Informatization injects vitality into metallurgical automation. Fieldbus technology has a large application space
editor's note: automation in China's metallurgical industry has developed rapidly. Under the requirements of process optimization and informatization, PLC, DCS, FCS, etc. are the main control equipment, and the control level has also reached the quasi unmanned level. In recent years, some large iron and steel enterprises in China have basically realized the informatization of the whole plant, and the three-level structure of bps/mes/pcs has appeared in the control systemGkong in recent years, the external competitive environment faced by steel enterprises has undergone earth shaking changes. In terms of energy consumption, the energy consumption of the iron and steel industry accounts for about 11% of China's total energy consumption. Compared with the world's advanced level, the energy consumption per ton of steel is 10% higher; In terms of customer service, customers' demands for steel varieties and specifications are more and more diversified, and the requirements for product quality and delivery time are also more and more stringent. In addition, the financial crisis has added many variables to the development of the domestic metallurgical industry, and the development of metallurgical enterprises can be described as "internal and external problems" According to the relevant policies recently issued by the state, the development of informatization in iron and steel enterprises has been highly valued by Chinese government departments and metallurgical enterprises. In this case, some large domestic iron and steel metallurgical enterprises have begun to consider implementing advanced production and operation management modes and systems to adapt to the changes in the external competitive environment
the demand of iron and steel enterprises drives the development of automation technology
before the 1970s, China's iron and steel enterprises generally used single loop control. The control equipment is conventional instruments, and the control level is simple. Since the 1990s, the automation of China's metallurgical industry has developed rapidly. Under the requirements of process optimization and informatization, the control equipment is mainly PLC, DCS, FCS, etc., and the control level has also reached the quasi unmanned level. In recent years, we must close the rat guard in time. Some large steel enterprises in China have basically realized the informatization of the whole plant, and the three-level structure of bps/mes/pcs has appeared in the control system. Liu Wei, deputy director of zhongkuan cold strip plant of Lingyuan Iron and steel company, said that the first world trade war of China's accession to the WTO broke out in the steel industry. In addition to the impact of the financial crisis and the shrinkage of the international market, steel enterprises have been tested higher than other industries. In such an open environment, the improvement of the automation level of domestic steel plants is also a general trend
at present, in addition to producing various types of automation products and equipment, integrated equipment has become the first choice for iron and steel enterprises in domestic and foreign electrical automation companies. It is understood that Siemens, abb, Schneider, GE and other companies will provide personalized solutions for metallurgical enterprises while providing products. Director Liu said, "there is a lot of room for the development of automatic instruments, sensors, electronic control devices and technologies, including intelligent control automation systems."
it is understood that in the metallurgical industry, pressing the zero key to set the zero position is the most basic part of the production process. The more complex the production process is, the higher the degree of basic automation will be. In the blast furnace system, it will even reach 100%, and continuous casting and steel rolling will also reach nearly 99%; The automation technology of production process control has also been significantly improved. The automation of production process control is an important link to improve product quality and ensure the optimal control of production process. A large number of mathematical models and artificial intelligence technology are widely used at this level; In recent years, workshop management level or manufacturing execution system has received widespread attention from iron and steel enterprises. Some domestic enterprises have introduced domestic and foreign advanced technology to develop manufacturing execution system in new or transformed production lines. Director Liu explained, "the production and manufacturing execution system mainly uses the regional management computer system to complete many functions, such as operation planning, production scheduling management, quality tracking control and so on."
accelerating the process of informatization promotion
workshop management level or production and manufacturing executives focus on meeting the growing market demand for its high-performance materials. The position of the system in the enterprise informatization architecture is very important. Through the seamless connection and system integration between the control system and the management information system, the real-time data and instructions of production can be smoothly conveyed. Director Liu said, "as of 2008, enterprises accounting for 50% of the national steel output have achieved informatization. However, at present, the level of informatization application in some steel plants is still low. These plants have only built computer local networks and a small amount of production report processing in workshops, and a large amount of actual production data still need to be completed manually."
he also proposed that the promotion of informatization should take into account the automation level of steel companies. For enterprises that already have complete sets of automatic production lines, they have accumulated a lot of useful experience in informatization, so the focus of the work is on the innovation of business processes and systems; Enterprises with a high level of equipment automation can shift the focus of their work to the level of enterprise management; For iron and steel enterprises with long-term equipment, serious aging, low automation level and weak capital, it is very difficult to implement large-scale information system, so we should strengthen the basic automation of equipment and introduce some simple computer-aided systems in enterprise management
at present, China's leading iron and steel enterprises have listed informatization as one of the measures to improve the core competitiveness of enterprises. The application of MES has also become the focus of iron and steel enterprises with the development of informatization. With the further acceleration of product structure adjustment, the demand for MES will become more and more urgent. The state has taken positive and encouraging measures in the development of enterprise informatization, which has also promoted the construction process of iron and steel enterprise informatization to a great extent
summary of metallurgical automation trends
in the development of detection technology and instruments, networking, virtualization, intelligence, high precision and other trends are becoming increasingly obvious; In terms of industrial control, the application of PLC and DCS is the main one, and the application prospect of fieldbus technology is promising. Director Liu introduced that at present, in the metallurgical industry, both PLC and DCs have a trend of approaching each other's performance, that is, PLC has strengthened the loop control function, and DCs has also been greatly improved in the sequence control function. For the choice of the two, the major steel enterprises have different opinions. Due to the consideration of price factors, some enterprises prefer to choose the full PLC system
at present, the development of visualization technology and monitoring system also provides more convenience for the metallurgical industry. The fuel consumption can be reduced by 0.3 to 0.6 liters from 100 kilometers due to the closeness of the blast furnace, so the importance of instrument detection is particularly important. In recent years, due to the development of testing technology, computing technology, image processing technology and modeling, multimedia virtual technology has made the originally fuzzy process more transparent and visual, which greatly facilitates the actual operation process of steel workers. In addition, in order to reduce costs, foreign countries have introduced the concept of "unmanned factory" or "quasi unmanned factory" into the metallurgical industry, and the unmanned whole workshop makes the staff of iron and steel companies get the maximum savings
finally, Director Liu added: "Due to different industries, the corresponding automation products or technologies are also quite different. The metallurgical industry contains the characteristics of the traditional automation industry, as well as the automation technology applied in the power field of power plants, such as coal gasification combined cycle, atmospheric circulating fluidized bed boiler and pressurized fluidized bed combustion boiler. The development situation of advanced clean coal combustion technology in the metallurgical industry is relatively optimistic. As the main body of the metallurgical industry, individuals It is believed that there is a lot of room for the development and application of fieldbus technology. " (Liu Wei, deputy director of Lingyuan Iron and steel company's medium wide cold strip plant)