Process for fixing lead-contaminated ecologically hazardous...

Details Process for fixing lead-contaminated ecologically hazardous... Process for fixing lead-contaminated ecologically hazardous...

B - Operations, Transporting

09

B

B09B 3/00 (2006.01) C04B 18/30 (2006.01) C04B 28/02 (2006.01) C04B 32/00 (2006.01) A62D 3/00 (2006.01)

Patent

CA 2095931

There is provided a method for the ecologically safe disposal of lead-contaminated hazardous industrial wastes (such, as for example, those generated as discardable by-products in primary and secondary lead smelting operations, especially, blast furnace slags and matte), which comprises reducing the size of the lead-contaminated industrial wastes and treating them, prior to encapsulation in a hardenable material, with the naturally occurring zeolite, clinoptilolite, in an amount sufficient to prevent lead ions (Pb +2) from leaching out of such industrial wastes, through exposure to the action of atmospheric agents (e.g., hot air and rain, or as a result of cyclical freezing and thawing in temperature climates), even over an extended period of time.

On décrit un procédé de rejet, écologiquement sans danger, de déchets industriels dangereux contaminés par le plomb (tels que, par exemple, ceux générés comme sous-produits jetables dans les opérations primaires et secondaires de fonte du plomb, en particulier, les scories et la matte des hauts-fourneaux) consistant à réduire la taille des déchets industriels contaminés par le plomb et à les traiter avant de les encapsuler dans un matériau durcissable, avec la zéolite se formant naturellement - la clinoptilolite - en quantité suffisante pour empêcher les ions de plomb (Pb+2) de s'écouler hors des déchets industriels et de s'exposer à l'action d'agents atmosphériques (par ex, l'air chaud et la pluie, ou suite au gel et au dégel cycliques dans les climats à variation de température), même sur une période de temps étendue.

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