LADLE FURNACE SECONDARY METALLURGICAL PROCESS. DESULPHURIZATION OF FERRONICKEL, HIGH  SULFUR CONTENT (0,5% a 1,0%): LADLE FURNACE SECONDARY METALLURGICAL PROCESS. DESULPHURIZATION OF FERRONICKEL, HIGH  SULFUR CONTENT (0,5% a 1,0%)

Polanco, Fernando Hernández; Figueroa, Mercedita Nejarda

doi:10.5151/2594-5300-22741

Anais do Seminário de Aciaria, Fundição e Metalurgia de Não-ferrosos

ISSN 2594-5300

44º Seminário de Aciaria — vol. 44, num.44 (2013)

Título

LADLE FURNACE SECONDARY METALLURGICAL PROCESS. DESULPHURIZATION OF FERRONICKEL, HIGH SULFUR CONTENT (0,5% a 1,0%)

Autoria

Polanco, Fernando Hernández; Figueroa, Mercedita Nejarda

10.5151/2594-5300-22741

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Resumo

Increasing demand on stainless steel series 300 from world ́s industries has motivated to former ferronickel producers to optimize their plants and attract new investors to participate in the market. Crude ferronickel from lateritic ore, reduced in electrical furnaces, contains high sulfur levels that can be removed with secondary metallurgical processes. The oxidation process takes place in a ladle (silicon, carbon and phosphorus) with a blowing station. The desulphurization and final chemical composition adjustment and heating for the final casting (ingots or granules), is performed in a ladle furnace station. This proven technology has direct influence on the unitary cost of the ferronickel production, when used efficiently. This paper describes the crude ferronickel refining stages with high sulfur content (0.2%-0.8%), with less cycling time and reducing operative costs using FeSi.

Palavras-chave

Ferronickel; Desulfurization; Ladle furnace; Ferroalloys.

Como citar

Polanco, Fernando Hernández; Figueroa, Mercedita Nejarda. LADLE FURNACE SECONDARY METALLURGICAL PROCESS. DESULPHURIZATION OF FERRONICKEL, HIGH SULFUR CONTENT (0,5% a 1,0%) , p. 37-45. In: 44º Seminário de Aciaria, São Paulo, 2013.
ISSN: 2594-5300 , DOI 10.5151/2594-5300-22741