Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
A STUDY OF GAS INTERCHANGEABILITY IN HIGH-POWER BURNER USING BY-PRODUCT OF THE STEEL MAKING PROCESS
Submission Author:
Anton Skyrda Verissimo , SP
Co-Authors:
Anton Skyrda Verissimo
Presenter: Anton Skyrda Verissimo
doi://10.26678/ABCM.COBEM2023.COB2023-2125
Abstract
The steel industry produces a considerable amount of waste gases during its production process, such as the gas from the basic oxygen furnace (BOF). These waste gases, if properly utilized, can be a valuable source of energy and help reduce the industry's overall carbon footprint. The use of a burner that utilizes these gases can present some difficulties for the industry. These difficulties can be attributed to the chemical composition of the gas, which is a byproduct of the steelmaking process and is toxic overall due to its high carbon monoxide content. In the present work, we have developed a burner that uses only BOF and air to heat the steel ladle, which can carry 350 tonnes of molten steel. The difficulty in using a burner that uses BOF is its fluctuating composition, which has a great influence on the low heating value (LHV). The chemical composition of BOF can vary depending on several factors, including the quality of the raw materials used in steelmaking and the steelmaking process itself. The fluctuating composition can lead to different combustion characteristics, which can affect the stability and efficiency of the burner. In addition to the aforementioned challenges, conducting operational tests of the burner is also critical, as this type of fuel is not available on the general market. In this study, in addition to developing the burner for use with BOF, a test facility was developed to simulate BOF with LPG and air. The experimental plant consists of mixtures of LPG and air to study the interchangeability of gases by Wobbe index and multiple Weaver indices. Numerical simulations were performed using FLUENT to directly predict the combustion of BOF and simulate BOF. The Reynold stress model was used for the turbulence model and non-premixed combustion with non-adiabatic chemical equilibrium was used for the chemistry. Measurements of temperatures and chemical species were then made and used for comparison with the numerical results. The results show good agreement between the simulation and experimental data. The burner developed here is used to heat steel ladles in a steel mill capable of producing more than 5 million tons of steel per year. This work has a significant impact on steel production, mainly by reducing the consumption of other fuels in the plant, such as natural gas. The result is that the byproduct, which was waste, is used as the main fuel, reducing the carbon footprint.
Keywords
Basic Oxygen Furnace (BOF), High Power Burner, Interchangeability, Wobbe Index, FLUENT ANSYS
