Energy

In 2022, total energy consumption within CSN Group companies was 114.8 million GJ, an increase of 2% compared to the previous year, as a result of the consolidation of the reporting of activities at the Alhandra unit (Cement). In line with its ESG strategy, the Company has been investing more and more in new energy sources for self-production and expansion of renewable sources in the energy matrix of all businesses, with a focus on reducing direct and indirect emissions.

Electricity consumption is guaranteed through CSN’s own assets and energy contracts (PPAs). In 2023, CSN reached 100% of the electricity consumed coming from renewable sources and self-generation, such as hydroelectricity.

CSN’s assets in energy are: the Itá Hydroelectric Plant (SC), the Igarapava Hydroelectric Plant (MG), the Thermoelectric Plant, which reuses gases from the steelmaking process, and the TRT (Top Recovery Turbine), which operate together at the UPV (Presidente Vargas Mill). TRT makes use of the kinetic energy existing in the gases generated in blast furnace 3, a process that enables self-generation of energy and contributes to the reduction of our environmental impacts, since this kinetic energy operates via gas pressure.

Also, in 2022, CSN completed important acquisitions: the Quebra-Queixo Hydroelectric Plant, with an average installed capacity of 120MW; the Cachoeira dos Macacos Small Hydroelectric Plant, with an installed capacity of 3.4 MW; the Cachoeira dos Macacos Small Hydroelectric Plant, with an installed capacity of 3.4 MW; the Santa Ana Energética S.A., with 6.5MW of installed capacity; Topazio Energética S.A., holder of the concession for the exploitation of the Small Hydroelectric Plant Sacre II with 30 MW of installed capacity; and 98.96% of the shares of the State Electric Power Generation Company (CEEE-G) with 1.2 thousand MW of installed capacity. These businesses are intended to support and strengthen the business expansion strategy of CSN and its subsidiaries, in addition to offering self-sufficiency in 100% renewable energy to the Group’s entire operation

Energy intensity

	2020	2021	2022
Energy consumption (GJ) divided by the added value distributed (R$ thousand)	8,30	4,16	6,97
Energy consumption (GJ) divided by ton of crude steel	20,88	20,70	21,94
Energy consumption (kWh) divided by ton of cement	85,96	81,12	70,38
Energy consumption (kWh) divided by ton of cementitious	85,40	80,50	74,40
Energy consumption (MJ) divided by ton of clinker	3269,00	3287,00	3315,00
Energy consumption (GJ) divided by ton of ore produced	0,66	0,14	0,16

100%

of energy at CSN comes from renewable sources, since 2023.

13%

of reduction in energy consumption divided by cement production in relation to 2021: 81.12kWh/t (2021) x 70.38 kWh/t (2022)

100%

of electricity consumption guaranteed through CSN's own assets and energy contracts (PPAs)