Unimetal - Societe Francaise Des Aciers Longs

Fibac

Vb2m

"s.a.g.a.c.e." Services En Administration, Gestion Et Applications Au Conseil À L'environnement

Laurent Rizet

Pierre E Charpentier

Valerie Bouclier

Eric Marcadier

Daniel Daviller

Cyril Trouillet

Valérie Bouclier

A process for processing metallurgic residue that is obtained from electric steelworks dust, ESD, essentially containing iron and zinc in the form of zinc oxide and zinc ferrites, as well as a processing of the blast-furnace slags, BFS, and a combination with a synergy effect.

Method for processing and recycling zinc-rich iron metallurgy side products

A method for treating residues derived from garbage and/or industrial waste incineration fumes including the steps of desalting the residues by washing with sodium carbonate in sufficient amount or slightly in excess to solubilize all the salts including the sulphates and precipitate the soluble calcium, the pH being higher than 11, then carrying out a solid/liquid separation to obtain a desalinated cake; leaching the desalinated cake with sodium carbonate in sufficient amount or slightly in excess to obtain, by reaction with the lime present in the cake or added thereto if necessary, the alkalinity required for solubilising amphoteric metals, the pH being higher than 12, and obtaining by solid/liquid separation a cake and a supernatant which is neutralised with carbon dioxide, and filtering the recovered solution to obtain metal hydroxide sludge and an aqueous sodium carbonate solution; and neutralising the resulting residues at a pH between 6.5 and 8.5.

Method for treating residues resulting from the purification of garbage and/or industrial waste incineration fumes

Process for decontamination soils polluted with metals

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Viuz en Sallaz, France

Laurent Rizet