Wyniki wyszukiwania - BazTech

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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

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2023

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Vol. 68, iss. 3

1025--1028

EN

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.

2

Influence of Initial Charge Temperature and Furnace Exploitation on Steel Loss

Boryca Jarosław, Wyleciał Tomasz, Urbaniak Dariusz

Archives of Metallurgy and Materials

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2022

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Vol. 67, iss. 1

289--291

EN

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.

3

Research of the Impact of the Heating Rate on Adhesion of Scale Arising in the Process of Heating of the Steel Charge Before the Plastic Reworking

Boryca Jarosław, Kolmasiak Cezary, Wyleciał Tomasz, Urbaniak Dariusz, Kizek Jan

New Trends in Production Engineering

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2019

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Vol. 2, Iss. 2

301-311

EN

Before steel materials are subjected to an appropriate heat treatment, they must be preheated. During this process scale is formed, which can be a problem in the proper heat treatment of the steel charge. The preheating process of the steel charge is carried out under specific conditions – parameters. These conditions determine certain properties of scale. One of the most important issues in this context, important from the point of view of the potential removal of scale from the charge surface, is the correlation of the heating process temperature and the adherence of the scale to the steel substrate. The paper presents the results of such research and their discussion. In addition, the methodology for measuring the scale adhesion to steel substrate is presented. Mathematical relations endearing impact of heating rate on the scale adhesion have been developed.

4

Correlation between heat consumption and steel loss for scale in the two-stage heating process

Kieloch M., Piechowicz Ł., Boryca J.

Archives of Metallurgy and Materials

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2007

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Vol. 52, iss. 4

655-663

EN

On the basis of the authors’ own investigation and computations a correlation between the consumption of heat and the loss of steel for scale in a two-stage heating process has been established. The results of numerical computation of heat consumption and steel loss for scale, as performed based on the mathematical model for the pusher furnace, are given. The results of both numerical computation and laboratory tests were subjected to mathematical interpretation. It has been found that the dependence of heat consumption on steel loss can be described with simple equations.

PL

Na podstawie wyników własnych badań i obliczeń ustalono współzależność zużycia ciepła i straty stali na zgorzelinę w dwuetapowym procesie nagrzewania. Zaprezentowano wyniki obliczeń numerycznych zużycia ciepła i straty stali na podstawie modelu matematycznego pieca przelotowego. Zarówno wyniki obliczeń numerycznych jak i badań laboratoryjnych zostały poddane interpretacji matematycznego. Ustalono, że zależność zużycia ciepła od straty można opisać prostymi równaniami.

5

Modelowanie utleniania stali w dwuetapowym procesie nagrzewania

Kieloch M., Boryca J., Piechowicz Ł.

Hutnik, Wiadomości Hutnicze

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2006

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Vol. 73, nr 2

60-64

PL

W pracy, na podstawie wyprowadzeń teoretycznych, opracowano model matematyczny dwuetapowego procesu nagrzewania wsadu stalowego. Model umożliwia wyprowadzenie prostych zależności, z wykorzystaniem których można dokładnie obliczać stratę stali w procesie nagrzewania. W celu weryfikacji opracowanegp mpdelu przeprowadzono obliczenia numeryczne i badania laboratoryjne. Otrzymane wyniki są porównywalne, a średni błąd przekracza 4 %.

EN

In the work, on the basis theoretical derivation of simple dependences which utilization makes possible to calculate the loss of steel in the heating process. For verification of the formulated model numerical calculations and laboratory tests have been carried out. The obtained results are comparable and the average error does not exceed 4 %.