Emissions from cement plants vary widely in the volume and composition due to the differences in the processes, in-plant practices, housekeeping and other factors.
The wet process is being displaced by the dry process because of saving in energy, accurate control and mixing of the raw mixture. The following figure describes the main process units at the cement plant with their corresponding emissions/effluents from the dry and wet production processes.
Moreover, medium and large size plants will have some or all of the following services and auxiliary units. These units can be pollution sources and therefore should be inspected and monitored. The following figure shows the various auxiliary units at the cement plant with their corresponding potential emissions/effluents.