Reuse of metallurgical fines

C - Chemistry – Metallurgy – 22 – B

Patent

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C22B 7/02 (2006.01) C22B 1/243 (2006.01) C22B 1/245 (2006.01)

Patent

CA 2215409

Waste material containing heavy metals are mixed with oily mill scale or with reduced iron or fines and with a fine grained carrier material having a low density until a crumbly mixed product results, of which a fine fraction of between 0 and 6 mm in grain size is sievable for injection into a metallurgical furnace. Water may be added to the mixed product using wet carbon-containing slurries. Lime-containing dusts may be added.

Des matériaux de déchet contenant des métaux lourds sont mélangés avec des pailles huileuses ou avec des fines de minerai de fer réduit et avec un matériau porteur finement granulé ayant une densité basse jusqu'à l'obtention d'un produit de mélange émietté, dont une portion fine comprenant des grains dont la taille est comprise entre 0 et 6 mm est tamisable afin d'être injectée dans un four métallurgique. De l'eau peut être ajoutée au produit mélangé à l'aide de boues mouillées contenant du carbone. Des poussières contenant de la chaux peuvent être ajoutées.

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