ISSN 2594-5300
53º Seminário de Aciaria, Fundição e Metalurgia de Não-Ferrosos — vol. 53, num.53 (2024)
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Abstract
OVER THE YEARS, REBONDED MAGNESIA-CHROMITE BRICKS HAVE BEEN EXTENSIVELY UTILIZED IN CRITICAL REGIONS OF RH DEGASSERS. HOWEVER, WITH THE EVOLUTION OF STEELMAKING PROCESSES REQUIRING HIGHER-GRADE STEEL PRODUCTIONS, ARISES A NEED TO ENHANCE THESE MATERIALS TO ACHIEVE THE NEW DEMANDS PLACED ON REFRACTORY DURING APPLICATIONS. THE OBJECTIVE OF THIS STUDY WAS TO IDENTIFY THE PRIMARY FACTORS CONTRIBUTING TO THE CURRENT SITUATION AND CREATE EFFECTIVE SOLUTIONS TO ADDRESS THESE CHALLENGES. THIS PAPER PROVIDES AN OVERVIEW OF THE STEPS TAKEN TO IDENTIFY THE MAIN ISSUES, ALONG WITH THE METHODOLOGIES EMPLOYED TO THOROUGHLY UNDERSTAND ALL VARIABLES. THIS STUDY DELVED INTO THE CHALLENGING PERFORMANCE SCENARIO ENCOUNTERED IN THE RH DEGASSER AT GERDAU OURO BRANCO, UTILIZING MAGNESIA-CHROMITE BRICKS FROM RHI MAGNESITA. PRIOR TO IMPLEMENTING ANY ALTERATIONS TO THE REFRACTORY, A THOROUGH AND EXTENSIVE UNDERSTANDING OF THE CASE WAS PURSUED, AIMING TO DETERMINE THE PRIMARY CAUSES AND PROPOSE TECHNICAL SOLUTIONS ALIGNED WITH GOB'S OBJECTIVES. A NOVEL TECHNOLOGY FOR MEASURING WEAR RATE WAS DEVELOPED, PROVIDING INSIGHTS THROUGH ITS INNOVATIVE MEASUREMENT CONCEPT. IN-DEPTH THERMOMECHANICAL SIMULATION STUDIES WERE CONDUCTED, LEADING TO A COMPREHENSIVE UNDERSTANDING OF THE PRIMARY MECHANISMS EXPERIENCED BY THE REFRACTORY. FOLLOWING ADJUSTMENTS TO THE REFRACTORY CONCEPT BASED ON THESE FINDINGS, A SUCCESSFUL TURNAROUND IN THE RH DEGASSER WAS SUCCEEDED, WITH THROATS ACHIEVING A POTENTIAL OF 350 HEATS.
OVER THE YEARS, REBONDED MAGNESIA-CHROMITE BRICKS HAVE BEEN EXTENSIVELY UTILIZED IN CRITICAL REGIONS OF RH DEGASSERS. HOWEVER, WITH THE EVOLUTION OF STEELMAKING PROCESSES REQUIRING HIGHER-GRADE STEEL PRODUCTIONS, ARISES A NEED TO ENHANCE THESE MATERIALS TO ACHIEVE THE NEW DEMANDS PLACED ON REFRACTORY DURING APPLICATIONS. THE OBJECTIVE OF THIS STUDY WAS TO IDENTIFY THE PRIMARY FACTORS CONTRIBUTING TO THE CURRENT SITUATION AND CREATE EFFECTIVE SOLUTIONS TO ADDRESS THESE CHALLENGES. THIS PAPER PROVIDES AN OVERVIEW OF THE STEPS TAKEN TO IDENTIFY THE MAIN ISSUES, ALONG WITH THE METHODOLOGIES EMPLOYED TO THOROUGHLY UNDERSTAND ALL VARIABLES. THIS STUDY DELVED INTO THE CHALLENGING PERFORMANCE SCENARIO ENCOUNTERED IN THE RH DEGASSER AT GERDAU OURO BRANCO, UTILIZING MAGNESIA-CHROMITE BRICKS FROM RHI MAGNESITA. PRIOR TO IMPLEMENTING ANY ALTERATIONS TO THE REFRACTORY, A THOROUGH AND EXTENSIVE UNDERSTANDING OF THE CASE WAS PURSUED, AIMING TO DETERMINE THE PRIMARY CAUSES AND PROPOSE TECHNICAL SOLUTIONS ALIGNED WITH GOB'S OBJECTIVES. A NOVEL TECHNOLOGY FOR MEASURING WEAR RATE WAS DEVELOPED, PROVIDING INSIGHTS THROUGH ITS INNOVATIVE MEASUREMENT CONCEPT. IN-DEPTH THERMOMECHANICAL SIMULATION STUDIES WERE CONDUCTED, LEADING TO A COMPREHENSIVE UNDERSTANDING OF THE PRIMARY MECHANISMS EXPERIENCED BY THE REFRACTORY. FOLLOWING ADJUSTMENTS TO THE REFRACTORY CONCEPT BASED ON THESE FINDINGS, A SUCCESSFUL TURNAROUND IN THE RH DEGASSER WAS SUCCEEDED, WITH THROATS ACHIEVING A POTENTIAL OF 350 HEATS.
Keywords
RH Degasser; Throats; 3D laser scan; Simulation
RH Degasser; Throats; 3D laser scan; Simulation.
How to refer
SOUZA, WAGNER JESUS;
COELHO, TITO HUGO NOGUEIRA;
SARDELLI, JOSE ALVARO PREVIATO;
SARDELLI, JOSE ALVARO PREVIATO;
SOARES, SERGIO EUSTAQUIO;
ALMEIDA, ERIC NOVAES DE;
DOMINGOS, PEDRO MOURÃO;
GUIMARÃES, BRUNO FILIPE.
INNOVATIVE SOLUTIONS FOR IMPROVED PERFORMANCE IN RH DEGASSERS – A TURNAROUND CASE
,
p. 843-850.
In: 53º Seminário de Aciaria, Fundição e Metalurgia de Não-Ferrosos,
São Paulo, Brasil,
2024.
ISSN: 2594-5300
, DOI 10.5151/2594-5300-41429
