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Analysis on the end point control technology of converter steelmaking
Nowadays, the continuous development of China's social economy has promoted the continuous pace of industrial construction. The demand for steel in various industries is gradually rising, and the requirements for steel quality are becoming more and more strict. In order to better meet the needs of various industries for the quantity and quality of steel, China's steel-making industry is also constantly improving and optimizing the steel-making process, and gradually strengthening the application of converter steelmaking end-point control technology. For the traditional steelmaking process, promoting the application of converter steelmaking end-point control technology can not only effectively improve the operation level, but also help to improve the output efficiency and product quality of enterprises. Relevant enterprises should combine the deficiencies in the current production process, apply the end-point control technology of converter steelmaking more scientifically and reasonably in the production process, realize the upgrading and innovation of operation process, and promote the further development of the iron and steel industry.
1. Application status of end point control technology in converter steelmaking
In the application process of converter steelmaking end-point control technology in China, it mainly goes through four stages: manual control, static control, dynamic control and automatic control. In the application process of each technology, its accuracy and steelmaking quality are constantly improving. In the process of manual control, the staff observes the change of the fire according to the existing experience, and determines the end point with the help of conventional detection methods. Relatively speaking, raw materials are relatively wasteful and the accuracy is low; In the application of static control technology, the static model is mainly used as the basis, the model is constructed according to the composition and temperature of molten steel, and the operation is carried out by calculating the material balance and heat balance, and correcting the model data. The accuracy is improved to a certain extent, but the operation and calculation process are more complex; Dynamic control technology is based on the static model to build a dynamic model, which is mainly used to dynamically monitor the blowing process and adjust parameters in the later stage of steelmaking. Its accuracy is high, up to 80% and above, and is widely used in steelmaking production process; Automatic control technology is based on dynamic control. It controls the smelting process by connecting with the computer. It greatly improves the product quality while reducing the error. In the process of application, it can be adjusted, calculated and transmitted in time through dynamic information acquisition, so as to achieve the goal of blowing.
With the rapid development of science and technology, China has been able to use the corresponding optical parameters (images) to control the end point; In addition, many effective applications of artificial intelligence have also greatly improved the accuracy, especially the neural network control method, which greatly optimized the control accuracy. However, there are still many deficiencies in the application of converter steelmaking end-point control technology in enterprises, which is worthy of further discussion.
2. Analysis on technical problems of end point control in converter steelmaking
2.1 lack of environmental protection awareness of steelmaking staff
At present, due to the insufficient equipment investment in the end-point control technology of converter steelmaking in the iron and steel industry, there is not only a lack of scientific process design, but also a serious loss problem in the iron and steel production process. In addition, the lack of scientific resource comprehensive utilization technology in the iron and steel industry leads to the "three wastes" produced in the production process, which have a bad impact on the natural environment when discharged. In addition, due to the lack of scientific energy-saving methods and perfect insulation system in the production process, the energy consumption is too high to realize environmental protection production.
2.2 lack of scientific equipment for steelmaking
Nowadays, in the end-point control technology operation of converter steelmaking, most of the operations are carried out by operators based on experience. There is no scientific data and indicators as a reference, and there is no professional scientific equipment. In addition, the nature of materials will affect the relevant parameters. At the same time, the complexity of the operation process and the existence of many uncertain factors lead to the quality of steel products not being guaranteed.
2.3 the steel-making production process does not meet the standard requirements
At present, many iron and steel enterprises do not operate in strict accordance with relevant standards in the production process, and there is a lack of perfect supervision mechanism. Even some operators do not have professional literacy and skills. The phenomenon that operators simplify the production process in order to improve production efficiency is widespread, which leads to the quality of iron and steel products not reaching the standard, which will not only affect the construction quality of relevant product use fields, It also seriously affects the sustainable development of iron and steel enterprises.
2.4 low automation level
In most converter steelmaking end-point control technology operations, due to the lack of professional automation equipment support, most operations still need to be completed manually. Many iron and steel enterprises cannot realize automatic production, which seriously affects the improvement of production efficiency; At the same time, some operators do not have professional operation skills, which seriously affects the product quality and leads to the limited development of the enterprise.
3. Improvement strategy of end point control technology in converter steelmaking
3.1 enhance staff's awareness of environmental protection
With the continuous improvement of the environmental protection system, the people's awareness of environmental protection is also gradually enhanced. In this environment, the production of the steel industry also needs to be consistent with the development direction of environmental protection. Therefore, in the future technological exploration, we should increase the investment in various equipment and technologies, optimize the technological process from many aspects, reduce process losses, strengthen the conversion function of energy, excavate recyclable energy, and realize comprehensive energy-saving production. For example, we can try to develop new ways of operation for the residual heat of steelmaking; Effective conversion of flue gas capacity; Recover cooling water; wait. In addition, physical and chemical methods with energy-saving functions can be used to tap possible energy-saving points in the process. Shortening the process time, optimizing the process flow and ensuring the effective connection of all links are the key to realize energy-saving and environmental protection production of converter steelmaking. In the process of steelmaking operation, dust removal technology should be used to reduce the pollution of smoke and dust to the environment, and improve the insulation system to reduce energy consumption as much as possible.
3.2 accelerate technological innovation and equipment upgrading
In order to realize the goal of automation of steel production as soon as possible, we should first strengthen the input and use of scientific equipment. Nowadays, the operation experience and professional level of converter steelmaking staff are the key factors affecting the whole production process and final products. Therefore, increasing innovation, developing more advanced technical equipment, adopting more scientific management methods, and improving various process links are the necessary conditions to ensure the quality of steel. In addition, the staff need to constantly learn in the smelting operation process, improve their professional quality and ability, and adapt to the new requirements of the development of the new era for the steel industry. Relevant enterprises should formulate scientific guiding policies, effectively combine human experience and scientific equipment, so as to improve the accuracy and efficiency of smelting process.
3.3 improve the production standard of steel products
Due to the lack of perfect supervision mechanism in the converter steelmaking process, many steel enterprises' products can not meet the national standard or group standard. However, with the increasing scale of the construction industry and the higher construction requirements, if the steel products fail to meet the due quality standards, the construction quality will be seriously affected. Therefore, the steel industry should cultivate professional operators to produce products in strict accordance with national production standards and the rules and regulations of various steel enterprises, so as to provide guarantee for the normal construction of the construction industry.
3.4 improve automatic control of steelmaking process
The end-point control technology of converter steelmaking realizes assembly automation, and its equipment can be automatically assembled according to the pre-set program. It should be noted that when setting the process of automatic assembly of parts, the quantity and specification should be strictly controlled, and then the correct assembly operation should be carried out through automatic procedures such as cleaning, balancing, connection, etc. In addition, sensing automation helps to effectively supervise the production and operation process. Through the application of automatic control technology, sensors can effectively collect relevant parameter information, monitor the production process with the help of computer system, detect operational risk points in time, identify and deal with them, and then effectively reduce the incidence of waste products.
In short, the application of converter steelmaking end-point control technology in China's steelmaking enterprises can effectively improve the quality and production efficiency of steelmaking products. Therefore, China's steel-making enterprises should conform to the development trend of the times, optimize the production and operation process on the basis of in-depth exploration and analysis of the advantages and disadvantages of the application of various end-point control technologies, and ensure the operation effect and product quality while effectively applying the end-point control technology of converter steelmaking, so as to improve the economic and social benefits of steel-making enterprises and promote their innovative and sustainable development.
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