The Automation of the Unloading or Recycling Process of the Fly Ash from the Silos in Cement Mills

Abstract

Fly ash is one of the main ingredients used to produce some sorts of cement (like Portland cement). The fly ash manipulation system is made up of over 20 electric motors and 70 valves. In order to control these, only two function blocks will be created (one for the electric motors and one for the valves). In the unique program which controls the process, universal start/stop commands will be sent to the electric motors and open/close commands to the valves. These commands will be accepted if the corresponding values from an enabling vector are true. The particular program described in this article has been implemented for the fly ash storage system from Rupea used by the cement mill near Hoghiz.