Title

CALCIUM CARBIDE IN STEELPLANT OPERATIONS

CALCIUM CARBIDE IN STEELPLANT OPERATIONS

Authorship

MAIA, BRENO TOTTI; NASCIMENTO, LEANDRO MIRANDA; MOTTA, LEONARDO SILVA; SOUZA, HELIO GABRIEL DE; SANTOS, RENATA MANGINI; PEREIRA, IVAN RODRIGUES; PEREIRA, IVAN RODRIGUES

MAIA, BRENO TOTTI

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NASCIMENTO, LEANDRO MIRANDA

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MOTTA, LEONARDO SILVA

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SOUZA, HELIO GABRIEL DE

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SANTOS, RENATA MANGINI

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PEREIRA, IVAN RODRIGUES

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PEREIRA, IVAN RODRIGUES

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DOI

10.5151/2594-5300-40894

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Abstract

DURING STEEL PRODUCTION, IT IS NECESSARY TO DEOXIDIZE THE METAL BATH AND THE SLAG IN SECONDARY REFINING, REDUCING THE OXYGEN CONTENT IN THE STEEL TO AROUND 500 PPM, IN ORDER TO ENABLE THE ADDITION OF ALLOYING ELEMENTS AND THE ADJUSTMENT OF THE CHEMICAL COMPOSITION. WHEN THE LIQUID STEEL IS DEOXIDIZED, THE FEO AND MNO FROM THE SLAG THEN BECOMES A MAJOR SOURCE OF OXYGEN AND FOR THIS REASON MUST ALSO BE DEOXIDIZED. THE LITERATURE SHOWS THAT THE PRACTICE OF ADDING CALCIUM CARBIDE (CAC2) DURING CONVERTER CASTING AND IN THE LADLE FURNACE MAKES POSSIBLE THE OPTIMIZATION OF THE STEEL DESULPHURIZATION, WITH AN INCREASE IN THE YIELD OF ALLOYS (FESI, FECR); IMPROVEMENT IN THE QUALITY OF THE TREATED STEEL, WHICH CONTAINS MOSTLY SMALL NON-METALLIC INCLUSIONS, FAVORING LATER STAGES OF CASTING AND COLD ROLLING. OPERATIONAL FACTORS SUCH AS THE COMBINATION OF FROTHY SLAG AND HOMOGENIZATION OF THE LADLE FURNACE RUN ALSO REDUCE THE %FEO AND %MNO IN THE STEEL LADLE SLAG, AS WELL AS REDUCING REOXIDATION, WITH A REDUCTION IN THE LEVEL OF MNS-TYPE INCLUSIONS FOR THESE STEELS, DUE TO THE REDUCTION IN THE FINAL SULPHUR CONTENT

DURING STEEL PRODUCTION, IT IS NECESSARY TO DEOXIDIZE THE METAL BATH AND THE SLAG IN SECONDARY REFINING, REDUCING THE OXYGEN CONTENT IN THE STEEL TO AROUND 500 PPM, IN ORDER TO ENABLE THE ADDITION OF ALLOYING ELEMENTS AND THE ADJUSTMENT OF THE CHEMICAL COMPOSITION. WHEN THE LIQUID STEEL IS DEOXIDIZED, THE FEO AND MNO FROM THE SLAG THEN BECOMES A MAJOR SOURCE OF OXYGEN AND FOR THIS REASON MUST ALSO BE DEOXIDIZED. THE LITERATURE SHOWS THAT THE PRACTICE OF ADDING CALCIUM CARBIDE (CAC2) DURING CONVERTER CASTING AND IN THE LADLE FURNACE MAKES POSSIBLE THE OPTIMIZATION OF THE STEEL DESULPHURIZATION, WITH AN INCREASE IN THE YIELD OF ALLOYS (FESI, FECR); IMPROVEMENT IN THE QUALITY OF THE TREATED STEEL, WHICH CONTAINS MOSTLY SMALL NON-METALLIC INCLUSIONS, FAVORING LATER STAGES OF CASTING AND COLD ROLLING. OPERATIONAL FACTORS SUCH AS THE COMBINATION OF FROTHY SLAG AND HOMOGENIZATION OF THE LADLE FURNACE RUN ALSO REDUCE THE %FEO AND %MNO IN THE STEEL LADLE SLAG, AS WELL AS REDUCING REOXIDATION, WITH A REDUCTION IN THE LEVEL OF MNS-TYPE INCLUSIONS FOR THESE STEELS, DUE TO THE REDUCTION IN THE FINAL SULPHUR CONTENT

Keywords

CALCIUM CARBIDE; STEEL OPERATIONS; CLEAN STEEL.

Calcium Carbide; Steel Operations; Intrinsic Quality; Industry 4.0.