C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 7/153 (2006.01) C04B 5/06 (2006.01) C04B 18/14 (2006.01) C21C 5/36 (2006.01)
Patent
CA 2410200
The invention concerns a treatment method comprising injection of oxygen into the liquid steel works slag, adding and dissolving in the slag alumina and lime sources, and optionally silica and iron sources and cooling the slag until solidification, the additions being carried out in such amounts and the cooling being performed at such speed that the resulting slag has a mineralogical composition having one of the following constituting element: (a) an amorphous glassy phase; (b) a first group of phases (1) consisting, in weight percentages, of 10-40 CA, 20-50 C2AS, 30-50 C6AF2 and 10-30 C2S; (c) a second group of phases (2) consisting, in weight percentages, of 20-40 C2F, 10-30 C2AS, 20-50 C6AF2 and 10-40 C2S, and (d) a mixture of amorphous glassy phase and of the first or second group of phases. The invention is applicable to hydraulic binders.
Le procédé de traitement de l'invention comprend l'injection d'oxygène dans le laitier d'aciérie liquide, l'ajout et la dissolution dans le laitier de sources d'alumine et de chaux, et éventuellement de silice et de fer et le refroidissement du laitier jusqu'à solidification, les ajouts étant effectués en quantités telles et le refroidissement étant effectué à une vitesse telle que le laitier traité obtenu a une composition minéralogique ayant l'une des constitutions suivantes: (a) une phase vitreuse amorphe; (b) un premier assemblage de phases (1) constitué, en pourcent en poids, de 10-40 CA, 20-50 C2AS, 30-50 C6AF2 et 10-30 C2S; (c) un deuxième assemblage de phases (2) constitué, en pourcent en poids, de 20-40 C2F, 10-30 C2AS, 20-50 C6AF2 et 10- 40 C2S, et (d) un mélange d'une phase vitreuse amorphe et du premier ou second assemblage de phases. Application aux liants hydrauliques.
Bayoux Jean-Pierre
Chaperon Guy
Sorrentino Francois
Lafarge
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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