Title

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%)

Authorship

Polanco, Fernando Hernández; Figueroa, Mercedita Nejarda

Polanco, Fernando Hernández

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Figueroa, Mercedita Nejarda

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DOI

10.5151/2594-5300-22741

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Abstract

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.

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.

Keywords

Ferronickel; Desulfurization; Ladle furnace; Ferroalloys.

Ferronickel; Desulfurization; Ladle furnace; Ferroalloys.