RECENT PROJECTS The new control system layout for EAF 1 atVotorantim Siderúrgia tilting and roof removal mechanism The existing Rockwell SLC 500 PLC contained the logic responsible for controlling and monitoring the furnace instrumentation: temperatures for inlet water for the shell and roof, chilled panels and furnace floor; pressure switches for chilled arms, structure, wall plate, moving elbow and burners; pressure transducers for inlet and outlet water for housing and EAF roof. This PLC also interfaced with the SIA melt shop system, which interfaced with the burners PLC and dedusting PLC. As stated previously, the revamp simplified the existing control configuration to one single platform. Russula supplied a new MCC, responsible for the medium tension electrical distribution to: the PLC panel +K2, remote panel +K1, central control desk +P1, panel of hydraulic changes (existing), panel AMI-GE PLC (existing), graphite machine (existing), transformer and switch oil pumps (existing), pressing machine tubes (existing), main circuit breaker Joslyn (existing), panel of oxygen robot MOX (existing), panel of temperature robot and rotating robot (existing) and blow torcher´s panel; Motors 1 and 2 for water pumps driven by Sirius Soft Starter, drain pump, recirculation pumps 1 and 2, electrode fixing pump, air compressor, oil pressure pump of regulator tank and retractable platform motor via Simocode C; EBT (Eccentric Bottom Tapping) ladle car drive motors 1 and 2, graphite machine motor and furnace disconnect, via Sinamics PM240; power meter of 23kV input network through a Siemens PAC4200 multimeter. Russula provided a Siemens S7-400 PLC and a remote ET-200M to control the furnace components, instrumentation and the discrete interface with existing subsystems. In addition Russula supplied a new cover for the main control desk, a new casting desk and a new hydraulic control desk. All the existing cables were replaced with new cables, existing cable trays were relocated and new trays provided when necessary. The Wonderware Intouch HMI screeens made navigation and viewing easy through the use of two 21" monitors. Operators can now view the fusion states, movements, cooling, hydraulics, power meters, trends, alarms and events. Russula also provided an IBA data acquisition system to assist operations and maintenance for registering the relevant data to the furnace in real time. 21 Russula Newsletter <strong>No</strong>. <strong>11</strong> April 2015 - Copyright © by <strong>RUSSULA</strong> S.A. S.A.
RECENT PROJECTS Votorantim successfully commissioned EAF in the beginning of 2015 EAF supervision HMI screenshot (top) and HMI screenshot of furnace movements (below) Russula Newsletter <strong>No</strong>. <strong>11</strong> April 2015 - Copyright © by <strong>RUSSULA</strong> S.A. 22
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