Name: YOLACIR CARLOS DE SOUZA SANTOS
Publication date: 13/06/2023
Examining board:
Name |
Role |
|---|---|
| CARLA CESAR MARTINS CUNHA | Presidente |
| EDNILSON SILVA FELIPE | Examinador Interno |
| GIORGIO FRANCESCO CESARE DE TOMI | Examinador Externo |
Summary: The mining activity constitutes an important industrial sector in Brazil and, like many others,
requires high energy consumption for its operations. However, the disclosure of information in
this sector, regarding energy, is aggregated with that of pelletizing, which impairs the analysis
of the mineral sector in a disaggregated manner. In this sense, the present study, which can be
characterized as applied in nature and, in its objectives, defined as descriptive research; and in
its procedure, as documentary, aimed to analyze the energy performance of the iron mining
sector from 2011 to 2020. Due to the lack of disclosure of disaggregated data, primary
information from the National Mining Agency obtained from the regulated sector was used,
through the declaration of Annual Mining Reports. Thus, from the process of collecting and
processing the individual data of each mining complex, regarding the use of diesel and electric
energy, it was possible to analyze the energy consumption of the iron mining sector, as well as
to estimate it in a disaggregated manner between the mining and beneficiation sectors,
concluding that, in the period covered in the study, there was an increase in energy consumption
(51%) and the identification that the majority of the energy expenditure derives from the use of
diesel oil. By using consolidated energy performance indicators in the mineral sector, it was
verified, over the study period, a tendency of increased energy required for iron ore production
(33% in mining, 39% in beneficiation, and 41% in total), explained by the decrease in grades
and the increase in waste-ore ratio and average transport distance, which necessitates higher
energy consumption in mining and beneficiation. In addition, based on the energy consumption
information, estimates of greenhouse gas emissions from the sector were made for the reported
period, resulting in a 62% increase, justified by the same factors already mentioned.
