C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 1/242 (2006.01) C22B 1/243 (2006.01) C22B 1/244 (2006.01)
Patent
CA 2499146
The invention pertains to a process for producing iron oxide-containing pellets wherein fine ore particles are agglomerated in the presence of an inorganic and/or organic binder and a binder additive which serves to improve the preheat strength of the pellets. The binder additive can be a boron- containing compound or calcium fluoride. The invention is particularly suitable for organic binders, such as carboxymethyl cellulose. A preferred binder additive is sodium borate.
Cette invention a tait à un procédé de production de granules contenant de l'oxyde de fer. Dans le cadre de ce procédé, on agglomère de fines particules d'oxyde fer en présence d'un agent agglomérant inorganique et/ou organique et d'un produit d'addition pour agent agglomérant, afin de renforcer la résistance des granules au préchauffage. Ce produit d'addition peut être un composé contenant du bore ou bien un fluorure de calcium. Cette invention convient parfaitement à des agents agglomérants organiques.
Basdag Ali
Schmitt James John
Akzo Nobel Nv
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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