ES427073A1 - Procedure for the preheating of fine granulation pulverulent material. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Process for the preheating of pulverulent material or of fine granulation, especially raw cement flour in a combined preheater of equal-counter current currents, characterized by the fact that the material is introduced through a loading device (1 ) in a partial system 1 of the preheater. It is preheated, separated from the gas stream in a cyclone (2), introduced through a cyclone return (3 "b) and/or cyclone return (3a) and a regulating tube (12) into a tube ascending (5) and mixed with a hot stream of gas-material that enters the riser (5) from a turbulence chamber (4) belonging to the partial system 2, adjusting the material stream so that the volatile components they are completely condensed from the gas stream, separated in a cyclone (6) from a partial system 2, the gas that enters an ascending tube (7) of the partial system 1, enters through a cyclone return ( 8b) and/or cyclone return (8a) and a regulating tube (13) in a turbulence chamber (4) heated in such a way that the sublimation of the volatile components begins, is here with a gas-material combination introduced. From a partial system 3 and undergoes further heating, such that a condensation takes place said volatile elements with higher sublimation temperatures, is introduced into the partial system 3 and is conducted through several stages of well (9) of large dimensions and arrives through the inlet channel (14) to the rotary kiln (10) while the gas, after leaving the partial system 1, is purified in a separation step (11) of the material components and leaves the system as exhaust gas. (Machine-translation by Google Translate, not legally binding)