Method for the production of a foamed slag in a metal bath

Details Method for the production of a foamed slag in a metal bath Method for the production of a foamed slag in a metal bath

C - Chemistry, Metallurgy

21

C

C21C 5/52 (2006.01)

Patent

CA 2637850

The invention relates to a method for producing a foamed slag (1) on a metal bath (2) in a metallurgical furnace (3). According to said method, a mixture (4) containing at least one metal oxide and carbon is introduced into the furnace (3), the metal oxide is reduced by means of the carbon below the slag (1) that is located there, and the gases produced during the reduction process form bubbles such that the slag is foamed. In order to optimize the formation of foamed slag, the mixture (4) is delivered into the furnace (3) in such a way that a desired height (h) or a desired section of the height (h) of the layer of foamed slag (1) is generated or maintained.

L'invention concerne un procédé de fabrication d'un laitier expansé (1) sur une matière fondue métallique (2) dans un four (3) de métallurgie. Selon ce procédé, un mélange (4) contenant au moins un oxyde métallique et du carbone est introduit dans le four (3). Sous le laitier (1) qui se trouve dans le four, l'oxyde métallique est réduit par le carbone et les gaz produits lors de cette réduction forment dans le laitier des bulles qui provoquent l'expansion du laitier. Pour fabriquer un laitier expansé de manière optimale, un mélange (4) est ajouté dans le four (3) de manière à créer ou à maintenir une hauteur (h) souhaitée ou une zone de hauteur (h) souhaitée de la couche de laitier expansé (1).

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