Processing system and method of processing cement kiln combustion gas bleed dust

摘要

While holding low operating costs, and to efficiently remove lead from cement kiln combustion gas extraction and dust [challenge] the equipment cost. And probe 3 to bleed while cooling the combustion gas from the exhaust gas flow path to the cyclone at the bottom from the kiln ass [MEANS FOR SOLVING PROBLEMS] cement kiln 2, classification of the first to separate the coarse particles of dust in the combustion gas was bled the machine 5, and a dust collector 7 for dust collecting the extracted gas containing fine powder discharged from the classifier 5 first, a classifier 8 of the second separated into a coarse powder and fine powder dust discharged from the dust collector 7 1 and the like processing system comprises a. Since the lead localized on fine side was classified with a classifier 8 of a second, it is possible to remove the lead efficiently without using chemicals or the like. The recycled cake of high lead concentrations washed desalting fine powder was classified by a classifier 8, was obtained after washing with water, can be added to the cement mill saline. The coarse powder, can also be either added to the cement grinding process, is returned to a cement raw material grinding process after desalting and washing with water. [Selection] Figure Figure 1