method and device for the production of zementklinker

摘要

A process is disclosed for producing cement clinker, comprising the steps of: a) providing a mixture of ground calcareous materials and ground argillaceous materials; b) heating the mixture of step a) to a temperature sufficient to calcine and fuse the ground materials to form the cement clinker, and thereby producing an exhaust gas containing COSUB2/SUB; c) catalysing the hydration of at least a portion of the CO2 contained in the exhaust gas and producing a solution containing bicarbonate ions and hydrogen ions; and d) adding to the solution obtained in step c) metal ions, and adjusting the pH of the solution to precipitate a carbonate or said metal. Preferably, the metal ions are CaSUP++/SUP obtained from the dissolution of a material selected from the group consisting of CaClSUB2/SUB, cement kiln dust and sea salts and the carbonate is CaCOSUB3 /SUBwhich is advantageously recycled into the process by adding the CaCOSUB3 /SUBto the mixture of step a). A cement plant for performing this process is also disclosed.