Continuous temperature control of liquid steel in technological units of metallurgical production

The article considers the method of continuous objective control of the temperature of liquid steel in metallurgical aggregates of steelmaking and foundry industries. The method is characterized by a sufficiently high accuracy (±9 °С), simple operation, reliability and service life, exceeding the service life of the refractory masonry of the process unit. The aim of the work is to develop a method for the continuous monitoring of the temperature of liquid steel in technological units of metallurgical production. The basis of the adapted method is the solution of the inverse heat conduction problem (usually incorrect), when, at known temperatures, temperatures on the layers of active thickness of refractory masonry (up to 80 mm) restore the temperature at the “melt - refractory masonry” boundary. The new methodological approach to the elements of novelty in the work is the continuous objective control of the temperature of liquid steel in metallurgical aggregates. The results of the justification and the technical solution, the results of the study of the accuracy of the method on the experimental bench and in real production conditions on the arc steel furnace are presented. The obtained experimental data reflect the sufficiently high accuracy and efficiency of the considered calculation method of continuous monitoring of the temperature of liquid melt. This task is relevant in the conditions of using of steel-furnace aggregates as efficient installations for obtaining the melt heated to a certain temperature. It is advisable to use the method in installations of out-of-furnace finishing of steel “furnace - ladle”. The calculation method is designed for software implementation using domestic low-cost microprocessor controllers both as an autonomous information technical control means and as part of an integrated element in the process automation system of steelmaking.