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1. WO2012127090 - METHOD FOR STABILIZING PHOSPHOGYPSUM TO REDUCE NATURAL RADIONUCLIDE EMISSIONS

Publication Number WO/2012/127090
Publication Date 27.09.2012
International Application No. PCT/ES2012/070178
International Filing Date 21.03.2012
IPC
C04B 11/26 2006.01
CCHEMISTRY; METALLURGY
04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
BLIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
11Calcium sulfate cements
26starting from phosphogypsum or from waste, e.g. purification products of smoke
C04B 18/04 2006.01
CCHEMISTRY; METALLURGY
04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
BLIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
18Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
04Waste materials; Refuse
C04B 28/14 2006.01
CCHEMISTRY; METALLURGY
04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
BLIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
28Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
14containing calcium sulfate cements
C04B 22/14 2006.01
CCHEMISTRY; METALLURGY
04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
BLIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
22Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators
08Acids or salts thereof
14containing sulfur in the anion, e.g. sulfides
CPC
C04B 11/26
CCHEMISTRY; METALLURGY
04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE
11Calcium sulfate cements
26strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
C04B 28/143
CCHEMISTRY; METALLURGY
04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE
28Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
14containing calcium sulfate cements
142containing synthetic or waste calcium sulfate cements
143the synthetic calcium sulfate being phosphogypsum
C04B 28/36
CCHEMISTRY; METALLURGY
04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE
28Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
36containing sulfur, sulfides or selenium
Applicants
  • CONSEJO SUPERIOR DE INVESTIGACIONES CIENTÍFICAS (CSIC) [ES]/[ES] (AllExceptUS)
  • UNIVERSIDAD DE HUELVA [ES]/[ES] (AllExceptUS)
  • CENTRO DE INVESTIGACIONES ENERGÉTICAS, MEDIOAMBIENTALES Y TECNOLÓGICAS (CIEMAT) [ES]/[ES] (AllExceptUS)
  • LÓPEZ GÓMEZ, Félix Antonio [ES]/[ES] (UsOnly)
  • AGUACIL PRIEGO, Francisco José [ES]/[ES] (UsOnly)
  • LÓPEZ DELGADO, Aurora [ES]/[ES] (UsOnly)
  • TAYIBI EL AMRANI, Hanan [ES]/[ES] (UsOnly)
  • GARCÍA DÍAZ, Irene [ES]/[ES] (UsOnly)
  • GASCO LEONARTE, Catalina [ES]/[ES] (UsOnly)
  • BOLIVAR RAYA, Juan Pedro [ES]/[ES] (UsOnly)
  • GASQUEZ GONZÁLEZ, Manuel Jesús [ES]/[ES] (UsOnly)
Inventors
  • LÓPEZ GÓMEZ, Félix Antonio
  • AGUACIL PRIEGO, Francisco José
  • LÓPEZ DELGADO, Aurora
  • TAYIBI EL AMRANI, Hanan
  • GARCÍA DÍAZ, Irene
  • GASCO LEONARTE, Catalina
  • BOLIVAR RAYA, Juan Pedro
  • GASQUEZ GONZÁLEZ, Manuel Jesús
Agents
  • UNGRIA LÓPEZ, Javier
Priority Data
P20113040922.03.2011ES
Publication Language Spanish (ES)
Filing Language Spanish (ES)
Designated States
Title
(EN) METHOD FOR STABILIZING PHOSPHOGYPSUM TO REDUCE NATURAL RADIONUCLIDE EMISSIONS
(ES) PROCEDIMIENTO DE ESTABILIZACIÓN DE FOSFOYESOS PARA LA DISMINUCIÓN DE LAS EMISIONES DE RADIONUCLEIDOS NATURALES
(FR) PROCÉDÉ DE STABILISATION DE PHOSPHOGYPSES POUR LA RÉDUCTION DES ÉMISSIONS DE RADIONUCLÉIDES NATURELS
Abstract
(EN)
A method for stabilizing phosphogypsum, characterized in that it comprises the following steps: a) initial preparation of the phosphogypsum by means of filtration, neutralization to a pH of at least 4, and drying to a moisture content of at most 10%; b) preparation of a mixture of at least gravel, sand, elemental sulphur and the phosphogypsum resulting from step a); c) heating of said mixture resulting from step b) between 150°C and 165°C; d) cooling of the mixture obtained in step c) to 130-150°C and addition of at least one sulphur polymer, resulting in a polymeric sulphur cement; e) forming, by means of vibration, of the polymeric cement obtained in step d); and f) cooling of the formed polymeric cement.
(ES)
Un procedimiento de estabilización de fosfoyeso caracterizado porque comprende las siguientes etapas: a) Preparación inicial del fosfoyeso mediante filtración, neutralización hasta pH de al menos 4 y secado hasta que tenga una humedad igual o inferior al 10 %, b) preparar una mezcla de al menos grava, arena, azufre elemental y el fosfoyeso resultante de la etapa a), c) calentar dicha mezcla obtenida en la etapa b) entre 150ºC y 165ºC, d) enfriar la mezcla obtenida en la etapa c) a 130-150ºC y añadir al menos un polímero de azufre, obteniendo un cemento polimérico de azufre, e) conformar el cemento polimérico obtenido en la etapa d) mediante vibración, f) enfriar el cemento polimérico conformado.
(FR)
L'invention concerne un procédé de stabilisation de phosphogypses caractérisé en ce qu'il comprend les étapes suivantes: a) préparation initiale du phosphogypse par filtration, neutralisation jusqu'à un pH d'au moins 4 et séchage jusqu'à ce qu'il présente une humidité égale ou inférieure à 10%; b) préparation d'un mélange renfermant au moins du gravier, du sable, du soufre élémentaire et le phosphogypse résultant de l'étape a); c) chauffage du mélange obtenu dans l'étape b) à 150-165°C; d) refroidissement du mélange obtenu dans l'étape c) à 130-150°C et ajout d'au moins un polymère de soufre, d'où l'obtention d'un ciment polymère de soufre; e) mise en forme du ciment polymère obtenu dans l'étape d) par vibration; et f) refroidissement du ciment polymère mis en forme.
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