Title

INCREASED PROCESS STABILITY PROMOTED BY REDUCTION ON MOLD LEVEL FLUCTUATION AT TERNIUM BRAZIL

INCREASED PROCESS STABILITY PROMOTED BY REDUCTION ON MOLD LEVEL FLUCTUATION AT TERNIUM BRAZIL

Authorship

Gonçalves, Felipe César Eliziário; Cardoso, Afonso Vaz De Mello; Aranda, Vinicius Cunha; Crivellari, Leandro Silvino; Carvalho, Daniel Augusto Godinho de; Demuner, Leonardo Martins

Gonçalves, Felipe César Eliziário

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Cardoso, Afonso Vaz De Mello

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Aranda, Vinicius Cunha

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Crivellari, Leandro Silvino

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Carvalho, Daniel Augusto Godinho de

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Demuner, Leonardo Martins

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DOI

10.5151/2594-5300-34150

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Abstract

PROCESS STABILITY IS AN ESSENTIAL CIRCUMSTANCE TO DELIVER BETTER QUALITY INDEXES ON THE STEEL SLAB PRODUCED. THEREFORE, SUPPORTING THAT MOLD LEVEL FLUCTUATIONS ARE MINIMIZED IS PARAMOUNT. THE CONTINUOUS CASTING PROCESS IS COMPOSED OF NUMEROUS VARIABLES THAT MUST BE OPTIMIZED AIMING AT HIGHER PRODUCTIVITY AND FEWER OCCURRENCES OF DEFECTS. THE STEEL FLOW CONTROL BETWEEN THE TUNDISH AND THE MOLD AT TERNIUM BRAZIL'S CONTINUOUS CASTING MACHINE IS DONE THROUGH A STOPPER ROD. THE PRESENT WORK COMPARES SCENARIOS BEFORE AND AFTER A PROPOSAL TO INCREASE THE OSCILLATION AMPLITUDE OF THIS EQUIPMENT. TO DEFINE THE MAIN OPERATIONAL VARIABLES THAT INFLUENCED THE STABILITY OF THE MENISCUS, A CORRELATION STUDY WAS ALSO CARRIED OUT. FOR THE STEEL GRADES ANALYZED, THE RESULTS SHOWED SMALLER LEVEL VARIATIONS WHEN IMPLEMENTING THE AMPLITUDE ADJUSTMENT. THE CORRELATION ANALYSIS MADE IT POSSIBLE TO DEFINE CRITICAL PARAMETERS TO BE CONSIDERED IN FUTURE STUDIES.

PROCESS STABILITY IS AN ESSENTIAL CIRCUMSTANCE TO DELIVER BETTER QUALITY INDEXES ON THE STEEL SLAB PRODUCED. THEREFORE, SUPPORTING THAT MOLD LEVEL FLUCTUATIONS ARE MINIMIZED IS PARAMOUNT. THE CONTINUOUS CASTING PROCESS IS COMPOSED OF NUMEROUS VARIABLES THAT MUST BE OPTIMIZED AIMING AT HIGHER PRODUCTIVITY AND FEWER OCCURRENCES OF DEFECTS. THE STEEL FLOW CONTROL BETWEEN THE TUNDISH AND THE MOLD AT TERNIUM BRAZIL'S CONTINUOUS CASTING MACHINE IS DONE THROUGH A STOPPER ROD. THE PRESENT WORK COMPARES SCENARIOS BEFORE AND AFTER A PROPOSAL TO INCREASE THE OSCILLATION AMPLITUDE OF THIS EQUIPMENT. TO DEFINE THE MAIN OPERATIONAL VARIABLES THAT INFLUENCED THE STABILITY OF THE MENISCUS, A CORRELATION STUDY WAS ALSO CARRIED OUT. FOR THE STEEL GRADES ANALYZED, THE RESULTS SHOWED SMALLER LEVEL VARIATIONS WHEN IMPLEMENTING THE AMPLITUDE ADJUSTMENT. THE CORRELATION ANALYSIS MADE IT POSSIBLE TO DEFINE CRITICAL PARAMETERS TO BE CONSIDERED IN FUTURE STUDIES.

Keywords

Steelmaking; Continuous Casting; Slab Quality; Mold Level; Stopper Rod; Oscillation Amplitude

Steelmaking; Continuous Casting; Slab Quality; Mold Level; Stopper Rod Oscillation Amplitude