Per: Douglas Vinícius Ferreira de Castro (Aperam South America), Jacqueline de Oliveira Cota (APERAM SOUTH AMERICA), Luciano Milagres da Silva (APERAM SOUTH AMERICA), Maria Aparecida de Lana Santos (APERAM SOUTH AMERICA), Matheus Augusto Santos Vieira (APERAM SOUTH AMERICA), Péricles Guimarães Oliveira Aguiar (APERAM SOUTH AMERICA), Peterson Ribeiro Francisco (APERAM SOUTH AMERICA), Raphael Felippe Miranda de Oliveira (APERAM SOUTH AMERICA)
Abstract:
Quality is one of most important indicator for Aperam. However, due to the challenges in each process, keep quality control always represent a challenge. In Aperam Timóteo Blast Furnances, hot metal quality means silicon e and temperature. Knowing that quality affects our process, we commited to increase the hot metal qualit using lean metodology. The silicon and temperature stability of hot metal brings benefits to the the blast funace and meltshop processes. Guided by the limits of hot metal specification and kwowing the silicon content has a positive and linear correlation with temperature, we know that would be necesary reduce the thermal variations to increase our quality. According to our methodology, we defined that the goal would be increase blast furnance 1 compliance from 78,20% to 81,08% and blast furnace 2 from 74,96% to 81,68%. The proposed targets were exceeded in both blast furnace with results equal to 92,80% in blat furnace 1 and 84,56% in blast furnace 2, breaking historial records. The increased silicon on target reduce its avarege from 0,657% to 0,601% that reduce limes in meltshop.