ZAT has been in the opencast coal mining business for almost 60 years. Although the Green Deal has recently led to a move away from burning coal, the operations in the Czech Republic will require modernization and maintenance for several years to come.
ZAT has traditionally offered operators of opencast coal mines both the deployment of its own modern control systems and the professional implementation of control systems from other manufacturers. "We have long-standing competencies and a number of reference orders, so we can meet the specific requirements of our customers," says Milan Hucl, Director of the Smart Systems Division.
Ledvice Coal Preparation Plant Project
An example of a successful implementation by ZAT is the deployment of a Siemens control system at the Ledvice Coal Processing Plant belonging to Severočeské doly a.s. The goal of this major investment project, which involved several suppliers of mechanical and electrical parts, was to improve the efficiency of coal conveyor belt transport by installing new interconnection line technology. The essence of the streamlining was the separation of the already finished product Ořech 2 during its production and its targeting for truck loading in connection with the increased market demand for the product.
ZAT contributed to the project by supplying the control cabinet, including the installation of the control system and associated field instrumentation, as well as the development of the application software and relevant project documentation for the control of the conveyors belts. A Siemens S7-1500 industrial control system with inputs and outputs was used to control the newly added link line technology in accordance with the customer's requirements. From the control point of view, the number of signals processed was of an exceptionally large range. The addition of the new technology, however, required subsequent extensive modifications to the existing ZAT automation systems, which control downstream process equipment, and communicate with each other. The contract was completed and successfully commissioned at the end of 2021.
Photo source: Severočeské doly a.s.