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Consulenze e Servizi per l’Ingegneria - Wide Electrical and Mechanical Engineering Service

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CheckUp of Systems

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Electrical Arc Furnaces EAF LF SAF

Check up of the Systems on EAF and LF Furnaces,

 Post SVC System installation

  1. EAF/LF furnace operation

·       Installation of a measurement system for arc furnace analysing and operation reporting

·       Check of typical heat performance in terms of heat profile, power input, current level,

·       refractory balance, electrode consumption and further key factors for melting

·       Setup of circle diagrams and operating tables

 

  1. EAF/LF electrodes regulation

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Check and calibration of current and voltage measurement

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 Check of closed-loop control for electrode regulation system

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 Hydraulic speed tests to analyse valve characteristic, accuracy, wear, mast roller performance.

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 Dip tests to establish high current system data

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 Discussion for improving hydraulic and control system

 

  1. Steelmaking plants Check of electrical protection system

·       Analysing VCB-breaker trips during opening (RC-Filter design with surge arresters)

·       Read-out and check relay settings for EAF-breaker and back-up breakers

·       Analysing necessary protection level for transformer and switchgear, relay settings and coordination

 

  1. EAF/LF Improvements operations

·       Implementation of modified Heat power profiles

·       Testing of new transformer/reactor taps and current levels (impedance set points)

·        for different main melting phases

·       Electrical balancing of furnace operation in order to symmetrise and to lower refractory wear index

  

 

Dr. Alberto Fragiacomo

 ITALY - North-East-Veneto; Winter Local Time: GMT+1

Mob.:  +39 347 2618940 ;  Email: wemes@wemes.it   
Update the: 10 febbraio 2021