Marie-Pierrette Gros Bertolus, FR393818A

Mode de traitement des scories acides et des minerais de fer silicieux, en vue de leur utilisation à la fabrication du ferro-silicium dans le four électrique.

On January 7, 1909, Marie-Pierrette Gros Bertolus was granted a French patent for a method of producing ferro-silicon using acidic slags and siliceous iron ores in an electric furnace. Her process recycled industrial by-products by turning them into agglomerates with reducing agents and additives, improving efficiency while reducing impurities such as phosphorus.

Date of Application: 9 November 1908

Date of Issuance: 7 January 1909

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• Espacenet