Per: OSCAR ROSA MARQUES (REFRAMAX ENGENHARIA), RAFAEL AURELIO BURATTI (REFRAMAX ENGENHARIA), DECIO LUIZ E SILVA TEIXEIRA (REFRAMAX ENGENHARIA), LEANDRO ALVES DO COUTO CORREA (REFRAMAX ENGENHARIA)
Abstract:
The ArcelorMittal Pecém Blast Furnace St oves System consisted of 03 state-of-the-art internal combustion St oves, a hot air line Blast Main connecting the St oves to the Blast Furnace, and equipment such as tuyeres and a heat recovery system to increase BFG (Blast Furnace Gas) and combustion air temperature. It had 3 St oves, HBS#1 to HBS#3, which operated as follows: one (01) St oves in operation, blowing and two (02) St oves in heating. It is necessary that there are always 02 St oves heating, so that there is no loss of production. Therefore, in order to carry out cold repairs on St oves #1 and #3, St oves #4 had to be installed. In parallel with the construction of St oves #4, the ArcelorMittal Pecém engineering team, together with Reframax, prepared a study, with the objective of stabilizing the hot blast main, replacing and stabilizing the branches of HBS#1, HBS#2 and HBS#3, together with the interconnection of HBS#4, with the design of the met allic tie rodding project for the hot blast main branches and repair of the “T” joint, in 198 hours, a challenging time, not know n in ot her internatuonal references.