The Hot Rolling Operation Department of Rungang Co., Ltd. implemented the deployment of the “two sessions” at the two levels of the group and the company, and went all out to promote extremely low-cost operation, carefully controlled consumption and expenses, and explored the space for cost reduction, and explored the “3+2″ production mode of heating furnaces. , that is, two-line alternate double-furnace production of hot rolling, and the “3+3″ mode is restored in stages, aiming at the ultimate efficiency and the pursuit of extremely low cost. Compared with the “3+3″ production mode, the fuel consumption is reduced by about 4.1%, the daily cost of natural gas outsourcing is reduced by 128,000 yuan, the average daily cost of electricity purchased is about 85,500 yuan, and the cost reduction is about 213,500 yuan per day.
Reducing costs without reducing efficiency, and laying a solid foundation for bottleneck research. Under the guidance of the party committee of the operation department, the production technology room took the lead in sorting out the “neck” problem of the heating furnace process, and cooperated with the manufacturing department and the technology center to carry out project research. By formulating the corresponding relationship between the slab transfer time and the temperature of entering the furnace, the rules for mixing hot and cold are clarified, and at the same time, the rules for mixing high and low temperature are formulated to promote batch scheduling, and promote the 2160 production line to reduce the ratio of hot and cold mixing by 33%. %. By carrying out work such as merging and optimizing the tapping temperature and optimizing the material thickness of the limit specifications of IF steel and BH steel, a solid foundation has been laid for the further promotion of low-temperature rolling technology. level. Through effective measures such as optimizing the classification of various steel grades and the necessary furnace temperature setting parameters, and developing the temperature control linkage function between heating sections, the optimization of the automatic steel burning model has been realized, and the proportion of 2160 automatic steel burning has increased by 51% year-on-year. With the successive overcoming of a number of “stuck neck” problems, the heating efficiency has been greatly improved, laying a good foundation for the exploration of the new “3+2″ production mode.
The reduction of furnaces does not reduce production, and efforts are made to improve the efficiency of the production line. The hot rolling operation department actively pressurized, and coordinated the deployment of the “3+2″ production organization of two hot rolling line heating furnaces. Strengthen process coordination, build a real-time linkage mechanism with the steelmaking operation department and the manufacturing department, comprehensively consider multiple factors such as billet balance, variety structure, order fulfillment, raw material supply in the next process, and capital occupation at the end of the month, scientific production scheduling, seamless connection, and comprehensive promotion The production organization mode of two-line alternate and two-furnace promotes both fuel consumption and carbon emission reduction. The two hot rolling lines comprehensively sort out the key points of high-efficiency rolling, accurately exert force, and continuously improve, so as to ensure that the output does not decrease and the efficiency does not decline.
The 1580 production line continuously strengthens the production scheduling organization, continuously optimizes the process technology, and strives to improve the production efficiency of the double furnace. Combined with the characteristics of the rolling products of the production line and the material plan for the next process, the two main products of pickling plate and silicon steel are classified and scheduled for centralized production, and the advantages of high hot charging rate, centralized specifications and large batches of silicon steel are fully utilized to develop a dual-furnace production mode. . The production line takes the whole-process thermal management project of the joint-stock company as the starting point, sorts out and optimizes the use rules of slab insulation equipment, and compiles the “Promotion Management Requirements for Special Pits for Pickled Boards”, and further optimizes the production schedule of “left behind blanks” for pickled boards. Regulations, strengthen the management of thermal insulation pits, pay close attention to the schedule of steelmaking and the status of thermal insulation pits, comprehensively improve the heat transfer rate of hot charging, and further reduce fuel consumption. Actively carry out the first-class benchmarking and production line benchmarking series of work, through continuous optimization of the roll change sequence and refinement of management measures, the average roll change time in April was reduced by 15 seconds from the previous month. The fastest roll change time broke 8 into 7, and the average roll change time moved forward to 9 minutes. The production line maintains a good trend of high efficiency and low consumption.
The furnace will not stop working, and the furnace service will be repaired at the right time. Since April 16, the 1580 production line has started double furnace production. When the new crown pneumonia epidemic hit, the factory area was closed and managed. The majority of cadres and workers stayed at home and took care of everyone. The “epidemic” did not hesitate to live in the factory to ensure production, with strong execution Efforts to implement the decisions of the party committee. During this period, the operation department made full use of the opportunity of shutdown to arrange annual inspection and furnace service. In 23 days, the furnaces of three heating furnaces were successfully completed, 408 tons of slag were cleaned, 116 tons of refractory materials were replaced and repaired, 110 valves were replaced and repaired, 78 ignition pipes were dredged, and the elevation of pads was measured more than 1,400 times. A total of 82 maintenance tasks have been completed, and the three heating furnaces have been started and stopped 7 times. This furnace operation shared the pressure for the series of annual repairs, and accumulated sufficient strength for the next high-efficiency and low-consumption production.
In the next step, the hot rolling operation department will continue to focus on high production and low consumption, continue to tap the potential to reduce costs, and fully pursue extremely low-cost operation.
Post time: May-23-2022