparatus comprising: a plurality of cyclones vertically connected to each other, and in which exhaust gas generated in a cement kiln can flow; a duct provided between cyclones at an upper stage and a cyclone at a lower stage among said plurality of cyclones, wherein the duct is provided below the cyclones at the upper stage and provides a distribution part among the cyclones at the upper stage, and wherein exhaust gas flowing from the cyclone at the lower stage flows upward in the duct and is distributed to the cyclones at the upper stage; a material-supplying pipe for supplying cement raw material connected to the duct at a position below the distribution part among the cyclones at the upper stage; and a material-guiding chute protruding into the duct from a connection part of the material-supplying pipe to the duct, so as to drop the cement raw material being supplied from the material-supplying pipe into the duct, wherein the material-guiding chute is formed to have a flat upper surface and to be expandable by sliding so that an insertion depth of a tip end of the material-guiding chute from an inner-wall surface of the duct at the connection part is 0.15 times to 0.5 times an inner diameter of the duct.