Patent ID: 6468345
Filing Date: 2002-10-22
Classification: B01D,C04B,Y02P,Y02W,Y10S

Abstract:
A process for simultaneously producing steam power and fast-burnt cement clinker in a single coal powder-burning boiler system in which steam having a high temperature and high pressure is produced for delivery to a steam power user comprising blending raw coal with AMC to form an admixture, said AMC comprising a calcium-rich substance in the form of CaO; homogeneously mixing the blended coal mixture, grinding the homogeneously mixed coal mixture into a powder having a fineness of 4,900 opening/cm2 with a sieve residue of less than 30%, injecting the powder thus obtained into a furnace chamber and burning the powder at a high temperature above 1300Â° C. to produce high pressure steam from the apparatus and effect reaction between the AMC and coal ash produced by the combustion to form fast-burnt cement clinker, wherein the amount of AMC blended with the raw coal pro ides a fast-burnt cement clinker having a Ca content expressed at CaO % by weight in the range from 30-65% based on the total weight of the fast-burnt cement clinker.