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Analysis of the Effect of the Excess Air Combustion Ratio on the Loss of Steel and Scale Adhesion in the Process of Heating the Steel Charge Including Changes in Technology

Wyleciał Tomasz, Boryca Jarosław, Urbaniak Dariusz

Archives of Metallurgy and Materials

2023

Vol. 68, iss. 3

1025--1028

Both the steel loss to scale and the scale adhesion are very important parameters of the heating process. High values of steel loss (large thickness of the scale layer) reduce the heat exchange intensity in the furnace chamber, which results in higher energy consumption. A low adhesion value adversely affects the operation of heating furnaces, while too high value causes the scale to roll into a steel product and deteriorate its purity and quality. The paper presents the research methodology and the results of measurements of steel loss and scale adhesion. The effect of the excess air combustion ratio values on loss of steel and scale adhesion for constant furnace efficiency is discussed. This influence was described by mathematical dependencies. The tests were carried out for traditional technology and rational technology, enabling the reduction of steel losses to scale and energy consumption.

Influence of Initial Charge Temperature and Furnace Exploitation on Steel Loss

Boryca Jarosław, Wyleciał Tomasz, Urbaniak Dariusz

Archives of Metallurgy and Materials

2022

Vol. 67, iss. 1

289--291

Steel loss related to the formation of scale is a parameter that is of great importance in the charge heating process. The value of steel loss determined by the thickness of the scale layer affects the intensity of the heat transfer process in the heating furnace, but also constitutes a significant element in the heat-material balance. Reducing the loss of steel during charge heating has a positive effect on heat consumption and material losses, which is extremely important in the context of energy and resource savings, the main elements of sustainable development processes. The methodology of determining the loss of steel to scale in an industrial heating furnace is presented in the paper. The results of calculations for various charge temperatures at the entrance to the furnace are presented. The influence of furnace operating conditions on steel loss is discussed.