Practical application of automation control in metallurgical industry

Analysis of the status quo of integrated automation control in the metallurgical industry: Aspects of process modeling. In the metallurgical industry of Henan Yongyin Chemical Industry Co., Ltd., the process computer mainly plays the role of data aggregation, process monitoring, report printing and so on. The metallurgical production process has a certain complexity. Due to the poor adaptability of the mathematical model, the function of process optimization is unsatisfactory. Even if the advanced process automation control system is imported from abroad at a high price, it is difficult to play its due role. To this end, organically combining process knowledge, mathematical models, expert experience and intelligent technology to realize the process model and optimization of key stations such as ironmaking, steelmaking, continuous casting, etc. will be a key research topic in the future.

Informatization. With the advent of the information age, the importance of information technology has become increasingly prominent. For domestic metallurgical enterprises, how to make information play the greatest role is a key link for enterprises to strengthen. Informatization is a historic revolution in the internal management of metallurgical enterprises. If it is not handled properly, it will have a certain impact on the future development of the enterprise. The application level is also far from that of large metallurgical enterprises, so it is necessary to increase the construction of informatization, so that the role of informatization can be brought into full play.

Research on the specific application of automation network control technology in the metallurgical industry: In the metallurgical production of Henan Yongyin Chemical Industry Co., Ltd., the comprehensive control system adopts a hierarchical structure, of which level 0 is the acquisition execution layer, which is mainly responsible for the measurement and control of related physical quantities. Execution of instructions; Level 1 is the control layer, that is, basic automation, which is responsible for the centralized control of the metallurgical production process; Level 2 is the production model, which is mainly used for the optimization of production control; Level 3 is the production management and scheduling system, Responsible for coordinating the collaborative work between various production processes; Level 4 is the enterprise information layer.

Each of the above layers requires a corresponding network to connect them into an organic whole. Under normal circumstances, most of the layers at level 2 and above use Ethernet connections, and layers at level 1 and below use dedicated networks, and use dedicated control equipment and related software. The seamless combination of networks is the difficulty and focus of metallurgical enterprises to realize comprehensive automation control. The most effective way to solve this problem is to apply industrial Ethernet technology, which will be discussed in detail below.

Metallurgy is a relatively special industry. In the process of continuous development, metallurgical enterprises need to build a large number of production lines and upgrade existing production lines in order to meet the needs of the market. In the process of renovation and new construction, due to the limitation of the level of automation control technology at that time, or the different design units hired, there are many types of automation control systems, which to a certain extent causes the phenomenon of isolated islands in the automation control system in the metallurgical industry. . Although the field bus technology also has a certain advanced nature, but it can not meet the interconnection requirements of heterogeneous buses. At this stage, with the continuous development and improvement of computer technology and network technology, Ethernet, which was originally used in office and business, has gradually penetrated into the field of industrial control. The controllers manufactured by international automation manufacturers also provide Ethernet TCP/IP interfaces. Individual manufacturers have also introduced I/O products.

The characteristics of Ethernet can be roughly summarized into the following aspects: first, the data transmission rate is high, which can provide sufficient bandwidth; second, the communication protocol is the same, and it can also run different transmission protocols on the same bus, which helps The enterprise establishes a public network platform; thirdly, the current relatively advanced interactive and open data access technology is used in the network, and the performance in all aspects is more stable; fourthly, due to the long use time, most technical personnel They are very familiar with them, and a wide range of setup, maintenance and diagnostic tools can be provided on the market, and operational reliability has been effectively guaranteed; fifth, different physical media can be used, and different network topologies can be formed.

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