Удосконалення системи контролю сталеплавильного виробництва «Майстер»

• Дата: 2025
• Автори: Харченко, О.В., Ковальов, В.Л., Адамович, Н.В.
• Формат: Стаття
• Мова: Українська
• Опубліковано: Physico-technological Institute of Metals and Alloys 2025
• Теми: параметри плавки; прогноз температури металу; система контролю; система; сталь; термодинамічна модель
• Онлайн доступ: https://www.metalsandcasting.com/index.php/mcu/article/view/282
• Назва журналу: Metal and Casting of Ukraine

      In the open-hearth shop of PJSC “Zaporizhstal”, a complex work has been carried out to improve and expand the functional capabilities of the steelmaking control system (SMCS) “Master”, which was originally designed to optimize the deoxidation-alloying of steel at the outlet from the furnace to the ladle and maintain an electronic journal of express analyses of the chemical composition of liquid steel. The following functions were added to the system: a function for controlling the quantity and quality of pig iron supplied to each heat; a module for controlling smelting parameters in real time with an operational forecast of the temperature of the liquid metal and its carbon content, starting from heating and ending with the outlet from the furnace; a module for inertial support of the smelting trajectory in the event of a temporary absence of operational data on the instantaneous oxygen consumption and the position of oxygen lances. A thermodynamic model of a steelmaking bath has been developed, including metal, slag and gas phases, which allows predicting the main melting parameters before the start of actual temperature measurements and express metal analyses, and then correcting the forecast trajectories based on the actual measurements. For each smelting period (warming up, casting of pig iron, melting, finishing, outlet tapping), the following values are displayed: forecast and actual measurements of the metal temperature; forecast and actual measurements of the carbon content in the metal; actual measurements of the manganese, silicon, phosphorus and sulfur content in the metal; instantaneous oxygen and natural gas consumption on the lances; sensor data on the position of the oxygen lances. The limiting zones of instantaneous oxygen consumption are also indicated in accordance with the norms of technological maps. The discreteness of data update can vary and is 30 s by default. A scheme and a thermodynamic model of the interaction of the steelmaking bath with the high-temperature reaction zone around the oxygen jet have been developed. The algorithm of the nonlinear simplex method for solving the problem of optimizing deoxidation-alloying of steel at the outlet from the furnace has been improved. The list of available materials for alloying has been expanded, materials for charging have been added. Monitoring of SMCS “Master” for 44 melts has been carried out. Measures are planned for further improvement of the SMCS “Master” in the direction of integration with the enterprise management system.