Patent ID: 6050203
Filing Date: 2000-04-18
Classification: C04B,F23G,F23J,F27B,F27D,Y02E,Y02P

Abstract:
A method of manufacturing cement in a rotary cement kiln having a heated, rotating vessel containing, during operation, in-process mineral material and an apparatus for charging combustible solids into a heated zone of the vessel where the in-process mineral material is in a calcining state, said apparatus comprising an open port in the rotary vessel, a drop tube extending from the open port into the kiln cylinder to prevent in-process mineral material from escaping through the port during kiln rotation, and a stationary fuel receiving chute positioned so that it comes into alignment with the open port once on each revolution of the rotary vessel, said method comprising the steps of positioning combustible solids on the stationary fuel receiving chute, delivering the solids through the open port in the vessel under the force of gravity, and drawing air through the open port and the drop tube continuously during kiln operation.