Process for preparing a foaming slag former, product and use...

Details Process for preparing a foaming slag former, product and use... Process for preparing a foaming slag former, product and use...

C - Chemistry, Metallurgy

21

B

C21B 3/04 (2006.01) C21C 5/54 (2006.01) C21C 7/076 (2006.01) C22B 7/04 (2006.01)

Patent

CA 2712064

The present invention relates to a process for preparing a foaming slag former 40 for electric are furnaces 1, with at least 20 wt. % of solid slag particles, to the product of this process, and to its use in electric arc furnaces 1. The process of the invention comprises the steps of aggregating solid slag particles into a coarser granular material 33 and carbonating them to produce said slag former 40. In a preferred embodiment, said solid slag particles are aggregated before said carbonation, so that the carbonates form a solid matrix binding the particles together.

La présente invention porte sur un procédé de préparation d'un fondant de scorification moussant 40 pour des fours électriques à arc 1, avec au moins 20 % en poids de particules de scories solides, sur le produit obtenu par ce procédé et sur son utilisation dans des fours électriques à arc 1. Le procédé de l'invention comprend les étapes d'agrégation de particules de scories solides en une matière granulaire plus grossière 33 et de leur carbonatation pour produire ledit fondant de scorification 40. Dans un mode de réalisation préféré, lesdites particules de scories solides sont agrégées avant ladite carbonatation de telle sorte que les carbonates forment une matrice solide liant les particules ensemble.

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