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Abstract
Since the hot strip mill start up in 2012, the slab reheating furnace was challenged to operate in different conditions, especially the mixed gas composition to heat the slabs. Structural changes in the combustion system, control valves and gas lances of the burners has been made in 2018 to operate with natural gas as dedicated fuel, since the blast furnace of Usiminas Cubatão was shut down in 2015. In ten years of operation, good operational results were achieved like optimization of fuel gas consumption, reduction in primary scale formation and cleaner combustion with low impact of emission of pollutants (NOx, SOx and Dust) according targets of Brazilian environmental standards.
Since the hot strip mill start up in 2012, the slab reheating furnace was challenged to operate in different conditions, especially the mixed gas composition to heat the slabs. Structural changes in the combustion system, control valves and gas lances of the burners has been made in 2018 to operate with natural gas as dedicated fuel, since the blast furnace of Usiminas Cubatão was shut down in 2015. In ten years of operation, good operational results were achieved like optimization of fuel gas consumption, reduction in primary scale formation and cleaner combustion with low impact of emission of pollutants (NOx, SOx and Dust) according targets of Brazilian environmental standards.
Keywords
Slab reheating furnace; Fuel consumption; Pollutants
Slab reheating furnace; Fuel consumption; Pollutants
How to refer
Marconato, Eduardo Amado.
OPERATIONAL IMPROVEMENTS IN THE USIMINAS’S HOT STRIP MILL TO A CLEANER OPERATION
,
p. 156-162.
In: 4th EMECR - International Conference on Energy and Material Efficiency and CO2 Reduction in the Steel Industry 2022,
São Paulo,
2022.
ISSN: -
, DOI 10.5151/5463-5463-35061
