Abstract:
The objective of this project is to reduce CO2 emissions and energy consumption through hot charging, improving coordinated/synchronized between continuous casting and hot strip mill (LTQ), at the line sequencing level, seeking to increase the productivity of the Hot Strip Mill at ArcelorMittal Tubarão, in line with the drivers to increase production at the Hot Strip Mill, by changing the sequencing process of the Hot Strip Mill with optimization of the slab reallocation process (reduction of time and movements in the LTQ yard) during and after the formation of the sequência/Line-up of lamination with a focus on the temperature of slabs reheating furnaces. The work began with a review of metallurgical rules for reallocating materials, mapping processes (As Is), reviewing the objective function and constraints of the mathematical model for optimizing LTQ sequencing, opportunistic evaluation using Virtual Slabs( slabs still not produced, but already planned to be casted). With implementation of the process/system it is expected to achieve a potential increase in temperature slabs reheating furnaces, a 10% reduction in CO2 emissions, Increased process/system reaction intelligence, greater synchronism with Steelmaking, a reduction the risk of material breaking during reheating (important for new generation AHSS steels, in addition to the increase in annual production the Hot Strip Mill at ArcelorMittal Tubarão